./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:55:45,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:55:45,807 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 01:55:45,813 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:55:45,814 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:55:45,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:55:45,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:55:45,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:55:45,842 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:55:45,842 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:55:45,843 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:55:45,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:55:45,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:55:45,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:55:45,845 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:55:45,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:55:45,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:55:45,847 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:55:45,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:55:45,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:55:45,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:55:45,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:55:45,852 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:55:45,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:55:45,853 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 01:55:45,854 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:55:45,854 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:55:45,854 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:55:45,855 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:55:45,855 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:55:45,855 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:55:45,856 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:55:45,856 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:55:45,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:55:45,857 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:55:45,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:55:45,857 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:55:45,857 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:55:45,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:55:45,858 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:55:45,858 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:55:45,858 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:55:45,858 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:55:45,858 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:55:45,859 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 [2023-11-29 01:55:46,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:55:46,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:55:46,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:55:46,101 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:55:46,101 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:55:46,103 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c [2023-11-29 01:55:48,856 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:55:49,037 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:55:49,037 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c [2023-11-29 01:55:49,043 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/data/a12ea4ad2/c2391eb989ce4b8e87e76fd71dce90c6/FLAG35acf5672 [2023-11-29 01:55:49,055 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/data/a12ea4ad2/c2391eb989ce4b8e87e76fd71dce90c6 [2023-11-29 01:55:49,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:55:49,059 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:55:49,060 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:55:49,060 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:55:49,064 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:55:49,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,066 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4a1bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49, skipping insertion in model container [2023-11-29 01:55:49,066 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,090 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:55:49,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:55:49,280 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:55:49,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:55:49,323 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:55:49,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49 WrapperNode [2023-11-29 01:55:49,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:55:49,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:55:49,325 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:55:49,325 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:55:49,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,343 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,369 INFO L138 Inliner]: procedures = 16, calls = 77, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 117 [2023-11-29 01:55:49,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:55:49,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:55:49,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:55:49,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:55:49,382 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,386 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,405 INFO L175 MemorySlicer]: Split 46 memory accesses to 8 slices as follows [2, 4, 8, 6, 7, 7, 8, 4]. 17 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0]. The 13 writes are split as follows [0, 2, 1, 2, 1, 2, 3, 2]. [2023-11-29 01:55:49,406 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,406 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,414 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,417 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,425 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:55:49,426 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:55:49,426 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:55:49,426 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:55:49,427 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (1/1) ... [2023-11-29 01:55:49,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:55:49,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:49,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:55:49,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:55:49,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:55:49,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:55:49,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:55:49,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:55:49,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:55:49,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 01:55:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 01:55:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 01:55:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-29 01:55:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:55:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:55:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:55:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:55:49,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:55:49,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 01:55:49,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 01:55:49,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-29 01:55:49,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-29 01:55:49,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:55:49,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:55:49,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:55:49,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:55:49,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:55:49,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:55:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 01:55:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 01:55:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-29 01:55:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-29 01:55:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_41_0 [2023-11-29 01:55:49,500 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_41_0 [2023-11-29 01:55:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 01:55:49,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 01:55:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:55:49,617 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:55:49,620 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:55:50,031 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:55:50,066 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:55:50,066 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 01:55:50,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:55:50 BoogieIcfgContainer [2023-11-29 01:55:50,067 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:55:50,070 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:55:50,070 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:55:50,073 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:55:50,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:55:49" (1/3) ... [2023-11-29 01:55:50,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a10069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:55:50, skipping insertion in model container [2023-11-29 01:55:50,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:49" (2/3) ... [2023-11-29 01:55:50,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a10069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:55:50, skipping insertion in model container [2023-11-29 01:55:50,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:55:50" (3/3) ... [2023-11-29 01:55:50,076 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_bresenham-ll.c [2023-11-29 01:55:50,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:55:50,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2023-11-29 01:55:50,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:55:50,147 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33d7ce8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:55:50,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2023-11-29 01:55:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 130 states have internal predecessors, (133), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 01:55:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-29 01:55:50,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:50,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-29 01:55:50,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:50,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash 6289, now seen corresponding path program 1 times [2023-11-29 01:55:50,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:50,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113562004] [2023-11-29 01:55:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:50,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:50,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:50,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113562004] [2023-11-29 01:55:50,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113562004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:50,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:50,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:55:50,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454296609] [2023-11-29 01:55:50,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:50,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:50,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:50,541 INFO L87 Difference]: Start difference. First operand has 136 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 130 states have internal predecessors, (133), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:50,613 INFO L93 Difference]: Finished difference Result 262 states and 275 transitions. [2023-11-29 01:55:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-29 01:55:50,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:50,622 INFO L225 Difference]: With dead ends: 262 [2023-11-29 01:55:50,622 INFO L226 Difference]: Without dead ends: 132 [2023-11-29 01:55:50,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:50,631 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:50,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 258 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:55:50,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-29 01:55:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-29 01:55:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 70 states have (on average 1.8285714285714285) internal successors, (128), 127 states have internal predecessors, (128), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 01:55:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2023-11-29 01:55:50,682 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 2 [2023-11-29 01:55:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:50,682 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2023-11-29 01:55:50,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2023-11-29 01:55:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-29 01:55:50,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:50,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-29 01:55:50,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:55:50,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:50,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:50,685 INFO L85 PathProgramCache]: Analyzing trace with hash 195081, now seen corresponding path program 1 times [2023-11-29 01:55:50,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:50,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332768289] [2023-11-29 01:55:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:50,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:50,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:50,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332768289] [2023-11-29 01:55:50,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332768289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:50,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:50,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:55:50,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697523558] [2023-11-29 01:55:50,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:50,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:50,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:50,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:50,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:50,820 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:50,852 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2023-11-29 01:55:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:50,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-29 01:55:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:50,854 INFO L225 Difference]: With dead ends: 132 [2023-11-29 01:55:50,855 INFO L226 Difference]: Without dead ends: 131 [2023-11-29 01:55:50,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:50,857 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 4 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:50,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 252 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:55:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-29 01:55:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-29 01:55:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 70 states have (on average 1.8142857142857143) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 01:55:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2023-11-29 01:55:50,872 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 3 [2023-11-29 01:55:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:50,872 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2023-11-29 01:55:50,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2023-11-29 01:55:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-29 01:55:50,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:50,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-29 01:55:50,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:55:50,874 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:50,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash 6047635, now seen corresponding path program 1 times [2023-11-29 01:55:50,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:50,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658273179] [2023-11-29 01:55:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:51,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:51,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658273179] [2023-11-29 01:55:51,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658273179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:51,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:51,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:55:51,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069172943] [2023-11-29 01:55:51,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:51,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:55:51,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:51,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:55:51,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:55:51,052 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:51,118 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2023-11-29 01:55:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:55:51,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-29 01:55:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:51,121 INFO L225 Difference]: With dead ends: 131 [2023-11-29 01:55:51,121 INFO L226 Difference]: Without dead ends: 130 [2023-11-29 01:55:51,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:55:51,123 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 5 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:51,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 373 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:55:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-29 01:55:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-11-29 01:55:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 70 states have (on average 1.8) internal successors, (126), 125 states have internal predecessors, (126), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 01:55:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2023-11-29 01:55:51,135 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 4 [2023-11-29 01:55:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:51,135 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2023-11-29 01:55:51,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2023-11-29 01:55:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 01:55:51,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:51,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 01:55:51,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:55:51,136 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:51,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:51,137 INFO L85 PathProgramCache]: Analyzing trace with hash 187476811, now seen corresponding path program 1 times [2023-11-29 01:55:51,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:51,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024632585] [2023-11-29 01:55:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:51,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:51,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:51,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024632585] [2023-11-29 01:55:51,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024632585] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:51,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:51,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:55:51,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433699424] [2023-11-29 01:55:51,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:51,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:55:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:51,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:55:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:55:51,285 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:51,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:51,333 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2023-11-29 01:55:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:55:51,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-29 01:55:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:51,335 INFO L225 Difference]: With dead ends: 130 [2023-11-29 01:55:51,335 INFO L226 Difference]: Without dead ends: 129 [2023-11-29 01:55:51,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:55:51,337 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 2 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:51,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 373 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:55:51,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-29 01:55:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-29 01:55:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 01:55:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2023-11-29 01:55:51,349 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 5 [2023-11-29 01:55:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:51,349 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2023-11-29 01:55:51,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2023-11-29 01:55:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 01:55:51,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:51,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:51,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:55:51,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:51,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash 56144521, now seen corresponding path program 1 times [2023-11-29 01:55:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:51,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712611879] [2023-11-29 01:55:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:51,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:51,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:51,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404746178] [2023-11-29 01:55:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:51,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:51,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:51,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:51,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:55:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:51,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:55:51,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:51,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:51,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:51,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:51,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712611879] [2023-11-29 01:55:51,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:51,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404746178] [2023-11-29 01:55:51,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404746178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:51,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:51,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:55:51,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890921048] [2023-11-29 01:55:51,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:51,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:55:51,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:51,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:55:51,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:55:51,664 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:51,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:51,822 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2023-11-29 01:55:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:55:51,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 01:55:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:51,825 INFO L225 Difference]: With dead ends: 247 [2023-11-29 01:55:51,825 INFO L226 Difference]: Without dead ends: 245 [2023-11-29 01:55:51,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:55:51,827 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 272 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:51,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 592 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:55:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-29 01:55:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 154. [2023-11-29 01:55:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 93 states have (on average 1.7741935483870968) internal successors, (165), 147 states have internal predecessors, (165), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 01:55:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 174 transitions. [2023-11-29 01:55:51,843 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 174 transitions. Word has length 9 [2023-11-29 01:55:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:51,844 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 174 transitions. [2023-11-29 01:55:51,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 174 transitions. [2023-11-29 01:55:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 01:55:51,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:51,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:51,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:55:52,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:52,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_0_to_41_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:52,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1879688981, now seen corresponding path program 1 times [2023-11-29 01:55:52,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:52,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230965721] [2023-11-29 01:55:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:52,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:52,086 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:52,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793525182] [2023-11-29 01:55:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:52,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:52,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:52,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:52,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:55:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:52,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:55:52,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:52,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:52,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:52,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:52,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230965721] [2023-11-29 01:55:52,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:52,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793525182] [2023-11-29 01:55:52,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793525182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:52,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:52,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:55:52,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96673899] [2023-11-29 01:55:52,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:52,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:55:52,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:55:52,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:55:52,299 INFO L87 Difference]: Start difference. First operand 154 states and 174 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:52,445 INFO L93 Difference]: Finished difference Result 275 states and 299 transitions. [2023-11-29 01:55:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:55:52,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 01:55:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:52,448 INFO L225 Difference]: With dead ends: 275 [2023-11-29 01:55:52,449 INFO L226 Difference]: Without dead ends: 273 [2023-11-29 01:55:52,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:55:52,450 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 227 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:52,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 666 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:55:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-29 01:55:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 190. [2023-11-29 01:55:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 125 states have (on average 1.752) internal successors, (219), 180 states have internal predecessors, (219), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:55:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 235 transitions. [2023-11-29 01:55:52,466 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 235 transitions. Word has length 11 [2023-11-29 01:55:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:52,467 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 235 transitions. [2023-11-29 01:55:52,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 235 transitions. [2023-11-29 01:55:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 01:55:52,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:52,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:52,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:55:52,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:52,669 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_0_to_41_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:52,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:52,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1800122189, now seen corresponding path program 1 times [2023-11-29 01:55:52,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:52,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125432218] [2023-11-29 01:55:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:52,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:52,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:52,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032407709] [2023-11-29 01:55:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:52,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:52,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:52,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:52,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:55:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:52,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:55:52,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:52,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:52,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:52,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:52,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:52,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125432218] [2023-11-29 01:55:52,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:52,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032407709] [2023-11-29 01:55:52,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032407709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:52,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:52,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:55:52,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686025552] [2023-11-29 01:55:52,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:52,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:55:52,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:55:52,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:55:52,923 INFO L87 Difference]: Start difference. First operand 190 states and 235 transitions. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:53,215 INFO L93 Difference]: Finished difference Result 284 states and 321 transitions. [2023-11-29 01:55:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:55:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 01:55:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:53,218 INFO L225 Difference]: With dead ends: 284 [2023-11-29 01:55:53,218 INFO L226 Difference]: Without dead ends: 283 [2023-11-29 01:55:53,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:55:53,220 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 311 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:53,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 798 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:55:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-29 01:55:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 190. [2023-11-29 01:55:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 125 states have (on average 1.744) internal successors, (218), 180 states have internal predecessors, (218), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:55:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 234 transitions. [2023-11-29 01:55:53,233 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 234 transitions. Word has length 13 [2023-11-29 01:55:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:53,234 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 234 transitions. [2023-11-29 01:55:53,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 234 transitions. [2023-11-29 01:55:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 01:55:53,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:53,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:53,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:55:53,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:53,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_0_to_41_0Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:53,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:53,443 INFO L85 PathProgramCache]: Analyzing trace with hash -30786944, now seen corresponding path program 1 times [2023-11-29 01:55:53,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:53,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531040008] [2023-11-29 01:55:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:53,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:53,466 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:53,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716748592] [2023-11-29 01:55:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:53,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:53,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:53,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:55:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:53,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:55:53,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:53,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:53,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:53,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:53,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531040008] [2023-11-29 01:55:53,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:53,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716748592] [2023-11-29 01:55:53,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716748592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:53,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:53,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:55:53,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661313534] [2023-11-29 01:55:53,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:53,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:55:53,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:53,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:55:53,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:55:53,703 INFO L87 Difference]: Start difference. First operand 190 states and 234 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:53,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:53,974 INFO L93 Difference]: Finished difference Result 283 states and 320 transitions. [2023-11-29 01:55:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:55:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 01:55:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:53,976 INFO L225 Difference]: With dead ends: 283 [2023-11-29 01:55:53,977 INFO L226 Difference]: Without dead ends: 282 [2023-11-29 01:55:53,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:55:53,978 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 350 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:53,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 750 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:55:53,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-11-29 01:55:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 190. [2023-11-29 01:55:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 125 states have (on average 1.736) internal successors, (217), 180 states have internal predecessors, (217), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:55:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 233 transitions. [2023-11-29 01:55:53,990 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 233 transitions. Word has length 14 [2023-11-29 01:55:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:53,990 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 233 transitions. [2023-11-29 01:55:53,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 233 transitions. [2023-11-29 01:55:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 01:55:53,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:53,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:53,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:55:54,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:54,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_0_to_41_0Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:54,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash -954395217, now seen corresponding path program 1 times [2023-11-29 01:55:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:54,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105644052] [2023-11-29 01:55:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:54,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:54,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53467689] [2023-11-29 01:55:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:54,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:54,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:54,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:54,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:55:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:54,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 01:55:54,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:54,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:54,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:54,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:54,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:54,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105644052] [2023-11-29 01:55:54,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:54,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53467689] [2023-11-29 01:55:54,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53467689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:54,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:54,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:55:54,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164610227] [2023-11-29 01:55:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:54,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:55:54,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:55:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:55:54,451 INFO L87 Difference]: Start difference. First operand 190 states and 233 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:54,710 INFO L93 Difference]: Finished difference Result 279 states and 300 transitions. [2023-11-29 01:55:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:55:54,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 01:55:54,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:54,713 INFO L225 Difference]: With dead ends: 279 [2023-11-29 01:55:54,713 INFO L226 Difference]: Without dead ends: 277 [2023-11-29 01:55:54,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:55:54,714 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 353 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:54,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 752 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:55:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-29 01:55:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 190. [2023-11-29 01:55:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 125 states have (on average 1.704) internal successors, (213), 180 states have internal predecessors, (213), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:55:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 229 transitions. [2023-11-29 01:55:54,730 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 229 transitions. Word has length 15 [2023-11-29 01:55:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:54,731 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 229 transitions. [2023-11-29 01:55:54,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 229 transitions. [2023-11-29 01:55:54,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 01:55:54,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:54,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:54,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:55:54,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 01:55:54,933 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_0_to_41_0Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:54,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1949199377, now seen corresponding path program 1 times [2023-11-29 01:55:54,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:54,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498651539] [2023-11-29 01:55:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:54,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:54,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:54,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200581884] [2023-11-29 01:55:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:54,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:54,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:54,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:54,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:55:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:55,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 01:55:55,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:55,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:55,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:55,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:55,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:55,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498651539] [2023-11-29 01:55:55,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:55,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200581884] [2023-11-29 01:55:55,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200581884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:55,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:55,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:55:55,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967536717] [2023-11-29 01:55:55,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:55,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:55:55,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:55,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:55:55,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:55:55,218 INFO L87 Difference]: Start difference. First operand 190 states and 229 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:55,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:55,486 INFO L93 Difference]: Finished difference Result 280 states and 315 transitions. [2023-11-29 01:55:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:55:55,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 01:55:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:55,489 INFO L225 Difference]: With dead ends: 280 [2023-11-29 01:55:55,489 INFO L226 Difference]: Without dead ends: 279 [2023-11-29 01:55:55,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:55:55,491 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 354 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:55,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 753 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:55:55,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-11-29 01:55:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 190. [2023-11-29 01:55:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 125 states have (on average 1.696) internal successors, (212), 180 states have internal predecessors, (212), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:55:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 228 transitions. [2023-11-29 01:55:55,524 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 228 transitions. Word has length 17 [2023-11-29 01:55:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:55,524 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 228 transitions. [2023-11-29 01:55:55,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 228 transitions. [2023-11-29 01:55:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 01:55:55,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:55,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:55,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:55:55,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:55:55,728 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_0_to_41_0Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:55,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash 295638596, now seen corresponding path program 1 times [2023-11-29 01:55:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:55,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200233731] [2023-11-29 01:55:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:55,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:55,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174289076] [2023-11-29 01:55:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:55,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:55,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:55,753 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:55,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:55:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:55,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-29 01:55:55,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:55,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:55:55,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:55,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:56,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-29 01:55:56,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:56,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:56,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:56,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:56,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200233731] [2023-11-29 01:55:56,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:56,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174289076] [2023-11-29 01:55:56,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174289076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:56,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:56,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:55:56,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459994469] [2023-11-29 01:55:56,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:56,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:55:56,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:56,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:55:56,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:55:56,172 INFO L87 Difference]: Start difference. First operand 190 states and 228 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:56,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:56,611 INFO L93 Difference]: Finished difference Result 274 states and 303 transitions. [2023-11-29 01:55:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:55:56,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 01:55:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:56,614 INFO L225 Difference]: With dead ends: 274 [2023-11-29 01:55:56,614 INFO L226 Difference]: Without dead ends: 273 [2023-11-29 01:55:56,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:55:56,615 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 291 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:56,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 764 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:55:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-29 01:55:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 190. [2023-11-29 01:55:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 125 states have (on average 1.688) internal successors, (211), 180 states have internal predecessors, (211), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:55:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 227 transitions. [2023-11-29 01:55:56,625 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 227 transitions. Word has length 18 [2023-11-29 01:55:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:56,625 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 227 transitions. [2023-11-29 01:55:56,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 227 transitions. [2023-11-29 01:55:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 01:55:56,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:56,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:56,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:55:56,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:56,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_0_to_41_0Err10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:56,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash 574861939, now seen corresponding path program 1 times [2023-11-29 01:55:56,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:56,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156489423] [2023-11-29 01:55:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:56,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:56,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:56,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709722251] [2023-11-29 01:55:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:56,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:56,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:56,847 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:56,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:55:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:56,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 01:55:57,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:57,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:55:57,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:57,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:57,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:57,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:57,363 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 [2023-11-29 01:55:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:57,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:57,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:57,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156489423] [2023-11-29 01:55:57,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:57,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709722251] [2023-11-29 01:55:57,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709722251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:57,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:57,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:55:57,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662818777] [2023-11-29 01:55:57,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:57,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:55:57,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:57,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:55:57,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:55:57,385 INFO L87 Difference]: Start difference. First operand 190 states and 227 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:57,987 INFO L93 Difference]: Finished difference Result 273 states and 302 transitions. [2023-11-29 01:55:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:55:57,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-29 01:55:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:57,990 INFO L225 Difference]: With dead ends: 273 [2023-11-29 01:55:57,990 INFO L226 Difference]: Without dead ends: 272 [2023-11-29 01:55:57,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:55:57,991 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 258 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:57,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 892 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:55:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-29 01:55:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 190. [2023-11-29 01:55:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 125 states have (on average 1.68) internal successors, (210), 180 states have internal predecessors, (210), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:55:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2023-11-29 01:55:58,002 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 19 [2023-11-29 01:55:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:58,002 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2023-11-29 01:55:58,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2023-11-29 01:55:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 01:55:58,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:58,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:58,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 01:55:58,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:58,208 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_0_to_41_0Err11ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:58,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:58,208 INFO L85 PathProgramCache]: Analyzing trace with hash 640850982, now seen corresponding path program 1 times [2023-11-29 01:55:58,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:58,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23504783] [2023-11-29 01:55:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:58,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:58,224 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:58,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194986573] [2023-11-29 01:55:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:58,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:58,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:58,225 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:58,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:55:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:58,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-29 01:55:58,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:58,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:55:58,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:55:58,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:58,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:58,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-29 01:55:58,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:58,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:55:58,780 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 [2023-11-29 01:55:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:58,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:58,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23504783] [2023-11-29 01:55:58,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194986573] [2023-11-29 01:55:58,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194986573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:58,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:58,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:55:58,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530805397] [2023-11-29 01:55:58,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:58,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:55:58,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:58,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:55:58,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:55:58,811 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:59,458 INFO L93 Difference]: Finished difference Result 272 states and 301 transitions. [2023-11-29 01:55:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:55:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-29 01:55:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:59,460 INFO L225 Difference]: With dead ends: 272 [2023-11-29 01:55:59,460 INFO L226 Difference]: Without dead ends: 271 [2023-11-29 01:55:59,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:55:59,461 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 252 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:59,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 878 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:55:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-11-29 01:55:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 190. [2023-11-29 01:55:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 125 states have (on average 1.672) internal successors, (209), 180 states have internal predecessors, (209), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:55:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 225 transitions. [2023-11-29 01:55:59,472 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 225 transitions. Word has length 20 [2023-11-29 01:55:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:59,473 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 225 transitions. [2023-11-29 01:55:59,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 225 transitions. [2023-11-29 01:55:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 01:55:59,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:59,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:59,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:55:59,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:59,674 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting func_to_recursive_line_0_to_41_0Err12ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:55:59,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:59,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1608455979, now seen corresponding path program 1 times [2023-11-29 01:55:59,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:59,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627680230] [2023-11-29 01:55:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:59,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:59,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:59,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819007072] [2023-11-29 01:55:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:59,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:59,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:59,691 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:59,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:55:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:59,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:55:59,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:59,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:55:59,918 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 [2023-11-29 01:55:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:59,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:59,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:59,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627680230] [2023-11-29 01:55:59,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:59,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819007072] [2023-11-29 01:55:59,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819007072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:59,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:59,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:55:59,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580501469] [2023-11-29 01:55:59,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:59,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:55:59,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:59,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:55:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:55:59,928 INFO L87 Difference]: Start difference. First operand 190 states and 225 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:00,046 INFO L93 Difference]: Finished difference Result 190 states and 225 transitions. [2023-11-29 01:56:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:56:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-29 01:56:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:00,048 INFO L225 Difference]: With dead ends: 190 [2023-11-29 01:56:00,048 INFO L226 Difference]: Without dead ends: 189 [2023-11-29 01:56:00,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:56:00,049 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 186 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:00,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 372 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:56:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-29 01:56:00,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-11-29 01:56:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 125 states have (on average 1.648) internal successors, (206), 179 states have internal predecessors, (206), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:56:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 222 transitions. [2023-11-29 01:56:00,059 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 222 transitions. Word has length 21 [2023-11-29 01:56:00,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:00,059 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 222 transitions. [2023-11-29 01:56:00,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 222 transitions. [2023-11-29 01:56:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 01:56:00,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:00,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:00,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:56:00,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:00,261 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting func_to_recursive_line_0_to_41_0Err13ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:56:00,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:00,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1677472264, now seen corresponding path program 1 times [2023-11-29 01:56:00,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:00,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17752946] [2023-11-29 01:56:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:00,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:00,279 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:00,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290661399] [2023-11-29 01:56:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:00,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:00,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:00,281 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:00,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:56:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:00,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:56:00,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:00,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:00,505 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 [2023-11-29 01:56:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:00,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:56:00,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:00,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17752946] [2023-11-29 01:56:00,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:56:00,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290661399] [2023-11-29 01:56:00,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290661399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:00,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:00,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:56:00,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082709495] [2023-11-29 01:56:00,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:00,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:56:00,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:00,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:56:00,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:56:00,515 INFO L87 Difference]: Start difference. First operand 189 states and 222 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:00,613 INFO L93 Difference]: Finished difference Result 189 states and 222 transitions. [2023-11-29 01:56:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:56:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 01:56:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:00,614 INFO L225 Difference]: With dead ends: 189 [2023-11-29 01:56:00,614 INFO L226 Difference]: Without dead ends: 188 [2023-11-29 01:56:00,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:56:00,615 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 182 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:00,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 372 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:56:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-29 01:56:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-11-29 01:56:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 125 states have (on average 1.624) internal successors, (203), 178 states have internal predecessors, (203), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:56:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 219 transitions. [2023-11-29 01:56:00,626 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 219 transitions. Word has length 22 [2023-11-29 01:56:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:00,627 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 219 transitions. [2023-11-29 01:56:00,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 219 transitions. [2023-11-29 01:56:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 01:56:00,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:00,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:00,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:56:00,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:56:00,828 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting func_to_recursive_line_0_to_41_0Err14ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:56:00,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:00,829 INFO L85 PathProgramCache]: Analyzing trace with hash 462032695, now seen corresponding path program 1 times [2023-11-29 01:56:00,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:00,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843003410] [2023-11-29 01:56:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:00,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:00,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:00,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839878470] [2023-11-29 01:56:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:00,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:00,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:00,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:00,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:56:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:00,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 01:56:01,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:01,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:01,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:01,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:56:01,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:56:01,379 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 13 treesize of output 9 [2023-11-29 01:56:01,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:56:01,518 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 [2023-11-29 01:56:01,778 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 [2023-11-29 01:56:01,903 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 [2023-11-29 01:56:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:02,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:56:02,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:02,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843003410] [2023-11-29 01:56:02,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:56:02,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839878470] [2023-11-29 01:56:02,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839878470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:02,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:02,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 01:56:02,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765779279] [2023-11-29 01:56:02,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:02,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:56:02,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:56:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:56:02,011 INFO L87 Difference]: Start difference. First operand 188 states and 219 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:03,444 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2023-11-29 01:56:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:56:03,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 01:56:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:03,446 INFO L225 Difference]: With dead ends: 267 [2023-11-29 01:56:03,446 INFO L226 Difference]: Without dead ends: 266 [2023-11-29 01:56:03,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:56:03,447 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 244 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:03,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 1011 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:56:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-11-29 01:56:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 188. [2023-11-29 01:56:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 125 states have (on average 1.616) internal successors, (202), 178 states have internal predecessors, (202), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:56:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2023-11-29 01:56:03,459 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 23 [2023-11-29 01:56:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:03,459 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2023-11-29 01:56:03,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2023-11-29 01:56:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 01:56:03,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:03,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:03,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:56:03,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:56:03,661 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting func_to_recursive_line_0_to_41_0Err15ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:56:03,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:03,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1438111722, now seen corresponding path program 1 times [2023-11-29 01:56:03,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:03,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845526560] [2023-11-29 01:56:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:03,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:03,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:03,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752344998] [2023-11-29 01:56:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:03,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:03,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:03,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:03,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:56:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:03,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-29 01:56:03,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:03,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:03,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:03,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:56:04,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:56:04,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:56:04,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:56:04,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 01:56:04,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:56:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:04,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:56:04,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:04,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845526560] [2023-11-29 01:56:04,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:56:04,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752344998] [2023-11-29 01:56:04,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752344998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:04,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:04,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 01:56:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876662295] [2023-11-29 01:56:04,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:04,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:56:04,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:56:04,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:56:04,452 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:05,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:05,380 INFO L93 Difference]: Finished difference Result 266 states and 293 transitions. [2023-11-29 01:56:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:56:05,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-29 01:56:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:05,382 INFO L225 Difference]: With dead ends: 266 [2023-11-29 01:56:05,382 INFO L226 Difference]: Without dead ends: 265 [2023-11-29 01:56:05,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:56:05,383 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 193 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:05,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 954 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:56:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-11-29 01:56:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 188. [2023-11-29 01:56:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 125 states have (on average 1.608) internal successors, (201), 178 states have internal predecessors, (201), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:56:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 217 transitions. [2023-11-29 01:56:05,391 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 217 transitions. Word has length 24 [2023-11-29 01:56:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:05,391 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 217 transitions. [2023-11-29 01:56:05,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 217 transitions. [2023-11-29 01:56:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 01:56:05,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:05,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:05,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:56:05,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:56:05,593 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting func_to_recursive_line_0_to_41_0Err16ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:56:05,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:05,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1631790489, now seen corresponding path program 1 times [2023-11-29 01:56:05,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:05,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977260732] [2023-11-29 01:56:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:05,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:05,611 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:05,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45284984] [2023-11-29 01:56:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:05,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:05,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:05,612 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:05,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:56:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:05,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 01:56:05,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:05,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:05,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:05,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:06,053 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 [2023-11-29 01:56:06,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 01:56:06,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:56:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:06,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:56:06,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:06,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977260732] [2023-11-29 01:56:06,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:56:06,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45284984] [2023-11-29 01:56:06,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45284984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:06,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:06,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:56:06,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128952581] [2023-11-29 01:56:06,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:06,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:56:06,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:06,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:56:06,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:56:06,165 INFO L87 Difference]: Start difference. First operand 188 states and 217 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:06,636 INFO L93 Difference]: Finished difference Result 256 states and 283 transitions. [2023-11-29 01:56:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:56:06,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-29 01:56:06,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:06,638 INFO L225 Difference]: With dead ends: 256 [2023-11-29 01:56:06,638 INFO L226 Difference]: Without dead ends: 255 [2023-11-29 01:56:06,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:56:06,639 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 138 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:06,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 833 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:56:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-29 01:56:06,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 188. [2023-11-29 01:56:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 125 states have (on average 1.6) internal successors, (200), 178 states have internal predecessors, (200), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:56:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 216 transitions. [2023-11-29 01:56:06,647 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 216 transitions. Word has length 25 [2023-11-29 01:56:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:06,647 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 216 transitions. [2023-11-29 01:56:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 216 transitions. [2023-11-29 01:56:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 01:56:06,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:06,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:06,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:56:06,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:56:06,848 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting func_to_recursive_line_0_to_41_0Err17ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:56:06,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:06,849 INFO L85 PathProgramCache]: Analyzing trace with hash -954102324, now seen corresponding path program 1 times [2023-11-29 01:56:06,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:06,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765092254] [2023-11-29 01:56:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:06,862 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:06,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304692395] [2023-11-29 01:56:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:06,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:06,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:06,864 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:06,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:56:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:06,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 01:56:06,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:06,997 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 15 treesize of output 1 [2023-11-29 01:56:06,999 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 15 treesize of output 1 [2023-11-29 01:56:07,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:07,210 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 27 treesize of output 19 [2023-11-29 01:56:07,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 01:56:07,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:56:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:07,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:56:07,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:07,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765092254] [2023-11-29 01:56:07,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:56:07,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304692395] [2023-11-29 01:56:07,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304692395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:07,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:07,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:56:07,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825093211] [2023-11-29 01:56:07,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:07,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:56:07,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:07,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:56:07,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:56:07,311 INFO L87 Difference]: Start difference. First operand 188 states and 216 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:07,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:07,755 INFO L93 Difference]: Finished difference Result 255 states and 282 transitions. [2023-11-29 01:56:07,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:56:07,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 01:56:07,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:07,757 INFO L225 Difference]: With dead ends: 255 [2023-11-29 01:56:07,757 INFO L226 Difference]: Without dead ends: 254 [2023-11-29 01:56:07,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:56:07,758 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 132 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:07,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 753 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:56:07,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-29 01:56:07,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 188. [2023-11-29 01:56:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 125 states have (on average 1.592) internal successors, (199), 178 states have internal predecessors, (199), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:56:07,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 215 transitions. [2023-11-29 01:56:07,769 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 215 transitions. Word has length 26 [2023-11-29 01:56:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:07,770 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 215 transitions. [2023-11-29 01:56:07,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:56:07,770 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 215 transitions. [2023-11-29 01:56:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 01:56:07,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:07,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:07,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:56:07,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:07,971 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting func_to_recursive_line_0_to_41_0Err18ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:56:07,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:07,972 INFO L85 PathProgramCache]: Analyzing trace with hash 42268227, now seen corresponding path program 1 times [2023-11-29 01:56:07,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:07,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790056907] [2023-11-29 01:56:07,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:07,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:07,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:07,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568582172] [2023-11-29 01:56:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:07,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:07,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:07,989 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:07,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:56:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:08,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:56:08,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:08,155 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 [2023-11-29 01:56:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:08,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:56:08,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:08,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790056907] [2023-11-29 01:56:08,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:56:08,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568582172] [2023-11-29 01:56:08,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568582172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:08,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:08,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:56:08,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286345301] [2023-11-29 01:56:08,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:08,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:56:08,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:56:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:56:08,165 INFO L87 Difference]: Start difference. First operand 188 states and 215 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:56:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:08,274 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2023-11-29 01:56:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:56:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-11-29 01:56:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:08,276 INFO L225 Difference]: With dead ends: 188 [2023-11-29 01:56:08,276 INFO L226 Difference]: Without dead ends: 187 [2023-11-29 01:56:08,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:56:08,277 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 127 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:08,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 374 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:56:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-29 01:56:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-11-29 01:56:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 125 states have (on average 1.576) internal successors, (197), 177 states have internal predecessors, (197), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:56:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 213 transitions. [2023-11-29 01:56:08,289 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 213 transitions. Word has length 35 [2023-11-29 01:56:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:08,290 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 213 transitions. [2023-11-29 01:56:08,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:56:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 213 transitions. [2023-11-29 01:56:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 01:56:08,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:08,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:08,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:56:08,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:08,497 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting func_to_recursive_line_0_to_41_0Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:56:08,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:08,498 INFO L85 PathProgramCache]: Analyzing trace with hash 42268547, now seen corresponding path program 1 times [2023-11-29 01:56:08,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:08,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935075780] [2023-11-29 01:56:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:08,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:08,513 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:08,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784231990] [2023-11-29 01:56:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:08,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:08,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:08,515 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:08,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:56:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:08,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 01:56:08,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:08,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:08,829 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 [2023-11-29 01:56:08,832 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 [2023-11-29 01:56:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:08,843 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:56:08,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:08,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935075780] [2023-11-29 01:56:08,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:56:08,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784231990] [2023-11-29 01:56:08,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784231990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:08,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:08,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:56:08,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948550698] [2023-11-29 01:56:08,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:08,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:56:08,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:56:08,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:56:08,845 INFO L87 Difference]: Start difference. First operand 187 states and 213 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:56:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:09,152 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2023-11-29 01:56:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:56:09,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-11-29 01:56:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:09,154 INFO L225 Difference]: With dead ends: 187 [2023-11-29 01:56:09,154 INFO L226 Difference]: Without dead ends: 186 [2023-11-29 01:56:09,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:56:09,155 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 324 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:09,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 377 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:56:09,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-29 01:56:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2023-11-29 01:56:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.568) internal successors, (196), 176 states have internal predecessors, (196), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:56:09,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2023-11-29 01:56:09,167 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 35 [2023-11-29 01:56:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:09,167 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2023-11-29 01:56:09,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:56:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2023-11-29 01:56:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 01:56:09,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:09,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:09,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:56:09,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:09,369 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting func_to_recursive_line_0_to_41_0Err19ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:56:09,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:09,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1310315119, now seen corresponding path program 1 times [2023-11-29 01:56:09,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:09,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923074988] [2023-11-29 01:56:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:09,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:09,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854425149] [2023-11-29 01:56:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:09,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:09,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:09,386 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:09,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:56:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:09,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:56:09,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:09,553 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 [2023-11-29 01:56:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:09,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:56:09,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923074988] [2023-11-29 01:56:09,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:56:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854425149] [2023-11-29 01:56:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854425149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:09,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:09,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:56:09,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489909450] [2023-11-29 01:56:09,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:09,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:56:09,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:09,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:56:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:56:09,563 INFO L87 Difference]: Start difference. First operand 186 states and 212 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:56:09,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:09,668 INFO L93 Difference]: Finished difference Result 186 states and 212 transitions. [2023-11-29 01:56:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:56:09,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-11-29 01:56:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:09,669 INFO L225 Difference]: With dead ends: 186 [2023-11-29 01:56:09,669 INFO L226 Difference]: Without dead ends: 185 [2023-11-29 01:56:09,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:56:09,670 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 123 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:09,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 371 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:56:09,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-29 01:56:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-11-29 01:56:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 125 states have (on average 1.552) internal successors, (194), 175 states have internal predecessors, (194), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 01:56:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 210 transitions. [2023-11-29 01:56:09,678 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 210 transitions. Word has length 36 [2023-11-29 01:56:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:09,679 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 210 transitions. [2023-11-29 01:56:09,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:56:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 210 transitions. [2023-11-29 01:56:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 01:56:09,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:09,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:09,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:56:09,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 01:56:09,880 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting func_to_recursive_line_0_to_41_0Err23ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:56:09,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1310325049, now seen corresponding path program 1 times [2023-11-29 01:56:09,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:09,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227266558] [2023-11-29 01:56:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:09,896 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:09,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838192960] [2023-11-29 01:56:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:09,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:09,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:09,897 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:09,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:56:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:10,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 01:56:10,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:10,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:56:34,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 01:56:34,620 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 [2023-11-29 01:56:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:34,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:56:34,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227266558] [2023-11-29 01:56:34,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:56:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838192960] [2023-11-29 01:56:34,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838192960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:34,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:34,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 01:56:34,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438305695] [2023-11-29 01:56:34,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:34,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:56:34,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:34,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:56:34,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=142, Unknown=6, NotChecked=0, Total=182 [2023-11-29 01:56:34,648 INFO L87 Difference]: Start difference. First operand 185 states and 210 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:56:38,696 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] [2023-11-29 01:56:42,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:56:46,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:56:54,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:56:58,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 01:57:02,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 01:57:07,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 01:57:11,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 01:57:15,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:57:19,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:57:23,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:57:27,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:57:31,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:57:39,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:57:47,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:57:51,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:57:59,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:58:03,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:58:07,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:58:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:08,283 INFO L93 Difference]: Finished difference Result 270 states and 298 transitions. [2023-11-29 01:58:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:58:08,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-11-29 01:58:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:08,285 INFO L225 Difference]: With dead ends: 270 [2023-11-29 01:58:08,285 INFO L226 Difference]: Without dead ends: 269 [2023-11-29 01:58:08,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=117, Invalid=425, Unknown=10, NotChecked=0, Total=552 [2023-11-29 01:58:08,286 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 311 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 5 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:08,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 882 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 313 Invalid, 19 Unknown, 0 Unchecked, 77.2s Time] [2023-11-29 01:58:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-29 01:58:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 210. [2023-11-29 01:58:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 147 states have (on average 1.5578231292517006) internal successors, (229), 199 states have internal predecessors, (229), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-29 01:58:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2023-11-29 01:58:08,302 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 36 [2023-11-29 01:58:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:08,303 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2023-11-29 01:58:08,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2023-11-29 01:58:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 01:58:08,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:08,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:08,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:58:08,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 01:58:08,504 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:08,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1965353842, now seen corresponding path program 1 times [2023-11-29 01:58:08,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:08,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386914264] [2023-11-29 01:58:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:08,519 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:08,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154647353] [2023-11-29 01:58:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:08,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:08,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:08,520 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:08,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:58:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:08,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:58:08,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:08,705 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 11 treesize of output 7 [2023-11-29 01:58:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:08,768 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:08,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386914264] [2023-11-29 01:58:08,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154647353] [2023-11-29 01:58:08,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154647353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:08,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:08,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:58:08,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613880336] [2023-11-29 01:58:08,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:58:08,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:08,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:58:08,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:58:08,771 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:08,886 INFO L93 Difference]: Finished difference Result 259 states and 298 transitions. [2023-11-29 01:58:08,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:58:08,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-11-29 01:58:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:08,889 INFO L225 Difference]: With dead ends: 259 [2023-11-29 01:58:08,889 INFO L226 Difference]: Without dead ends: 257 [2023-11-29 01:58:08,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:58:08,890 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 90 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:08,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 379 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:08,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-11-29 01:58:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 217. [2023-11-29 01:58:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 152 states have (on average 1.5394736842105263) internal successors, (234), 203 states have internal predecessors, (234), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 257 transitions. [2023-11-29 01:58:08,908 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 257 transitions. Word has length 37 [2023-11-29 01:58:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:08,908 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 257 transitions. [2023-11-29 01:58:08,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 257 transitions. [2023-11-29 01:58:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 01:58:08,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:08,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:08,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:58:09,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:58:09,109 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting func_to_recursive_line_0_to_41_0Err20ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:09,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:09,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1965063109, now seen corresponding path program 1 times [2023-11-29 01:58:09,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:09,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471691780] [2023-11-29 01:58:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:09,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:09,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:09,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252603176] [2023-11-29 01:58:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:09,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:09,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:09,127 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:09,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:58:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:09,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 01:58:09,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:09,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:58:09,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:58:09,337 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 [2023-11-29 01:58:09,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:58:09,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-29 01:58:09,860 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 [2023-11-29 01:58:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:09,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:09,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:09,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471691780] [2023-11-29 01:58:09,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:09,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252603176] [2023-11-29 01:58:09,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252603176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:09,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:09,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:58:09,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140612160] [2023-11-29 01:58:09,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:09,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:58:09,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:58:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:58:09,891 INFO L87 Difference]: Start difference. First operand 217 states and 257 transitions. Second operand has 9 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:13,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:58:18,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:58:22,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:58:26,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:58:30,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 01:58:34,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:58:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:34,477 INFO L93 Difference]: Finished difference Result 263 states and 296 transitions. [2023-11-29 01:58:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:58:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-11-29 01:58:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:34,481 INFO L225 Difference]: With dead ends: 263 [2023-11-29 01:58:34,481 INFO L226 Difference]: Without dead ends: 262 [2023-11-29 01:58:34,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:58:34,482 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 102 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:34,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 823 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 6 Unknown, 0 Unchecked, 24.5s Time] [2023-11-29 01:58:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-29 01:58:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 217. [2023-11-29 01:58:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 152 states have (on average 1.5328947368421053) internal successors, (233), 203 states have internal predecessors, (233), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 256 transitions. [2023-11-29 01:58:34,494 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 256 transitions. Word has length 37 [2023-11-29 01:58:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:34,494 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 256 transitions. [2023-11-29 01:58:34,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 256 transitions. [2023-11-29 01:58:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 01:58:34,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:34,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:34,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:34,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:58:34,696 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting func_to_recursive_line_0_to_41_0Err24ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:34,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1965370949, now seen corresponding path program 1 times [2023-11-29 01:58:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:34,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130645599] [2023-11-29 01:58:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:34,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:34,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:34,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331024445] [2023-11-29 01:58:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:34,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:34,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:34,715 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:34,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:58:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:34,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 01:58:34,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:34,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:58:34,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:58:35,232 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 [2023-11-29 01:58:35,237 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 [2023-11-29 01:58:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:35,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:35,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:35,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130645599] [2023-11-29 01:58:35,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:35,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331024445] [2023-11-29 01:58:35,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331024445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:35,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:35,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:58:35,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128014565] [2023-11-29 01:58:35,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:35,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:58:35,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:35,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:58:35,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:58:35,265 INFO L87 Difference]: Start difference. First operand 217 states and 256 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:35,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:35,478 INFO L93 Difference]: Finished difference Result 217 states and 256 transitions. [2023-11-29 01:58:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:58:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-11-29 01:58:35,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:35,480 INFO L225 Difference]: With dead ends: 217 [2023-11-29 01:58:35,480 INFO L226 Difference]: Without dead ends: 216 [2023-11-29 01:58:35,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:58:35,481 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 208 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:35,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 343 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-29 01:58:35,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-11-29 01:58:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 152 states have (on average 1.519736842105263) internal successors, (231), 202 states have internal predecessors, (231), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 254 transitions. [2023-11-29 01:58:35,498 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 254 transitions. Word has length 37 [2023-11-29 01:58:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:35,498 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 254 transitions. [2023-11-29 01:58:35,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 254 transitions. [2023-11-29 01:58:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 01:58:35,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:35,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:35,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:35,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 01:58:35,699 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting func_to_recursive_line_0_to_41_0Err21ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:35,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 787414321, now seen corresponding path program 1 times [2023-11-29 01:58:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:35,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411218071] [2023-11-29 01:58:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:35,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:35,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:35,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139681337] [2023-11-29 01:58:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:35,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:35,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:35,719 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:35,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:58:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:35,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:58:35,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:35,901 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 [2023-11-29 01:58:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:35,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:35,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:35,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411218071] [2023-11-29 01:58:35,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:35,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139681337] [2023-11-29 01:58:35,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139681337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:35,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:35,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:58:35,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809323069] [2023-11-29 01:58:35,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:35,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:58:35,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:35,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:58:35,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:58:35,923 INFO L87 Difference]: Start difference. First operand 216 states and 254 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:35,991 INFO L93 Difference]: Finished difference Result 216 states and 254 transitions. [2023-11-29 01:58:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:58:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-11-29 01:58:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:35,992 INFO L225 Difference]: With dead ends: 216 [2023-11-29 01:58:35,992 INFO L226 Difference]: Without dead ends: 215 [2023-11-29 01:58:35,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:58:35,993 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:35,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 462 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:35,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-29 01:58:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2023-11-29 01:58:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 152 states have (on average 1.5) internal successors, (228), 201 states have internal predecessors, (228), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 251 transitions. [2023-11-29 01:58:36,004 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 251 transitions. Word has length 38 [2023-11-29 01:58:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:36,004 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 251 transitions. [2023-11-29 01:58:36,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 251 transitions. [2023-11-29 01:58:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 01:58:36,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:36,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:36,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 01:58:36,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 01:58:36,206 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting func_to_recursive_line_0_to_41_0Err25ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:36,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash 796957371, now seen corresponding path program 1 times [2023-11-29 01:58:36,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:36,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591059026] [2023-11-29 01:58:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:36,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:36,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:36,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588128878] [2023-11-29 01:58:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:36,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:36,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:36,227 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:36,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:58:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:36,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:58:36,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:36,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:36,633 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 [2023-11-29 01:58:36,637 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 [2023-11-29 01:58:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:36,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:36,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:36,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591059026] [2023-11-29 01:58:36,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:36,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588128878] [2023-11-29 01:58:36,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588128878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:36,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:36,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 01:58:36,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924207857] [2023-11-29 01:58:36,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:36,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:58:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:58:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:58:36,673 INFO L87 Difference]: Start difference. First operand 215 states and 251 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:40,744 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] [2023-11-29 01:58:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:41,201 INFO L93 Difference]: Finished difference Result 262 states and 290 transitions. [2023-11-29 01:58:41,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:58:41,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-11-29 01:58:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:41,203 INFO L225 Difference]: With dead ends: 262 [2023-11-29 01:58:41,203 INFO L226 Difference]: Without dead ends: 261 [2023-11-29 01:58:41,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:58:41,203 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 259 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:41,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 981 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 01:58:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-29 01:58:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2023-11-29 01:58:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 152 states have (on average 1.493421052631579) internal successors, (227), 201 states have internal predecessors, (227), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 250 transitions. [2023-11-29 01:58:41,217 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 250 transitions. Word has length 38 [2023-11-29 01:58:41,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:41,218 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 250 transitions. [2023-11-29 01:58:41,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 250 transitions. [2023-11-29 01:58:41,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 01:58:41,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:41,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:41,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:58:41,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 01:58:41,419 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:41,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:41,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1080563852, now seen corresponding path program 1 times [2023-11-29 01:58:41,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:41,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845595660] [2023-11-29 01:58:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:41,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:41,435 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:41,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890231605] [2023-11-29 01:58:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:41,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:41,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:41,436 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:41,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:58:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:41,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:58:41,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:41,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:41,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:41,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:41,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845595660] [2023-11-29 01:58:41,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:41,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890231605] [2023-11-29 01:58:41,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890231605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:41,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:41,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:58:41,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718735950] [2023-11-29 01:58:41,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:41,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:58:41,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:41,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:58:41,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:58:41,638 INFO L87 Difference]: Start difference. First operand 215 states and 250 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:41,728 INFO L93 Difference]: Finished difference Result 255 states and 289 transitions. [2023-11-29 01:58:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:58:41,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-11-29 01:58:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:41,730 INFO L225 Difference]: With dead ends: 255 [2023-11-29 01:58:41,731 INFO L226 Difference]: Without dead ends: 253 [2023-11-29 01:58:41,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:58:41,731 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 84 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:41,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 370 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-29 01:58:41,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 217. [2023-11-29 01:58:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 154 states have (on average 1.4870129870129871) internal successors, (229), 203 states have internal predecessors, (229), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:41,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 252 transitions. [2023-11-29 01:58:41,742 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 252 transitions. Word has length 39 [2023-11-29 01:58:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:41,742 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 252 transitions. [2023-11-29 01:58:41,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:41,742 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 252 transitions. [2023-11-29 01:58:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 01:58:41,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:41,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:41,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 01:58:41,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 01:58:41,943 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting func_to_recursive_line_0_to_41_0Err26ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:41,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1064125177, now seen corresponding path program 1 times [2023-11-29 01:58:41,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:41,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053677239] [2023-11-29 01:58:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:41,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:41,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:41,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074162127] [2023-11-29 01:58:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:41,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:41,968 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:41,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:58:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:42,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:58:42,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:42,127 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 [2023-11-29 01:58:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:42,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:42,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:42,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053677239] [2023-11-29 01:58:42,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:42,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074162127] [2023-11-29 01:58:42,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074162127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:42,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:42,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:58:42,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10313931] [2023-11-29 01:58:42,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:42,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:58:42,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:42,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:58:42,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:58:42,151 INFO L87 Difference]: Start difference. First operand 217 states and 252 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:42,218 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2023-11-29 01:58:42,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:58:42,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2023-11-29 01:58:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:42,220 INFO L225 Difference]: With dead ends: 217 [2023-11-29 01:58:42,220 INFO L226 Difference]: Without dead ends: 216 [2023-11-29 01:58:42,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:58:42,221 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 3 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:42,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 446 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-29 01:58:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-11-29 01:58:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 154 states have (on average 1.474025974025974) internal successors, (227), 202 states have internal predecessors, (227), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 250 transitions. [2023-11-29 01:58:42,231 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 250 transitions. Word has length 39 [2023-11-29 01:58:42,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:42,232 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 250 transitions. [2023-11-29 01:58:42,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:42,232 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 250 transitions. [2023-11-29 01:58:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 01:58:42,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:42,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:42,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 01:58:42,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:42,433 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting func_to_recursive_line_0_to_41_0Err30ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:42,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash 790921779, now seen corresponding path program 1 times [2023-11-29 01:58:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:42,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929286730] [2023-11-29 01:58:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:42,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:42,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:42,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402250773] [2023-11-29 01:58:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:42,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:42,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:42,451 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:42,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:58:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:42,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:58:42,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:42,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:42,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:42,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:42,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929286730] [2023-11-29 01:58:42,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:42,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402250773] [2023-11-29 01:58:42,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402250773] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:42,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:42,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:58:42,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773350061] [2023-11-29 01:58:42,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:42,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:58:42,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:58:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:58:42,759 INFO L87 Difference]: Start difference. First operand 216 states and 250 transitions. Second operand has 8 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:42,905 INFO L93 Difference]: Finished difference Result 257 states and 285 transitions. [2023-11-29 01:58:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:58:42,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-11-29 01:58:42,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:42,908 INFO L225 Difference]: With dead ends: 257 [2023-11-29 01:58:42,908 INFO L226 Difference]: Without dead ends: 256 [2023-11-29 01:58:42,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:58:42,908 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 147 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:42,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 727 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-29 01:58:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 216. [2023-11-29 01:58:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 154 states have (on average 1.4610389610389611) internal successors, (225), 202 states have internal predecessors, (225), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:42,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 248 transitions. [2023-11-29 01:58:42,926 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 248 transitions. Word has length 40 [2023-11-29 01:58:42,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:42,926 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 248 transitions. [2023-11-29 01:58:42,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 248 transitions. [2023-11-29 01:58:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 01:58:42,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:42,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:42,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:43,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 01:58:43,132 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting func_to_recursive_line_0_to_41_0Err27ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:43,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1371857981, now seen corresponding path program 1 times [2023-11-29 01:58:43,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:43,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717255057] [2023-11-29 01:58:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:43,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:43,147 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:43,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366068579] [2023-11-29 01:58:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:43,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:43,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:43,149 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:43,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:58:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:43,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 01:58:43,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:43,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:58:43,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:58:43,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:43,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:58:44,344 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 34 treesize of output 22 [2023-11-29 01:58:44,349 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 [2023-11-29 01:58:44,352 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 [2023-11-29 01:58:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:44,399 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:44,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:44,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717255057] [2023-11-29 01:58:44,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:44,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366068579] [2023-11-29 01:58:44,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366068579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:44,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:44,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:58:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108270721] [2023-11-29 01:58:44,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:44,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:58:44,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:58:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:58:44,401 INFO L87 Difference]: Start difference. First operand 216 states and 248 transitions. Second operand has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:48,886 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] [2023-11-29 01:58:52,960 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] [2023-11-29 01:58:53,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:53,244 INFO L93 Difference]: Finished difference Result 253 states and 283 transitions. [2023-11-29 01:58:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:58:53,245 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-11-29 01:58:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:53,246 INFO L225 Difference]: With dead ends: 253 [2023-11-29 01:58:53,246 INFO L226 Difference]: Without dead ends: 252 [2023-11-29 01:58:53,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:58:53,247 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 98 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:53,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 781 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2023-11-29 01:58:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-29 01:58:53,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 216. [2023-11-29 01:58:53,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 154 states have (on average 1.4545454545454546) internal successors, (224), 202 states have internal predecessors, (224), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 247 transitions. [2023-11-29 01:58:53,258 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 247 transitions. Word has length 40 [2023-11-29 01:58:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:53,258 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 247 transitions. [2023-11-29 01:58:53,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 247 transitions. [2023-11-29 01:58:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 01:58:53,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:53,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:53,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 01:58:53,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 01:58:53,460 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:53,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash 960228214, now seen corresponding path program 1 times [2023-11-29 01:58:53,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:53,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68691996] [2023-11-29 01:58:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:53,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:53,474 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:53,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336204529] [2023-11-29 01:58:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:53,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:53,476 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:53,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 01:58:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:53,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:58:53,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:53,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:53,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:53,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:53,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68691996] [2023-11-29 01:58:53,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:53,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336204529] [2023-11-29 01:58:53,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336204529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:53,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:53,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:58:53,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332327134] [2023-11-29 01:58:53,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:53,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:58:53,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:53,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:58:53,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:58:53,696 INFO L87 Difference]: Start difference. First operand 216 states and 247 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:53,918 INFO L93 Difference]: Finished difference Result 252 states and 282 transitions. [2023-11-29 01:58:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:58:53,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-11-29 01:58:53,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:53,922 INFO L225 Difference]: With dead ends: 252 [2023-11-29 01:58:53,922 INFO L226 Difference]: Without dead ends: 251 [2023-11-29 01:58:53,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:58:53,923 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 115 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:53,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 387 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:58:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-11-29 01:58:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 217. [2023-11-29 01:58:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 155 states have (on average 1.4516129032258065) internal successors, (225), 203 states have internal predecessors, (225), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 248 transitions. [2023-11-29 01:58:53,937 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 248 transitions. Word has length 41 [2023-11-29 01:58:53,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:53,937 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 248 transitions. [2023-11-29 01:58:53,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 248 transitions. [2023-11-29 01:58:53,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 01:58:53,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:53,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:53,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 01:58:54,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 01:58:54,138 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting func_to_recursive_line_0_to_41_0Err31ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:54,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:54,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1251228517, now seen corresponding path program 1 times [2023-11-29 01:58:54,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:54,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848749342] [2023-11-29 01:58:54,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:54,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:54,155 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:54,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463954068] [2023-11-29 01:58:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:54,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:54,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:54,157 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:54,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 01:58:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:54,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:58:54,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:54,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:54,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:54,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:54,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848749342] [2023-11-29 01:58:54,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:54,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463954068] [2023-11-29 01:58:54,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463954068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:54,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:54,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:58:54,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165152790] [2023-11-29 01:58:54,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:54,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:58:54,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:58:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:58:54,533 INFO L87 Difference]: Start difference. First operand 217 states and 248 transitions. Second operand has 8 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:54,726 INFO L93 Difference]: Finished difference Result 254 states and 281 transitions. [2023-11-29 01:58:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:58:54,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-11-29 01:58:54,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:54,728 INFO L225 Difference]: With dead ends: 254 [2023-11-29 01:58:54,728 INFO L226 Difference]: Without dead ends: 253 [2023-11-29 01:58:54,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:58:54,729 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 140 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:54,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 730 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:54,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-29 01:58:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 217. [2023-11-29 01:58:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 155 states have (on average 1.4387096774193548) internal successors, (223), 203 states have internal predecessors, (223), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 01:58:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 246 transitions. [2023-11-29 01:58:54,740 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 246 transitions. Word has length 41 [2023-11-29 01:58:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:54,740 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 246 transitions. [2023-11-29 01:58:54,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 246 transitions. [2023-11-29 01:58:54,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 01:58:54,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:54,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:54,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 01:58:54,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:54,942 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting func_to_recursive_line_0_to_41_0Err28ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:54,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:54,942 INFO L85 PathProgramCache]: Analyzing trace with hash -422075447, now seen corresponding path program 1 times [2023-11-29 01:58:54,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:54,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76844978] [2023-11-29 01:58:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:54,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:54,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:54,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381450174] [2023-11-29 01:58:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:54,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:54,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:54,961 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:54,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 01:58:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:55,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:58:55,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:55,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:55,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:55,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:55,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76844978] [2023-11-29 01:58:55,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:55,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381450174] [2023-11-29 01:58:55,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381450174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:55,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:55,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:58:55,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078071449] [2023-11-29 01:58:55,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:55,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:58:55,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:55,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:58:55,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:58:55,300 INFO L87 Difference]: Start difference. First operand 217 states and 246 transitions. Second operand has 8 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:55,472 INFO L93 Difference]: Finished difference Result 334 states and 346 transitions. [2023-11-29 01:58:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:58:55,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-11-29 01:58:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:55,475 INFO L225 Difference]: With dead ends: 334 [2023-11-29 01:58:55,475 INFO L226 Difference]: Without dead ends: 333 [2023-11-29 01:58:55,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:58:55,476 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 338 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:55,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 589 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-29 01:58:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 226. [2023-11-29 01:58:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 164 states have (on average 1.4268292682926829) internal successors, (234), 212 states have internal predecessors, (234), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2023-11-29 01:58:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2023-11-29 01:58:55,495 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 41 [2023-11-29 01:58:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:55,495 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2023-11-29 01:58:55,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2023-11-29 01:58:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 01:58:55,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:55,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:55,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 01:58:55,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:55,696 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:55,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash -297696298, now seen corresponding path program 1 times [2023-11-29 01:58:55,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:55,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093960213] [2023-11-29 01:58:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:55,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:55,708 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581406332] [2023-11-29 01:58:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:55,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:55,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:55,710 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:55,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 01:58:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:55,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:58:55,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:55,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:55,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:55,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:55,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093960213] [2023-11-29 01:58:55,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:55,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581406332] [2023-11-29 01:58:55,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581406332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:55,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:55,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:58:55,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838011857] [2023-11-29 01:58:55,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:55,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:58:55,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:55,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:58:55,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:58:55,931 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:56,103 INFO L93 Difference]: Finished difference Result 262 states and 291 transitions. [2023-11-29 01:58:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:58:56,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2023-11-29 01:58:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:56,105 INFO L225 Difference]: With dead ends: 262 [2023-11-29 01:58:56,105 INFO L226 Difference]: Without dead ends: 261 [2023-11-29 01:58:56,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:58:56,106 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 112 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:56,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 390 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-29 01:58:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 227. [2023-11-29 01:58:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 165 states have (on average 1.4242424242424243) internal successors, (235), 213 states have internal predecessors, (235), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2023-11-29 01:58:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 256 transitions. [2023-11-29 01:58:56,117 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 256 transitions. Word has length 42 [2023-11-29 01:58:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:56,117 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 256 transitions. [2023-11-29 01:58:56,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 256 transitions. [2023-11-29 01:58:56,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 01:58:56,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:56,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:56,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 01:58:56,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 01:58:56,318 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting func_to_recursive_line_0_to_41_0Err29ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:56,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:56,319 INFO L85 PathProgramCache]: Analyzing trace with hash -199436865, now seen corresponding path program 1 times [2023-11-29 01:58:56,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:56,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585949518] [2023-11-29 01:58:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:56,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:56,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:56,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074919828] [2023-11-29 01:58:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:56,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:56,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:56,332 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:56,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 01:58:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:56,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:58:56,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:56,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:56,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:56,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:56,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585949518] [2023-11-29 01:58:56,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:56,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074919828] [2023-11-29 01:58:56,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074919828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:56,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:56,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:58:56,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062127136] [2023-11-29 01:58:56,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:56,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:58:56,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:56,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:58:56,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:58:56,660 INFO L87 Difference]: Start difference. First operand 227 states and 256 transitions. Second operand has 8 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:56,812 INFO L93 Difference]: Finished difference Result 332 states and 343 transitions. [2023-11-29 01:58:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:58:56,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-11-29 01:58:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:56,815 INFO L225 Difference]: With dead ends: 332 [2023-11-29 01:58:56,815 INFO L226 Difference]: Without dead ends: 331 [2023-11-29 01:58:56,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:58:56,815 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 262 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:56,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 730 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-29 01:58:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 228. [2023-11-29 01:58:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 166 states have (on average 1.4156626506024097) internal successors, (235), 214 states have internal predecessors, (235), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2023-11-29 01:58:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 256 transitions. [2023-11-29 01:58:56,828 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 256 transitions. Word has length 42 [2023-11-29 01:58:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:56,828 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 256 transitions. [2023-11-29 01:58:56,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:58:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 256 transitions. [2023-11-29 01:58:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 01:58:56,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:56,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:56,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 01:58:57,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 01:58:57,032 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:57,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:57,032 INFO L85 PathProgramCache]: Analyzing trace with hash -638650504, now seen corresponding path program 1 times [2023-11-29 01:58:57,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:57,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14847360] [2023-11-29 01:58:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:57,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:57,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:57,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972433179] [2023-11-29 01:58:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:57,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:57,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:57,047 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:57,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 01:58:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:57,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:58:57,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:57,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:57,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:57,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:57,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:57,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14847360] [2023-11-29 01:58:57,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:57,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972433179] [2023-11-29 01:58:57,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972433179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:57,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:57,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:58:57,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301822775] [2023-11-29 01:58:57,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:57,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:58:57,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:57,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:58:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:58:57,309 INFO L87 Difference]: Start difference. First operand 228 states and 256 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:57,492 INFO L93 Difference]: Finished difference Result 262 states and 290 transitions. [2023-11-29 01:58:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:58:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-11-29 01:58:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:57,494 INFO L225 Difference]: With dead ends: 262 [2023-11-29 01:58:57,494 INFO L226 Difference]: Without dead ends: 261 [2023-11-29 01:58:57,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:58:57,495 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 142 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:57,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 494 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:58:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-29 01:58:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 229. [2023-11-29 01:58:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 167 states have (on average 1.4131736526946108) internal successors, (236), 215 states have internal predecessors, (236), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2023-11-29 01:58:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 257 transitions. [2023-11-29 01:58:57,510 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 257 transitions. Word has length 43 [2023-11-29 01:58:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:57,510 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 257 transitions. [2023-11-29 01:58:57,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 257 transitions. [2023-11-29 01:58:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 01:58:57,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:57,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:57,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 01:58:57,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 01:58:57,712 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:57,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:57,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1676671000, now seen corresponding path program 1 times [2023-11-29 01:58:57,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:57,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832119690] [2023-11-29 01:58:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:57,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:57,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915041250] [2023-11-29 01:58:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:57,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:57,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:57,731 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:57,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 01:58:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:57,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:58:57,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:57,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:58,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:58,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:58,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:58,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832119690] [2023-11-29 01:58:58,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:58,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915041250] [2023-11-29 01:58:58,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915041250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:58,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:58,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:58:58,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107001423] [2023-11-29 01:58:58,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:58,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:58:58,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:58,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:58:58,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:58:58,069 INFO L87 Difference]: Start difference. First operand 229 states and 257 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:58,306 INFO L93 Difference]: Finished difference Result 261 states and 289 transitions. [2023-11-29 01:58:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:58:58,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2023-11-29 01:58:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:58,308 INFO L225 Difference]: With dead ends: 261 [2023-11-29 01:58:58,308 INFO L226 Difference]: Without dead ends: 260 [2023-11-29 01:58:58,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:58:58,309 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 138 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:58,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 497 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:58:58,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-29 01:58:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 230. [2023-11-29 01:58:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 168 states have (on average 1.4107142857142858) internal successors, (237), 216 states have internal predecessors, (237), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2023-11-29 01:58:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 258 transitions. [2023-11-29 01:58:58,325 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 258 transitions. Word has length 44 [2023-11-29 01:58:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:58,326 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 258 transitions. [2023-11-29 01:58:58,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:58:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 258 transitions. [2023-11-29 01:58:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 01:58:58,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:58,327 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:58,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:58,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 01:58:58,527 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:58:58,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:58,528 INFO L85 PathProgramCache]: Analyzing trace with hash -624313573, now seen corresponding path program 1 times [2023-11-29 01:58:58,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:58,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071981469] [2023-11-29 01:58:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:58,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:58,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:58,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742285732] [2023-11-29 01:58:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:58,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:58,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:58,551 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:58,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 01:58:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:58,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 01:58:58,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:58,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:58:58,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:59,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:58:59,484 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 [2023-11-29 01:58:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:59,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:59,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:59,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071981469] [2023-11-29 01:58:59,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:59,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742285732] [2023-11-29 01:58:59,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742285732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:59,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:58:59,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-29 01:58:59,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569100314] [2023-11-29 01:58:59,969 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:59,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:58:59,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:58:59,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:58:59,970 INFO L87 Difference]: Start difference. First operand 230 states and 258 transitions. Second operand has 13 states, 11 states have (on average 3.727272727272727) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:59:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:00,693 INFO L93 Difference]: Finished difference Result 366 states and 416 transitions. [2023-11-29 01:59:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:59:00,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.727272727272727) internal successors, (41), 9 states have internal predecessors, (41), 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 45 [2023-11-29 01:59:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:00,696 INFO L225 Difference]: With dead ends: 366 [2023-11-29 01:59:00,697 INFO L226 Difference]: Without dead ends: 365 [2023-11-29 01:59:00,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:59:00,698 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 261 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:00,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1226 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:59:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-11-29 01:59:00,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 280. [2023-11-29 01:59:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 214 states have (on average 1.4532710280373833) internal successors, (311), 262 states have internal predecessors, (311), 10 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-29 01:59:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 337 transitions. [2023-11-29 01:59:00,724 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 337 transitions. Word has length 45 [2023-11-29 01:59:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:00,724 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 337 transitions. [2023-11-29 01:59:00,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.727272727272727) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:59:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 337 transitions. [2023-11-29 01:59:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 01:59:00,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:00,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:00,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 01:59:00,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 01:59:00,926 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:00,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:00,926 INFO L85 PathProgramCache]: Analyzing trace with hash 437193594, now seen corresponding path program 1 times [2023-11-29 01:59:00,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:00,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725259048] [2023-11-29 01:59:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:00,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:00,948 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:00,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851533848] [2023-11-29 01:59:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:00,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:00,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:00,950 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:00,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 01:59:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:01,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:59:01,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:01,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:01,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:01,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:01,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:01,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725259048] [2023-11-29 01:59:01,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:01,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851533848] [2023-11-29 01:59:01,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851533848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:01,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:01,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:59:01,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451392164] [2023-11-29 01:59:01,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:01,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:59:01,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:59:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:59:01,374 INFO L87 Difference]: Start difference. First operand 280 states and 337 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:01,680 INFO L93 Difference]: Finished difference Result 310 states and 366 transitions. [2023-11-29 01:59:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:59:01,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2023-11-29 01:59:01,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:01,683 INFO L225 Difference]: With dead ends: 310 [2023-11-29 01:59:01,683 INFO L226 Difference]: Without dead ends: 309 [2023-11-29 01:59:01,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:59:01,684 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 134 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:01,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 580 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:59:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-29 01:59:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 283. [2023-11-29 01:59:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 216 states have (on average 1.4490740740740742) internal successors, (313), 264 states have internal predecessors, (313), 10 states have call successors, (10), 8 states have call predecessors, (10), 11 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-29 01:59:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 340 transitions. [2023-11-29 01:59:01,699 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 340 transitions. Word has length 45 [2023-11-29 01:59:01,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:01,700 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 340 transitions. [2023-11-29 01:59:01,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 340 transitions. [2023-11-29 01:59:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 01:59:01,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:01,700 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:01,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-29 01:59:01,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 01:59:01,901 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:01,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:01,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2121115754, now seen corresponding path program 1 times [2023-11-29 01:59:01,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:01,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857914688] [2023-11-29 01:59:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:01,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:01,918 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:01,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731434101] [2023-11-29 01:59:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:01,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:01,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:01,919 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:01,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 01:59:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:02,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 01:59:02,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:02,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:02,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:02,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:59:02,792 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 [2023-11-29 01:59:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:02,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:03,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:03,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857914688] [2023-11-29 01:59:03,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:03,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731434101] [2023-11-29 01:59:03,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731434101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:03,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:59:03,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-11-29 01:59:03,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534993857] [2023-11-29 01:59:03,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:03,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:59:03,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:03,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:59:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:59:03,202 INFO L87 Difference]: Start difference. First operand 283 states and 340 transitions. Second operand has 19 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:06,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:06,501 INFO L93 Difference]: Finished difference Result 477 states and 555 transitions. [2023-11-29 01:59:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:59:06,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2023-11-29 01:59:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:06,505 INFO L225 Difference]: With dead ends: 477 [2023-11-29 01:59:06,505 INFO L226 Difference]: Without dead ends: 476 [2023-11-29 01:59:06,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2023-11-29 01:59:06,506 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 550 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:06,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1484 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 01:59:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-29 01:59:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 369. [2023-11-29 01:59:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 295 states have (on average 1.471186440677966) internal successors, (434), 345 states have internal predecessors, (434), 14 states have call successors, (14), 10 states have call predecessors, (14), 14 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2023-11-29 01:59:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 474 transitions. [2023-11-29 01:59:06,537 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 474 transitions. Word has length 46 [2023-11-29 01:59:06,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:06,537 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 474 transitions. [2023-11-29 01:59:06,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 474 transitions. [2023-11-29 01:59:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 01:59:06,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:06,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:06,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 01:59:06,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:06,739 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:06,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:06,740 INFO L85 PathProgramCache]: Analyzing trace with hash 668099674, now seen corresponding path program 1 times [2023-11-29 01:59:06,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:06,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746723673] [2023-11-29 01:59:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:06,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:06,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:06,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757406019] [2023-11-29 01:59:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:06,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:06,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:06,764 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:06,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 01:59:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:06,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:59:06,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:06,990 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 11 treesize of output 7 [2023-11-29 01:59:07,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:07,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:07,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:07,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746723673] [2023-11-29 01:59:07,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:07,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757406019] [2023-11-29 01:59:07,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757406019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:07,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:07,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:59:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129993522] [2023-11-29 01:59:07,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:07,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:59:07,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:59:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:59:07,101 INFO L87 Difference]: Start difference. First operand 369 states and 474 transitions. Second operand has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:07,371 INFO L93 Difference]: Finished difference Result 397 states and 501 transitions. [2023-11-29 01:59:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:59:07,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2023-11-29 01:59:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:07,374 INFO L225 Difference]: With dead ends: 397 [2023-11-29 01:59:07,374 INFO L226 Difference]: Without dead ends: 396 [2023-11-29 01:59:07,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:59:07,375 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 130 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:07,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 499 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:59:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-11-29 01:59:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 370. [2023-11-29 01:59:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 296 states have (on average 1.4695945945945945) internal successors, (435), 346 states have internal predecessors, (435), 14 states have call successors, (14), 10 states have call predecessors, (14), 14 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2023-11-29 01:59:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 475 transitions. [2023-11-29 01:59:07,405 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 475 transitions. Word has length 46 [2023-11-29 01:59:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:07,406 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 475 transitions. [2023-11-29 01:59:07,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 475 transitions. [2023-11-29 01:59:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 01:59:07,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:07,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:07,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 01:59:07,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-29 01:59:07,609 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:07,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:07,609 INFO L85 PathProgramCache]: Analyzing trace with hash -763746436, now seen corresponding path program 1 times [2023-11-29 01:59:07,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:07,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753891169] [2023-11-29 01:59:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:07,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:07,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:07,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220640017] [2023-11-29 01:59:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:07,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:07,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:07,629 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:07,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 01:59:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:07,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:59:07,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:07,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:07,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:08,383 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 [2023-11-29 01:59:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:08,407 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:08,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:08,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753891169] [2023-11-29 01:59:08,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:08,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220640017] [2023-11-29 01:59:08,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220640017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:08,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:08,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 01:59:08,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984951895] [2023-11-29 01:59:08,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:08,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:59:08,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:08,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:59:08,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:59:08,409 INFO L87 Difference]: Start difference. First operand 370 states and 475 transitions. Second operand has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:08,885 INFO L93 Difference]: Finished difference Result 396 states and 500 transitions. [2023-11-29 01:59:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:59:08,886 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2023-11-29 01:59:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:08,888 INFO L225 Difference]: With dead ends: 396 [2023-11-29 01:59:08,888 INFO L226 Difference]: Without dead ends: 395 [2023-11-29 01:59:08,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:59:08,889 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 266 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:08,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 537 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:59:08,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-29 01:59:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 371. [2023-11-29 01:59:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 297 states have (on average 1.468013468013468) internal successors, (436), 347 states have internal predecessors, (436), 14 states have call successors, (14), 10 states have call predecessors, (14), 14 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2023-11-29 01:59:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 476 transitions. [2023-11-29 01:59:08,909 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 476 transitions. Word has length 47 [2023-11-29 01:59:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:08,909 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 476 transitions. [2023-11-29 01:59:08,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:08,910 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 476 transitions. [2023-11-29 01:59:08,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 01:59:08,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:08,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:08,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 01:59:09,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:09,111 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:09,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:09,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2093664412, now seen corresponding path program 1 times [2023-11-29 01:59:09,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:09,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456458423] [2023-11-29 01:59:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:09,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:09,131 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:09,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170098124] [2023-11-29 01:59:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:09,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:09,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:09,133 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:09,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 01:59:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:09,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 01:59:09,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:09,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:09,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:09,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:09,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-29 01:59:09,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:09,920 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 [2023-11-29 01:59:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:09,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:09,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:09,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456458423] [2023-11-29 01:59:09,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:09,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170098124] [2023-11-29 01:59:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170098124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:09,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:09,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 01:59:09,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403030405] [2023-11-29 01:59:09,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:09,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:59:09,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:59:09,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:59:09,955 INFO L87 Difference]: Start difference. First operand 371 states and 476 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:10,523 INFO L93 Difference]: Finished difference Result 395 states and 499 transitions. [2023-11-29 01:59:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:59:10,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2023-11-29 01:59:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:10,526 INFO L225 Difference]: With dead ends: 395 [2023-11-29 01:59:10,526 INFO L226 Difference]: Without dead ends: 394 [2023-11-29 01:59:10,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:59:10,527 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 270 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:10,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 504 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:59:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-11-29 01:59:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 372. [2023-11-29 01:59:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 298 states have (on average 1.4664429530201342) internal successors, (437), 348 states have internal predecessors, (437), 14 states have call successors, (14), 10 states have call predecessors, (14), 14 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2023-11-29 01:59:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 477 transitions. [2023-11-29 01:59:10,558 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 477 transitions. Word has length 48 [2023-11-29 01:59:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:10,558 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 477 transitions. [2023-11-29 01:59:10,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 477 transitions. [2023-11-29 01:59:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 01:59:10,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:10,559 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:10,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 01:59:10,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 01:59:10,760 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting func_to_recursive_line_0_to_41_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:10,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:10,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1694359841, now seen corresponding path program 1 times [2023-11-29 01:59:10,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:10,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408407920] [2023-11-29 01:59:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:10,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:10,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:10,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454548371] [2023-11-29 01:59:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:10,783 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:10,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 01:59:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:11,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 01:59:11,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:11,043 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 1 [2023-11-29 01:59:11,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:11,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:59:11,714 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 [2023-11-29 01:59:11,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:11,782 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 [2023-11-29 01:59:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:11,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:13,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:13,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408407920] [2023-11-29 01:59:13,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:13,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454548371] [2023-11-29 01:59:13,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454548371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:13,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:59:13,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-29 01:59:13,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188028858] [2023-11-29 01:59:13,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:13,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:59:13,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:59:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:59:13,537 INFO L87 Difference]: Start difference. First operand 372 states and 477 transitions. Second operand has 23 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:24,420 INFO L93 Difference]: Finished difference Result 474 states and 555 transitions. [2023-11-29 01:59:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 01:59:24,420 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2023-11-29 01:59:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:24,424 INFO L225 Difference]: With dead ends: 474 [2023-11-29 01:59:24,424 INFO L226 Difference]: Without dead ends: 472 [2023-11-29 01:59:24,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 01:59:24,425 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 913 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:24,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 1434 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-11-29 01:59:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-11-29 01:59:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 372. [2023-11-29 01:59:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 298 states have (on average 1.4463087248322148) internal successors, (431), 348 states have internal predecessors, (431), 14 states have call successors, (14), 10 states have call predecessors, (14), 14 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2023-11-29 01:59:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 471 transitions. [2023-11-29 01:59:24,456 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 471 transitions. Word has length 49 [2023-11-29 01:59:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:24,456 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 471 transitions. [2023-11-29 01:59:24,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 471 transitions. [2023-11-29 01:59:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 01:59:24,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:24,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:24,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 01:59:24,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 01:59:24,658 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:24,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:24,658 INFO L85 PathProgramCache]: Analyzing trace with hash 479087486, now seen corresponding path program 1 times [2023-11-29 01:59:24,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:24,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507471409] [2023-11-29 01:59:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:24,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:24,679 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:24,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624976652] [2023-11-29 01:59:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:24,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:24,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:24,681 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:24,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 01:59:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:24,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:59:24,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:25,044 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 [2023-11-29 01:59:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:25,054 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:25,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:25,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507471409] [2023-11-29 01:59:25,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:25,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624976652] [2023-11-29 01:59:25,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624976652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:25,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:25,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:59:25,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900632290] [2023-11-29 01:59:25,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:25,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:59:25,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:59:25,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:59:25,056 INFO L87 Difference]: Start difference. First operand 372 states and 471 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:25,196 INFO L93 Difference]: Finished difference Result 372 states and 471 transitions. [2023-11-29 01:59:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:59:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2023-11-29 01:59:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:25,199 INFO L225 Difference]: With dead ends: 372 [2023-11-29 01:59:25,199 INFO L226 Difference]: Without dead ends: 371 [2023-11-29 01:59:25,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:59:25,200 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 96 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:25,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 343 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:59:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-29 01:59:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-11-29 01:59:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 298 states have (on average 1.4429530201342282) internal successors, (430), 347 states have internal predecessors, (430), 14 states have call successors, (14), 10 states have call predecessors, (14), 14 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2023-11-29 01:59:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 470 transitions. [2023-11-29 01:59:25,223 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 470 transitions. Word has length 49 [2023-11-29 01:59:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:25,224 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 470 transitions. [2023-11-29 01:59:25,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 470 transitions. [2023-11-29 01:59:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 01:59:25,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:25,224 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:25,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 01:59:25,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 01:59:25,425 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting func_to_recursive_line_0_to_41_0Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:25,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash -985547474, now seen corresponding path program 1 times [2023-11-29 01:59:25,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:25,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350339648] [2023-11-29 01:59:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:25,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:25,444 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:25,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885673863] [2023-11-29 01:59:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:25,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:25,445 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:25,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 01:59:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:25,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 01:59:25,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:25,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:25,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:26,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:59:26,253 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 [2023-11-29 01:59:26,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:26,311 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 15 treesize of output 7 [2023-11-29 01:59:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:26,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:27,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:27,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350339648] [2023-11-29 01:59:27,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:27,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885673863] [2023-11-29 01:59:27,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885673863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:27,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:59:27,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-29 01:59:27,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535241827] [2023-11-29 01:59:27,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:27,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:59:27,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:27,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:59:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:59:27,085 INFO L87 Difference]: Start difference. First operand 371 states and 470 transitions. Second operand has 23 states, 20 states have (on average 4.6) internal successors, (92), 19 states have internal predecessors, (92), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:36,547 INFO L93 Difference]: Finished difference Result 469 states and 547 transitions. [2023-11-29 01:59:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 01:59:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.6) internal successors, (92), 19 states have internal predecessors, (92), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-11-29 01:59:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:36,551 INFO L225 Difference]: With dead ends: 469 [2023-11-29 01:59:36,551 INFO L226 Difference]: Without dead ends: 468 [2023-11-29 01:59:36,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 01:59:36,553 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 804 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:36,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 1605 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-11-29 01:59:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-29 01:59:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 371. [2023-11-29 01:59:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 298 states have (on average 1.429530201342282) internal successors, (426), 347 states have internal predecessors, (426), 14 states have call successors, (14), 10 states have call predecessors, (14), 14 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2023-11-29 01:59:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 466 transitions. [2023-11-29 01:59:36,577 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 466 transitions. Word has length 50 [2023-11-29 01:59:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:36,577 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 466 transitions. [2023-11-29 01:59:36,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.6) internal successors, (92), 19 states have internal predecessors, (92), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 466 transitions. [2023-11-29 01:59:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 01:59:36,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:36,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:36,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 01:59:36,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 01:59:36,779 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:36,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1966810334, now seen corresponding path program 1 times [2023-11-29 01:59:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:36,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81223932] [2023-11-29 01:59:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:36,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:36,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476052318] [2023-11-29 01:59:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:36,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:36,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:36,797 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:36,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 01:59:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:37,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:59:37,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:37,143 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 [2023-11-29 01:59:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:37,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:37,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:37,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81223932] [2023-11-29 01:59:37,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:37,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476052318] [2023-11-29 01:59:37,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476052318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:37,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:37,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:59:37,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492546237] [2023-11-29 01:59:37,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:37,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:59:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:37,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:59:37,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:59:37,160 INFO L87 Difference]: Start difference. First operand 371 states and 466 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:37,305 INFO L93 Difference]: Finished difference Result 371 states and 466 transitions. [2023-11-29 01:59:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:59:37,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-11-29 01:59:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:37,308 INFO L225 Difference]: With dead ends: 371 [2023-11-29 01:59:37,308 INFO L226 Difference]: Without dead ends: 370 [2023-11-29 01:59:37,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:59:37,309 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 124 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:37,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 343 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:59:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-11-29 01:59:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2023-11-29 01:59:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 298 states have (on average 1.4261744966442953) internal successors, (425), 346 states have internal predecessors, (425), 14 states have call successors, (14), 10 states have call predecessors, (14), 14 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2023-11-29 01:59:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 465 transitions. [2023-11-29 01:59:37,332 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 465 transitions. Word has length 50 [2023-11-29 01:59:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:37,332 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 465 transitions. [2023-11-29 01:59:37,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 465 transitions. [2023-11-29 01:59:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 01:59:37,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:37,333 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:37,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 01:59:37,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 01:59:37,534 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting func_to_recursive_line_0_to_41_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:37,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2065085393, now seen corresponding path program 1 times [2023-11-29 01:59:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:37,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268225078] [2023-11-29 01:59:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:37,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:37,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:37,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631452982] [2023-11-29 01:59:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:37,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:37,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:37,554 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:37,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 01:59:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:37,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 01:59:37,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:37,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:37,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:37,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:38,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:59:38,657 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 [2023-11-29 01:59:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:38,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:39,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:39,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268225078] [2023-11-29 01:59:39,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:39,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631452982] [2023-11-29 01:59:39,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631452982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:39,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:59:39,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-29 01:59:39,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982603358] [2023-11-29 01:59:39,314 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:39,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:59:39,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:39,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:59:39,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:59:39,316 INFO L87 Difference]: Start difference. First operand 370 states and 465 transitions. Second operand has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:59:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:40,350 INFO L93 Difference]: Finished difference Result 489 states and 605 transitions. [2023-11-29 01:59:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:59:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 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 51 [2023-11-29 01:59:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:40,353 INFO L225 Difference]: With dead ends: 489 [2023-11-29 01:59:40,353 INFO L226 Difference]: Without dead ends: 488 [2023-11-29 01:59:40,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:59:40,354 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 282 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:40,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1370 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:59:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-11-29 01:59:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 435. [2023-11-29 01:59:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 356 states have (on average 1.449438202247191) internal successors, (516), 406 states have internal predecessors, (516), 18 states have call successors, (18), 12 states have call predecessors, (18), 17 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2023-11-29 01:59:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 568 transitions. [2023-11-29 01:59:40,380 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 568 transitions. Word has length 51 [2023-11-29 01:59:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:40,380 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 568 transitions. [2023-11-29 01:59:40,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:59:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 568 transitions. [2023-11-29 01:59:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 01:59:40,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:40,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:40,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 01:59:40,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 01:59:40,581 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:40,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:40,582 INFO L85 PathProgramCache]: Analyzing trace with hash 841578368, now seen corresponding path program 1 times [2023-11-29 01:59:40,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:40,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739223261] [2023-11-29 01:59:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:40,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:40,596 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:40,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976155031] [2023-11-29 01:59:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:40,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:40,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:40,597 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:40,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 01:59:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:40,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 01:59:40,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:40,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:40,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:40,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:40,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:41,574 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 [2023-11-29 01:59:41,835 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 [2023-11-29 01:59:41,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:41,915 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 26 treesize of output 26 [2023-11-29 01:59:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:41,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:41,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:41,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739223261] [2023-11-29 01:59:41,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:41,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976155031] [2023-11-29 01:59:41,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976155031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:41,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:41,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-29 01:59:41,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242638580] [2023-11-29 01:59:41,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:41,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:59:41,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:41,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:59:41,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:59:41,976 INFO L87 Difference]: Start difference. First operand 435 states and 568 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:43,356 INFO L93 Difference]: Finished difference Result 462 states and 594 transitions. [2023-11-29 01:59:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:59:43,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2023-11-29 01:59:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:43,360 INFO L225 Difference]: With dead ends: 462 [2023-11-29 01:59:43,360 INFO L226 Difference]: Without dead ends: 461 [2023-11-29 01:59:43,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:59:43,361 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 266 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:43,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 710 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:59:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2023-11-29 01:59:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 438. [2023-11-29 01:59:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 359 states have (on average 1.4456824512534818) internal successors, (519), 409 states have internal predecessors, (519), 18 states have call successors, (18), 12 states have call predecessors, (18), 17 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2023-11-29 01:59:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 571 transitions. [2023-11-29 01:59:43,388 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 571 transitions. Word has length 51 [2023-11-29 01:59:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:43,388 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 571 transitions. [2023-11-29 01:59:43,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 571 transitions. [2023-11-29 01:59:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 01:59:43,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:43,389 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:43,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 01:59:43,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:43,590 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting func_to_recursive_line_0_to_41_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:43,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:43,590 INFO L85 PathProgramCache]: Analyzing trace with hash 406862298, now seen corresponding path program 1 times [2023-11-29 01:59:43,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:43,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972585710] [2023-11-29 01:59:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:43,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:43,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:43,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595303285] [2023-11-29 01:59:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:43,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:43,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:43,610 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:43,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 01:59:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:43,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 01:59:43,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:43,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:43,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:44,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:59:44,557 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 [2023-11-29 01:59:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:44,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:45,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972585710] [2023-11-29 01:59:45,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595303285] [2023-11-29 01:59:45,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595303285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:45,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:59:45,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-29 01:59:45,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880110047] [2023-11-29 01:59:45,012 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:45,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:59:45,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:45,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:59:45,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:59:45,013 INFO L87 Difference]: Start difference. First operand 438 states and 571 transitions. Second operand has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:59:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:45,562 INFO L93 Difference]: Finished difference Result 630 states and 770 transitions. [2023-11-29 01:59:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:59:45,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 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 52 [2023-11-29 01:59:45,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:45,566 INFO L225 Difference]: With dead ends: 630 [2023-11-29 01:59:45,566 INFO L226 Difference]: Without dead ends: 629 [2023-11-29 01:59:45,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:59:45,566 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 454 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:45,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 921 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:59:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-11-29 01:59:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 503. [2023-11-29 01:59:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 417 states have (on average 1.4580335731414868) internal successors, (608), 469 states have internal predecessors, (608), 22 states have call successors, (22), 14 states have call predecessors, (22), 20 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-11-29 01:59:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 674 transitions. [2023-11-29 01:59:45,601 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 674 transitions. Word has length 52 [2023-11-29 01:59:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:45,601 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 674 transitions. [2023-11-29 01:59:45,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:59:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 674 transitions. [2023-11-29 01:59:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 01:59:45,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:45,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:45,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 01:59:45,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:45,802 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:45,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash 319125792, now seen corresponding path program 1 times [2023-11-29 01:59:45,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:45,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310885841] [2023-11-29 01:59:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:45,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:45,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186169687] [2023-11-29 01:59:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:45,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:45,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:45,823 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:45,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 01:59:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:46,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 01:59:46,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:46,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:46,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:46,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:46,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:46,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:46,695 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 [2023-11-29 01:59:46,743 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 15 treesize of output 7 [2023-11-29 01:59:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:46,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:46,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310885841] [2023-11-29 01:59:46,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186169687] [2023-11-29 01:59:46,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186169687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:46,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:46,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 01:59:46,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306700461] [2023-11-29 01:59:46,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:46,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:59:46,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:46,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:59:46,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:59:46,809 INFO L87 Difference]: Start difference. First operand 503 states and 674 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:47,601 INFO L93 Difference]: Finished difference Result 529 states and 701 transitions. [2023-11-29 01:59:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:59:47,602 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2023-11-29 01:59:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:47,605 INFO L225 Difference]: With dead ends: 529 [2023-11-29 01:59:47,605 INFO L226 Difference]: Without dead ends: 528 [2023-11-29 01:59:47,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:59:47,606 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 231 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:47,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 453 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:59:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-11-29 01:59:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 504. [2023-11-29 01:59:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 418 states have (on average 1.4569377990430623) internal successors, (609), 470 states have internal predecessors, (609), 22 states have call successors, (22), 14 states have call predecessors, (22), 20 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-11-29 01:59:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 675 transitions. [2023-11-29 01:59:47,651 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 675 transitions. Word has length 52 [2023-11-29 01:59:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:47,651 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 675 transitions. [2023-11-29 01:59:47,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 675 transitions. [2023-11-29 01:59:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 01:59:47,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:47,652 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:47,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 01:59:47,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:47,852 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting func_to_recursive_line_0_to_41_0Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:47,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:47,853 INFO L85 PathProgramCache]: Analyzing trace with hash -48315741, now seen corresponding path program 1 times [2023-11-29 01:59:47,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:47,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045590778] [2023-11-29 01:59:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:47,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:47,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:47,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731771752] [2023-11-29 01:59:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:47,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:47,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:47,873 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:47,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 01:59:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:48,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 01:59:48,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:48,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:48,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:48,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:48,778 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 [2023-11-29 01:59:48,812 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 13 treesize of output 9 [2023-11-29 01:59:48,934 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 [2023-11-29 01:59:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:49,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:53,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045590778] [2023-11-29 01:59:53,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731771752] [2023-11-29 01:59:53,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731771752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:53,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:59:53,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-29 01:59:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6762707] [2023-11-29 01:59:53,688 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:53,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:59:53,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:59:53,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:59:53,688 INFO L87 Difference]: Start difference. First operand 504 states and 675 transitions. Second operand has 14 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:59:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:55,550 INFO L93 Difference]: Finished difference Result 546 states and 701 transitions. [2023-11-29 01:59:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:59:55,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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 53 [2023-11-29 01:59:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:55,554 INFO L225 Difference]: With dead ends: 546 [2023-11-29 01:59:55,554 INFO L226 Difference]: Without dead ends: 545 [2023-11-29 01:59:55,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:59:55,554 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 311 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:55,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1254 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 01:59:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-11-29 01:59:55,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 504. [2023-11-29 01:59:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 418 states have (on average 1.4497607655502391) internal successors, (606), 470 states have internal predecessors, (606), 22 states have call successors, (22), 14 states have call predecessors, (22), 20 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-11-29 01:59:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 672 transitions. [2023-11-29 01:59:55,604 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 672 transitions. Word has length 53 [2023-11-29 01:59:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:55,604 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 672 transitions. [2023-11-29 01:59:55,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:59:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 672 transitions. [2023-11-29 01:59:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 01:59:55,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:55,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:55,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 01:59:55,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:55,806 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:55,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1302965122, now seen corresponding path program 1 times [2023-11-29 01:59:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:55,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539414538] [2023-11-29 01:59:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:55,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:55,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:55,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685740317] [2023-11-29 01:59:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:55,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:55,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:55,826 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:55,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 01:59:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:56,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:59:56,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:56,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:56,078 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 15 [2023-11-29 01:59:56,191 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 [2023-11-29 01:59:56,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 01:59:56,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:59:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:56,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:56,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:56,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539414538] [2023-11-29 01:59:56,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:56,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685740317] [2023-11-29 01:59:56,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685740317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:56,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:56,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:59:56,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540657837] [2023-11-29 01:59:56,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:56,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:59:56,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:56,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:59:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:59:56,299 INFO L87 Difference]: Start difference. First operand 504 states and 672 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:56,847 INFO L93 Difference]: Finished difference Result 520 states and 687 transitions. [2023-11-29 01:59:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:59:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2023-11-29 01:59:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:56,851 INFO L225 Difference]: With dead ends: 520 [2023-11-29 01:59:56,851 INFO L226 Difference]: Without dead ends: 519 [2023-11-29 01:59:56,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:59:56,852 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 87 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:56,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 594 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:59:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-11-29 01:59:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 505. [2023-11-29 01:59:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 419 states have (on average 1.4486873508353222) internal successors, (607), 471 states have internal predecessors, (607), 22 states have call successors, (22), 14 states have call predecessors, (22), 20 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-11-29 01:59:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 673 transitions. [2023-11-29 01:59:56,884 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 673 transitions. Word has length 53 [2023-11-29 01:59:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:56,885 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 673 transitions. [2023-11-29 01:59:56,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:59:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 673 transitions. [2023-11-29 01:59:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 01:59:56,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:56,885 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:56,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 01:59:57,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-29 01:59:57,086 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting func_to_recursive_line_0_to_41_0Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 01:59:57,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:57,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1497787918, now seen corresponding path program 1 times [2023-11-29 01:59:57,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:57,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432973899] [2023-11-29 01:59:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:57,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:57,102 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:57,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195738915] [2023-11-29 01:59:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:57,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:57,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:57,104 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:57,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 01:59:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:57,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-29 01:59:57,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:57,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:57,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:57,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:58,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:59:58,349 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 [2023-11-29 01:59:58,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:59:58,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:58,441 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 [2023-11-29 01:59:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:58,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:38,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:38,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432973899] [2023-11-29 02:00:38,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:38,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195738915] [2023-11-29 02:00:38,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195738915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:38,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:38,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-29 02:00:38,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530954929] [2023-11-29 02:00:38,096 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:38,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:00:38,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:38,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:00:38,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=392, Unknown=10, NotChecked=0, Total=462 [2023-11-29 02:00:38,097 INFO L87 Difference]: Start difference. First operand 505 states and 673 transitions. Second operand has 14 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:00:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:40,472 INFO L93 Difference]: Finished difference Result 532 states and 686 transitions. [2023-11-29 02:00:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:00:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 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 54 [2023-11-29 02:00:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:40,475 INFO L225 Difference]: With dead ends: 532 [2023-11-29 02:00:40,476 INFO L226 Difference]: Without dead ends: 531 [2023-11-29 02:00:40,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=129, Invalid=673, Unknown=10, NotChecked=0, Total=812 [2023-11-29 02:00:40,476 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 308 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:40,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1035 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:00:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2023-11-29 02:00:40,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 505. [2023-11-29 02:00:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 419 states have (on average 1.4463007159904535) internal successors, (606), 471 states have internal predecessors, (606), 22 states have call successors, (22), 14 states have call predecessors, (22), 20 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-11-29 02:00:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 672 transitions. [2023-11-29 02:00:40,511 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 672 transitions. Word has length 54 [2023-11-29 02:00:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:40,512 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 672 transitions. [2023-11-29 02:00:40,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:00:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 672 transitions. [2023-11-29 02:00:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 02:00:40,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:40,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:40,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 02:00:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:40,713 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:00:40,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:40,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1737213282, now seen corresponding path program 1 times [2023-11-29 02:00:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:40,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778770081] [2023-11-29 02:00:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:40,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:40,731 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:40,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974049276] [2023-11-29 02:00:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:40,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:40,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:40,733 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:40,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 02:00:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:40,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:00:40,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:41,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:00:41,020 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 15 [2023-11-29 02:00:41,111 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 [2023-11-29 02:00:41,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 02:00:41,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:00:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:41,230 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:41,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778770081] [2023-11-29 02:00:41,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974049276] [2023-11-29 02:00:41,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974049276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:41,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:41,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 02:00:41,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558543109] [2023-11-29 02:00:41,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:41,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:00:41,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:41,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:00:41,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:00:41,233 INFO L87 Difference]: Start difference. First operand 505 states and 672 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:00:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:41,696 INFO L93 Difference]: Finished difference Result 519 states and 685 transitions. [2023-11-29 02:00:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:00:41,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-11-29 02:00:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:41,700 INFO L225 Difference]: With dead ends: 519 [2023-11-29 02:00:41,700 INFO L226 Difference]: Without dead ends: 518 [2023-11-29 02:00:41,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:00:41,701 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 82 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:41,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 529 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:00:41,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-11-29 02:00:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 506. [2023-11-29 02:00:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 420 states have (on average 1.4452380952380952) internal successors, (607), 472 states have internal predecessors, (607), 22 states have call successors, (22), 14 states have call predecessors, (22), 20 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-11-29 02:00:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 673 transitions. [2023-11-29 02:00:41,738 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 673 transitions. Word has length 54 [2023-11-29 02:00:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:41,738 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 673 transitions. [2023-11-29 02:00:41,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:00:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 673 transitions. [2023-11-29 02:00:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 02:00:41,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:41,739 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:41,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-29 02:00:41,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:41,939 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting func_to_recursive_line_0_to_41_0Err10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:00:41,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:41,939 INFO L85 PathProgramCache]: Analyzing trace with hash 813214853, now seen corresponding path program 1 times [2023-11-29 02:00:41,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:41,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737237945] [2023-11-29 02:00:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:41,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:41,957 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:41,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209836836] [2023-11-29 02:00:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:41,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:41,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:41,958 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:41,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-29 02:00:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:42,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-29 02:00:42,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:42,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:00:42,215 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 [2023-11-29 02:00:42,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:00:42,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:00:43,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:00:43,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 02:00:43,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:00:43,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:00:43,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 02:00:43,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:00:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:43,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:25,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:25,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737237945] [2023-11-29 02:01:25,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:01:25,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209836836] [2023-11-29 02:01:25,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209836836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:01:25,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:01:25,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 02:01:25,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34753047] [2023-11-29 02:01:25,334 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:25,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:01:25,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:25,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:01:25,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=574, Unknown=10, NotChecked=0, Total=650 [2023-11-29 02:01:25,336 INFO L87 Difference]: Start difference. First operand 506 states and 673 transitions. Second operand has 17 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:01:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:01:27,481 INFO L93 Difference]: Finished difference Result 530 states and 684 transitions. [2023-11-29 02:01:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:01:27,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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 55 [2023-11-29 02:01:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:01:27,484 INFO L225 Difference]: With dead ends: 530 [2023-11-29 02:01:27,484 INFO L226 Difference]: Without dead ends: 529 [2023-11-29 02:01:27,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=151, Invalid=1099, Unknown=10, NotChecked=0, Total=1260 [2023-11-29 02:01:27,485 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 327 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:01:27,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1172 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 02:01:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-11-29 02:01:27,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 506. [2023-11-29 02:01:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 420 states have (on average 1.4428571428571428) internal successors, (606), 472 states have internal predecessors, (606), 22 states have call successors, (22), 14 states have call predecessors, (22), 20 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-11-29 02:01:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 672 transitions. [2023-11-29 02:01:27,539 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 672 transitions. Word has length 55 [2023-11-29 02:01:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:01:27,540 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 672 transitions. [2023-11-29 02:01:27,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:01:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 672 transitions. [2023-11-29 02:01:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 02:01:27,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:01:27,541 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:27,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-29 02:01:27,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-29 02:01:27,741 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting func_to_recursive_line_0_to_41_0Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:01:27,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash 437053171, now seen corresponding path program 1 times [2023-11-29 02:01:27,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:27,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278233262] [2023-11-29 02:01:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:27,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:27,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:01:27,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141967911] [2023-11-29 02:01:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:27,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:27,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:27,762 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:27,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-29 02:01:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:28,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-29 02:01:28,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:28,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:01:28,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:01:28,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:01:28,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:01:28,836 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 [2023-11-29 02:01:28,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:01:28,907 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 [2023-11-29 02:01:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:28,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:29,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278233262] [2023-11-29 02:01:29,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:01:29,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141967911] [2023-11-29 02:01:29,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141967911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:01:29,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:01:29,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 02:01:29,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395131094] [2023-11-29 02:01:29,624 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:29,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:01:29,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:29,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:01:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:01:29,626 INFO L87 Difference]: Start difference. First operand 506 states and 672 transitions. Second operand has 17 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:01:31,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:01:31,220 INFO L93 Difference]: Finished difference Result 556 states and 706 transitions. [2023-11-29 02:01:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:01:31,221 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 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 55 [2023-11-29 02:01:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:01:31,224 INFO L225 Difference]: With dead ends: 556 [2023-11-29 02:01:31,224 INFO L226 Difference]: Without dead ends: 555 [2023-11-29 02:01:31,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:01:31,225 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 384 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:01:31,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 1768 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 02:01:31,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-11-29 02:01:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 506. [2023-11-29 02:01:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 420 states have (on average 1.4357142857142857) internal successors, (603), 472 states have internal predecessors, (603), 22 states have call successors, (22), 14 states have call predecessors, (22), 20 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-11-29 02:01:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 669 transitions. [2023-11-29 02:01:31,258 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 669 transitions. Word has length 55 [2023-11-29 02:01:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:01:31,258 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 669 transitions. [2023-11-29 02:01:31,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:01:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 669 transitions. [2023-11-29 02:01:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 02:01:31,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:01:31,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:31,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-11-29 02:01:31,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 02:01:31,459 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:01:31,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:31,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1980962940, now seen corresponding path program 1 times [2023-11-29 02:01:31,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:31,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708749378] [2023-11-29 02:01:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:31,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:31,483 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:01:31,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912200533] [2023-11-29 02:01:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:31,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:31,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:31,485 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:31,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-29 02:01:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:31,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:01:31,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:31,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:01:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:31,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:01:31,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:31,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708749378] [2023-11-29 02:01:31,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:01:31,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912200533] [2023-11-29 02:01:31,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912200533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:01:31,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:01:31,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:01:31,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282592897] [2023-11-29 02:01:31,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:01:31,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:01:31,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:31,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:01:31,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:01:31,773 INFO L87 Difference]: Start difference. First operand 506 states and 669 transitions. Second operand has 5 states, 4 states have (on average 12.75) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:01:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:01:31,916 INFO L93 Difference]: Finished difference Result 569 states and 745 transitions. [2023-11-29 02:01:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:01:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.75) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2023-11-29 02:01:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:01:31,919 INFO L225 Difference]: With dead ends: 569 [2023-11-29 02:01:31,919 INFO L226 Difference]: Without dead ends: 568 [2023-11-29 02:01:31,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:01:31,920 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 73 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:01:31,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 353 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:01:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2023-11-29 02:01:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 542. [2023-11-29 02:01:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 450 states have (on average 1.451111111111111) internal successors, (653), 503 states have internal predecessors, (653), 24 states have call successors, (24), 14 states have call predecessors, (24), 24 states have return successors, (60), 26 states have call predecessors, (60), 24 states have call successors, (60) [2023-11-29 02:01:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 737 transitions. [2023-11-29 02:01:31,958 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 737 transitions. Word has length 55 [2023-11-29 02:01:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:01:31,958 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 737 transitions. [2023-11-29 02:01:31,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.75) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:01:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 737 transitions. [2023-11-29 02:01:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 02:01:31,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:01:31,959 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:31,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-29 02:01:32,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:32,160 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting func_to_recursive_line_0_to_41_0Err11ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:01:32,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -560143276, now seen corresponding path program 1 times [2023-11-29 02:01:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:32,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7920324] [2023-11-29 02:01:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:32,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:32,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:01:32,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022372133] [2023-11-29 02:01:32,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:32,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:32,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:32,181 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:32,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-29 02:01:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:32,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 02:01:32,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:32,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:01:32,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:01:32,806 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 [2023-11-29 02:01:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:32,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:33,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:33,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7920324] [2023-11-29 02:01:33,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:01:33,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022372133] [2023-11-29 02:01:33,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022372133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:01:33,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:01:33,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2023-11-29 02:01:33,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359499411] [2023-11-29 02:01:33,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:33,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:01:33,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:33,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:01:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:01:33,183 INFO L87 Difference]: Start difference. First operand 542 states and 737 transitions. Second operand has 18 states, 15 states have (on average 6.933333333333334) internal successors, (104), 14 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:01:33,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:01:33,962 INFO L93 Difference]: Finished difference Result 549 states and 743 transitions. [2023-11-29 02:01:33,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:01:33,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 6.933333333333334) internal successors, (104), 14 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2023-11-29 02:01:33,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:01:33,965 INFO L225 Difference]: With dead ends: 549 [2023-11-29 02:01:33,966 INFO L226 Difference]: Without dead ends: 548 [2023-11-29 02:01:33,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:01:33,966 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 507 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:01:33,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1006 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:01:33,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-29 02:01:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 541. [2023-11-29 02:01:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 450 states have (on average 1.4288888888888889) internal successors, (643), 502 states have internal predecessors, (643), 24 states have call successors, (24), 14 states have call predecessors, (24), 24 states have return successors, (60), 26 states have call predecessors, (60), 24 states have call successors, (60) [2023-11-29 02:01:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 727 transitions. [2023-11-29 02:01:34,028 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 727 transitions. Word has length 56 [2023-11-29 02:01:34,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:01:34,028 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 727 transitions. [2023-11-29 02:01:34,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 6.933333333333334) internal successors, (104), 14 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:01:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 727 transitions. [2023-11-29 02:01:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 02:01:34,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:01:34,029 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:34,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-29 02:01:34,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-11-29 02:01:34,229 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting func_to_recursive_line_0_to_41_0Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:01:34,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash 663746462, now seen corresponding path program 1 times [2023-11-29 02:01:34,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:34,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929665491] [2023-11-29 02:01:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:34,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:34,249 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:01:34,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187018626] [2023-11-29 02:01:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:34,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:34,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:34,251 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:34,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-29 02:01:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:34,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 02:01:34,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:34,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:01:34,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:01:35,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:01:35,144 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 [2023-11-29 02:01:35,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:01:35,198 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 [2023-11-29 02:01:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:35,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:35,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929665491] [2023-11-29 02:01:35,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:01:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187018626] [2023-11-29 02:01:35,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187018626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:01:35,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:01:35,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-29 02:01:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586560855] [2023-11-29 02:01:35,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:35,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:01:35,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:01:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:01:35,849 INFO L87 Difference]: Start difference. First operand 541 states and 727 transitions. Second operand has 23 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:01:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:01:47,323 INFO L93 Difference]: Finished difference Result 708 states and 859 transitions. [2023-11-29 02:01:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 02:01:47,324 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2023-11-29 02:01:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:01:47,326 INFO L225 Difference]: With dead ends: 708 [2023-11-29 02:01:47,327 INFO L226 Difference]: Without dead ends: 706 [2023-11-29 02:01:47,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:01:47,327 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 941 mSDsluCounter, 1624 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:01:47,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 1744 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-11-29 02:01:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-11-29 02:01:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 591. [2023-11-29 02:01:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 494 states have (on average 1.4271255060728745) internal successors, (705), 548 states have internal predecessors, (705), 27 states have call successors, (27), 15 states have call predecessors, (27), 27 states have return successors, (75), 29 states have call predecessors, (75), 27 states have call successors, (75) [2023-11-29 02:01:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 807 transitions. [2023-11-29 02:01:47,385 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 807 transitions. Word has length 56 [2023-11-29 02:01:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:01:47,385 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 807 transitions. [2023-11-29 02:01:47,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:01:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 807 transitions. [2023-11-29 02:01:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 02:01:47,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:01:47,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:47,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-29 02:01:47,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-11-29 02:01:47,586 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:01:47,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1280308828, now seen corresponding path program 1 times [2023-11-29 02:01:47,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:47,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706850515] [2023-11-29 02:01:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:47,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:47,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:01:47,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244789238] [2023-11-29 02:01:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:47,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:47,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:47,602 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:47,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-29 02:01:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:47,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:01:47,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:47,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:01:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:47,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:01:47,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:47,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706850515] [2023-11-29 02:01:47,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:01:47,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244789238] [2023-11-29 02:01:47,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244789238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:01:47,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:01:47,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:01:47,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910708362] [2023-11-29 02:01:47,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:01:47,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:01:47,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:47,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:01:47,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:01:47,928 INFO L87 Difference]: Start difference. First operand 591 states and 807 transitions. Second operand has 5 states, 4 states have (on average 13.0) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:01:48,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:01:48,079 INFO L93 Difference]: Finished difference Result 617 states and 814 transitions. [2023-11-29 02:01:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:01:48,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2023-11-29 02:01:48,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:01:48,082 INFO L225 Difference]: With dead ends: 617 [2023-11-29 02:01:48,082 INFO L226 Difference]: Without dead ends: 616 [2023-11-29 02:01:48,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:01:48,083 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 69 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:01:48,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 352 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:01:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-11-29 02:01:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 592. [2023-11-29 02:01:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 495 states have (on average 1.4262626262626263) internal successors, (706), 549 states have internal predecessors, (706), 27 states have call successors, (27), 15 states have call predecessors, (27), 27 states have return successors, (75), 29 states have call predecessors, (75), 27 states have call successors, (75) [2023-11-29 02:01:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 808 transitions. [2023-11-29 02:01:48,121 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 808 transitions. Word has length 56 [2023-11-29 02:01:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:01:48,122 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 808 transitions. [2023-11-29 02:01:48,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:01:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 808 transitions. [2023-11-29 02:01:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 02:01:48,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:01:48,122 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:48,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-11-29 02:01:48,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:48,323 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting func_to_recursive_line_0_to_41_0Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:01:48,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:48,323 INFO L85 PathProgramCache]: Analyzing trace with hash -898696107, now seen corresponding path program 1 times [2023-11-29 02:01:48,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:48,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10514240] [2023-11-29 02:01:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:48,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:48,339 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:01:48,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732513014] [2023-11-29 02:01:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:48,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:48,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:48,340 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:48,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-29 02:01:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:48,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 150 conjunts are in the unsatisfiable core [2023-11-29 02:01:48,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:48,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:01:48,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:01:48,803 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 25 treesize of output 19 [2023-11-29 02:01:48,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:01:48,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:01:50,182 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 15 [2023-11-29 02:01:50,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:01:50,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:01:50,823 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 [2023-11-29 02:01:50,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:01:50,883 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 [2023-11-29 02:01:50,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:01:50,941 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 [2023-11-29 02:01:50,997 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 [2023-11-29 02:01:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:51,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:53,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:53,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10514240] [2023-11-29 02:01:53,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:01:53,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732513014] [2023-11-29 02:01:53,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732513014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:01:53,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:01:53,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 33 [2023-11-29 02:01:53,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034519947] [2023-11-29 02:01:53,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:53,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:01:53,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:53,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:01:53,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:01:53,354 INFO L87 Difference]: Start difference. First operand 592 states and 808 transitions. Second operand has 34 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 29 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:02:05,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 02:02:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:02:17,822 INFO L93 Difference]: Finished difference Result 671 states and 871 transitions. [2023-11-29 02:02:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 02:02:17,823 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 29 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2023-11-29 02:02:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:02:17,826 INFO L225 Difference]: With dead ends: 671 [2023-11-29 02:02:17,826 INFO L226 Difference]: Without dead ends: 670 [2023-11-29 02:02:17,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=381, Invalid=2811, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 02:02:17,826 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 469 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 2299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:02:17,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 2149 Invalid, 2299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 17.7s Time] [2023-11-29 02:02:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-11-29 02:02:17,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 592. [2023-11-29 02:02:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 495 states have (on average 1.4202020202020202) internal successors, (703), 549 states have internal predecessors, (703), 27 states have call successors, (27), 15 states have call predecessors, (27), 27 states have return successors, (75), 29 states have call predecessors, (75), 27 states have call successors, (75) [2023-11-29 02:02:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 805 transitions. [2023-11-29 02:02:17,885 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 805 transitions. Word has length 57 [2023-11-29 02:02:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:02:17,885 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 805 transitions. [2023-11-29 02:02:17,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 29 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:02:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 805 transitions. [2023-11-29 02:02:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 02:02:17,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:02:17,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-29 02:02:17,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-11-29 02:02:18,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:18,086 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:02:18,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1034867834, now seen corresponding path program 1 times [2023-11-29 02:02:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:02:18,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703614437] [2023-11-29 02:02:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:18,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:02:18,101 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:02:18,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727237161] [2023-11-29 02:02:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:02:18,102 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:02:18,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-29 02:02:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:18,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:02:18,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:18,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:02:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:18,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:02:18,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:02:18,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703614437] [2023-11-29 02:02:18,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:02:18,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727237161] [2023-11-29 02:02:18,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727237161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:02:18,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:02:18,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:02:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416240120] [2023-11-29 02:02:18,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:02:18,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:02:18,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:02:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:02:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:02:18,440 INFO L87 Difference]: Start difference. First operand 592 states and 805 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:02:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:02:18,632 INFO L93 Difference]: Finished difference Result 616 states and 810 transitions. [2023-11-29 02:02:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:02:18,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2023-11-29 02:02:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:02:18,636 INFO L225 Difference]: With dead ends: 616 [2023-11-29 02:02:18,636 INFO L226 Difference]: Without dead ends: 615 [2023-11-29 02:02:18,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:02:18,636 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 66 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:02:18,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 401 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:02:18,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-11-29 02:02:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 593. [2023-11-29 02:02:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 496 states have (on average 1.4193548387096775) internal successors, (704), 550 states have internal predecessors, (704), 27 states have call successors, (27), 15 states have call predecessors, (27), 27 states have return successors, (75), 29 states have call predecessors, (75), 27 states have call successors, (75) [2023-11-29 02:02:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 806 transitions. [2023-11-29 02:02:18,674 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 806 transitions. Word has length 57 [2023-11-29 02:02:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:02:18,675 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 806 transitions. [2023-11-29 02:02:18,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:02:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 806 transitions. [2023-11-29 02:02:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 02:02:18,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:02:18,675 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:02:18,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-29 02:02:18,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-11-29 02:02:18,876 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting func_to_recursive_line_0_to_41_0Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:02:18,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2089775488, now seen corresponding path program 1 times [2023-11-29 02:02:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:02:18,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88655924] [2023-11-29 02:02:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:18,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:02:18,891 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:02:18,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661661967] [2023-11-29 02:02:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:18,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:18,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:02:18,892 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:02:18,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-29 02:02:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:19,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 02:02:19,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:19,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:02:19,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:02:19,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:02:19,637 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 [2023-11-29 02:02:19,731 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 [2023-11-29 02:02:19,735 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 [2023-11-29 02:02:19,764 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 13 treesize of output 9 [2023-11-29 02:02:19,870 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 [2023-11-29 02:02:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:19,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:02:20,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:02:20,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88655924] [2023-11-29 02:02:20,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:02:20,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661661967] [2023-11-29 02:02:20,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661661967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:02:20,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:02:20,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-29 02:02:20,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280573031] [2023-11-29 02:02:20,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:02:20,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:02:20,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:02:20,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:02:20,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:02:20,974 INFO L87 Difference]: Start difference. First operand 593 states and 806 transitions. Second operand has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:02:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:02:22,459 INFO L93 Difference]: Finished difference Result 637 states and 839 transitions. [2023-11-29 02:02:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:02:22,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 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 58 [2023-11-29 02:02:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:02:22,462 INFO L225 Difference]: With dead ends: 637 [2023-11-29 02:02:22,462 INFO L226 Difference]: Without dead ends: 636 [2023-11-29 02:02:22,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2023-11-29 02:02:22,462 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 335 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:02:22,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1493 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:02:22,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2023-11-29 02:02:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 593. [2023-11-29 02:02:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 496 states have (on average 1.4133064516129032) internal successors, (701), 550 states have internal predecessors, (701), 27 states have call successors, (27), 15 states have call predecessors, (27), 27 states have return successors, (75), 29 states have call predecessors, (75), 27 states have call successors, (75) [2023-11-29 02:02:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 803 transitions. [2023-11-29 02:02:22,501 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 803 transitions. Word has length 58 [2023-11-29 02:02:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:02:22,501 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 803 transitions. [2023-11-29 02:02:22,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:02:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 803 transitions. [2023-11-29 02:02:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 02:02:22,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:02:22,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2023-11-29 02:02:22,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-29 02:02:22,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:22,702 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:02:22,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2016131610, now seen corresponding path program 1 times [2023-11-29 02:02:22,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:02:22,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072699894] [2023-11-29 02:02:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:22,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:02:22,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:02:22,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521260381] [2023-11-29 02:02:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:22,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:22,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:02:22,719 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:02:22,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-29 02:02:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:22,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:02:22,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:22,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:02:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:23,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:02:23,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:02:23,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072699894] [2023-11-29 02:02:23,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:02:23,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521260381] [2023-11-29 02:02:23,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521260381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:02:23,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:02:23,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:02:23,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849924551] [2023-11-29 02:02:23,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:02:23,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:02:23,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:02:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:02:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:02:23,045 INFO L87 Difference]: Start difference. First operand 593 states and 803 transitions. Second operand has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:02:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:02:23,213 INFO L93 Difference]: Finished difference Result 615 states and 806 transitions. [2023-11-29 02:02:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:02:23,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2023-11-29 02:02:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:02:23,217 INFO L225 Difference]: With dead ends: 615 [2023-11-29 02:02:23,217 INFO L226 Difference]: Without dead ends: 589 [2023-11-29 02:02:23,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:02:23,218 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 63 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:02:23,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 330 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:02:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-11-29 02:02:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 569. [2023-11-29 02:02:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 473 states have (on average 1.4291754756871036) internal successors, (676), 527 states have internal predecessors, (676), 27 states have call successors, (27), 15 states have call predecessors, (27), 26 states have return successors, (74), 28 states have call predecessors, (74), 27 states have call successors, (74) [2023-11-29 02:02:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 777 transitions. [2023-11-29 02:02:23,261 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 777 transitions. Word has length 58 [2023-11-29 02:02:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:02:23,261 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 777 transitions. [2023-11-29 02:02:23,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:02:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 777 transitions. [2023-11-29 02:02:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 02:02:23,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:02:23,262 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-11-29 02:02:23,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-29 02:02:23,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-29 02:02:23,462 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting func_to_recursive_line_0_to_41_0Err14ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:02:23,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:23,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1280331703, now seen corresponding path program 1 times [2023-11-29 02:02:23,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:02:23,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967329744] [2023-11-29 02:02:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:23,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:02:23,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:02:23,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759481192] [2023-11-29 02:02:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:23,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:23,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:02:23,479 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:02:23,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-29 02:02:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:23,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 138 conjunts are in the unsatisfiable core [2023-11-29 02:02:23,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:23,781 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 15 treesize of output 1 [2023-11-29 02:02:23,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:02:23,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:02:23,875 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 25 treesize of output 19 [2023-11-29 02:02:23,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:02:24,728 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 [2023-11-29 02:02:37,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:02:37,346 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 [2023-11-29 02:02:37,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:02:37,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:02:37,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 02:02:37,626 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 [2023-11-29 02:02:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:37,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:11,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:11,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967329744] [2023-11-29 02:03:11,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:03:11,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759481192] [2023-11-29 02:03:11,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759481192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:03:11,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:03:11,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 02:03:11,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722934066] [2023-11-29 02:03:11,590 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:11,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:03:11,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:11,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:03:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=835, Unknown=12, NotChecked=0, Total=930 [2023-11-29 02:03:11,591 INFO L87 Difference]: Start difference. First operand 569 states and 777 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:03:16,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:03:20,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:03:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:03:22,489 INFO L93 Difference]: Finished difference Result 583 states and 781 transitions. [2023-11-29 02:03:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:03:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 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 59 [2023-11-29 02:03:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:03:22,493 INFO L225 Difference]: With dead ends: 583 [2023-11-29 02:03:22,493 INFO L226 Difference]: Without dead ends: 582 [2023-11-29 02:03:22,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=188, Invalid=1440, Unknown=12, NotChecked=0, Total=1640 [2023-11-29 02:03:22,494 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 184 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:03:22,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1486 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1049 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2023-11-29 02:03:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-11-29 02:03:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 569. [2023-11-29 02:03:22,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 473 states have (on average 1.427061310782241) internal successors, (675), 527 states have internal predecessors, (675), 27 states have call successors, (27), 15 states have call predecessors, (27), 26 states have return successors, (74), 28 states have call predecessors, (74), 27 states have call successors, (74) [2023-11-29 02:03:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 776 transitions. [2023-11-29 02:03:22,533 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 776 transitions. Word has length 59 [2023-11-29 02:03:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:03:22,533 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 776 transitions. [2023-11-29 02:03:22,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:03:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 776 transitions. [2023-11-29 02:03:22,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 02:03:22,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:03:22,534 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:22,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-11-29 02:03:22,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-29 02:03:22,734 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting func_to_recursive_line_0_to_41_0Err10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:03:22,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash -358530633, now seen corresponding path program 1 times [2023-11-29 02:03:22,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:22,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78624746] [2023-11-29 02:03:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:22,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:22,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:03:22,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766973303] [2023-11-29 02:03:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:22,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:22,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:22,752 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:03:22,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-29 02:03:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:23,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 154 conjunts are in the unsatisfiable core [2023-11-29 02:03:23,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:23,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:03:23,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:03:23,220 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 25 treesize of output 19 [2023-11-29 02:03:23,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:03:23,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:03:24,107 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 [2023-11-29 02:03:25,034 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 02:03:25,034 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 [2023-11-29 02:03:25,319 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 02:03:25,320 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 [2023-11-29 02:03:25,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:25,570 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 26 treesize of output 22 [2023-11-29 02:03:25,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:03:25,756 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 [2023-11-29 02:03:25,764 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 [2023-11-29 02:03:25,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:03:25,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:25,962 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 29 treesize of output 21 [2023-11-29 02:03:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:26,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:31,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78624746] [2023-11-29 02:03:31,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:03:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766973303] [2023-11-29 02:03:31,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766973303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:03:31,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:03:31,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 35 [2023-11-29 02:03:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361085999] [2023-11-29 02:03:31,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:31,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 02:03:31,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 02:03:31,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1142, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:03:31,314 INFO L87 Difference]: Start difference. First operand 569 states and 776 transitions. Second operand has 36 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 31 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:03:46,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:03:57,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:04:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:04:10,266 INFO L93 Difference]: Finished difference Result 639 states and 834 transitions. [2023-11-29 02:04:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 02:04:10,266 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 31 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2023-11-29 02:04:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:04:10,269 INFO L225 Difference]: With dead ends: 639 [2023-11-29 02:04:10,269 INFO L226 Difference]: Without dead ends: 638 [2023-11-29 02:04:10,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=447, Invalid=3335, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 02:04:10,271 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 622 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:04:10,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 1467 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 29.3s Time] [2023-11-29 02:04:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2023-11-29 02:04:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 569. [2023-11-29 02:04:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 473 states have (on average 1.4207188160676534) internal successors, (672), 527 states have internal predecessors, (672), 27 states have call successors, (27), 15 states have call predecessors, (27), 26 states have return successors, (74), 28 states have call predecessors, (74), 27 states have call successors, (74) [2023-11-29 02:04:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 773 transitions. [2023-11-29 02:04:10,336 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 773 transitions. Word has length 59 [2023-11-29 02:04:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:04:10,336 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 773 transitions. [2023-11-29 02:04:10,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 31 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:04:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 773 transitions. [2023-11-29 02:04:10,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 02:04:10,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:04:10,337 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-11-29 02:04:10,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-11-29 02:04:10,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-29 02:04:10,538 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting func_to_recursive_line_0_to_41_0Err15ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:04:10,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:04:10,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1035577064, now seen corresponding path program 1 times [2023-11-29 02:04:10,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:04:10,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372523222] [2023-11-29 02:04:10,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:10,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:04:10,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:04:10,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016130553] [2023-11-29 02:04:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:10,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:04:10,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:04:10,599 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:04:10,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-29 02:04:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:10,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 02:04:10,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:04:10,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:04:10,948 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 [2023-11-29 02:04:11,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:04:15,373 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_0_to_41_0_~X.base_BEFORE_CALL_28 Int) (v_func_to_recursive_line_0_to_41_0_~Y.base_BEFORE_CALL_32 Int) (v_func_to_recursive_line_0_to_41_0_~v.base_BEFORE_CALL_5 Int)) (<= (* 2 (select (select |c_#memory_int#2| v_func_to_recursive_line_0_to_41_0_~Y.base_BEFORE_CALL_32) 0)) (+ (select (select |c_#memory_int#4| v_func_to_recursive_line_0_to_41_0_~X.base_BEFORE_CALL_28) 0) (select (select |c_#memory_int#6| v_func_to_recursive_line_0_to_41_0_~v.base_BEFORE_CALL_5) 0)))) is different from true [2023-11-29 02:04:15,435 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 [2023-11-29 02:04:15,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 02:04:15,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:04:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:15,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:04:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:16,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:04:16,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372523222] [2023-11-29 02:04:16,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:04:16,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016130553] [2023-11-29 02:04:16,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016130553] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:04:16,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:04:16,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-29 02:04:16,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071278555] [2023-11-29 02:04:16,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:04:16,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:04:16,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:04:16,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:04:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=404, Unknown=1, NotChecked=40, Total=506 [2023-11-29 02:04:16,211 INFO L87 Difference]: Start difference. First operand 569 states and 773 transitions. Second operand has 23 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:04:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:04:17,446 INFO L93 Difference]: Finished difference Result 694 states and 937 transitions. [2023-11-29 02:04:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:04:17,447 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2023-11-29 02:04:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:04:17,450 INFO L225 Difference]: With dead ends: 694 [2023-11-29 02:04:17,450 INFO L226 Difference]: Without dead ends: 693 [2023-11-29 02:04:17,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=124, Invalid=691, Unknown=1, NotChecked=54, Total=870 [2023-11-29 02:04:17,450 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 258 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:04:17,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1516 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 692 Invalid, 0 Unknown, 308 Unchecked, 0.9s Time] [2023-11-29 02:04:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-29 02:04:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 661. [2023-11-29 02:04:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 556 states have (on average 1.435251798561151) internal successors, (798), 613 states have internal predecessors, (798), 32 states have call successors, (32), 17 states have call predecessors, (32), 30 states have return successors, (78), 32 states have call predecessors, (78), 32 states have call successors, (78) [2023-11-29 02:04:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 908 transitions. [2023-11-29 02:04:17,500 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 908 transitions. Word has length 60 [2023-11-29 02:04:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:04:17,500 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 908 transitions. [2023-11-29 02:04:17,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:04:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 908 transitions. [2023-11-29 02:04:17,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 02:04:17,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:04:17,501 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-11-29 02:04:17,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-11-29 02:04:17,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-11-29 02:04:17,701 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting func_to_recursive_line_0_to_41_0Err16ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:04:17,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:04:17,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2038117845, now seen corresponding path program 1 times [2023-11-29 02:04:17,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:04:17,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271173134] [2023-11-29 02:04:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:17,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:04:17,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:04:17,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747049742] [2023-11-29 02:04:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:17,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:04:17,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:04:17,718 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:04:17,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-29 02:04:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:17,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 02:04:17,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:04:17,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:04:18,113 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 44 treesize of output 21 [2023-11-29 02:04:18,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 02:04:18,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:04:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:18,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:04:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:18,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:04:18,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271173134] [2023-11-29 02:04:18,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:04:18,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747049742] [2023-11-29 02:04:18,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747049742] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:04:18,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:04:18,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2023-11-29 02:04:18,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029051683] [2023-11-29 02:04:18,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:04:18,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:04:18,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:04:18,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:04:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:04:18,551 INFO L87 Difference]: Start difference. First operand 661 states and 908 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:04:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:04:19,289 INFO L93 Difference]: Finished difference Result 866 states and 1189 transitions. [2023-11-29 02:04:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:04:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (3), 2 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 61 [2023-11-29 02:04:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:04:19,294 INFO L225 Difference]: With dead ends: 866 [2023-11-29 02:04:19,295 INFO L226 Difference]: Without dead ends: 865 [2023-11-29 02:04:19,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:04:19,296 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 121 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:04:19,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 839 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:04:19,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2023-11-29 02:04:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 794. [2023-11-29 02:04:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 676 states have (on average 1.4511834319526626) internal successors, (981), 734 states have internal predecessors, (981), 38 states have call successors, (38), 22 states have call predecessors, (38), 37 states have return successors, (89), 39 states have call predecessors, (89), 38 states have call successors, (89) [2023-11-29 02:04:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1108 transitions. [2023-11-29 02:04:19,364 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1108 transitions. Word has length 61 [2023-11-29 02:04:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:04:19,364 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1108 transitions. [2023-11-29 02:04:19,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:04:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1108 transitions. [2023-11-29 02:04:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 02:04:19,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:04:19,365 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:04:19,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-11-29 02:04:19,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:04:19,565 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting func_to_recursive_line_0_to_41_0Err17ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:04:19,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:04:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1242856314, now seen corresponding path program 1 times [2023-11-29 02:04:19,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:04:19,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958228009] [2023-11-29 02:04:19,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:19,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:04:19,580 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:04:19,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062363962] [2023-11-29 02:04:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:19,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:04:19,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:04:19,582 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:04:19,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-29 02:04:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:19,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 153 conjunts are in the unsatisfiable core [2023-11-29 02:04:19,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:04:19,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:04:19,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:04:19,964 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 25 treesize of output 19 [2023-11-29 02:04:19,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:04:19,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:04:21,130 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 43 treesize of output 31 [2023-11-29 02:04:29,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:04:29,705 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 [2023-11-29 02:04:29,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:04:29,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:04:30,005 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 [2023-11-29 02:04:30,082 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 30 treesize of output 18 [2023-11-29 02:04:30,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:04:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:30,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:02,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:02,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958228009] [2023-11-29 02:05:02,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:05:02,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062363962] [2023-11-29 02:05:02,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062363962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:02,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:05:02,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 02:05:02,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795494399] [2023-11-29 02:05:02,537 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:02,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:05:02,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:02,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:05:02,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=898, Unknown=10, NotChecked=0, Total=992 [2023-11-29 02:05:02,538 INFO L87 Difference]: Start difference. First operand 794 states and 1108 transitions. Second operand has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:05:07,315 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] [2023-11-29 02:05:11,368 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] [2023-11-29 02:05:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:13,943 INFO L93 Difference]: Finished difference Result 803 states and 1112 transitions. [2023-11-29 02:05:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:05:13,944 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 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 62 [2023-11-29 02:05:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:13,948 INFO L225 Difference]: With dead ends: 803 [2023-11-29 02:05:13,948 INFO L226 Difference]: Without dead ends: 802 [2023-11-29 02:05:13,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=200, Invalid=1512, Unknown=10, NotChecked=0, Total=1722 [2023-11-29 02:05:13,949 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 153 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:13,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1143 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 818 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2023-11-29 02:05:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2023-11-29 02:05:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 794. [2023-11-29 02:05:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 676 states have (on average 1.4497041420118344) internal successors, (980), 734 states have internal predecessors, (980), 38 states have call successors, (38), 22 states have call predecessors, (38), 37 states have return successors, (89), 39 states have call predecessors, (89), 38 states have call successors, (89) [2023-11-29 02:05:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1107 transitions. [2023-11-29 02:05:14,017 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1107 transitions. Word has length 62 [2023-11-29 02:05:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:14,017 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1107 transitions. [2023-11-29 02:05:14,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:05:14,017 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1107 transitions. [2023-11-29 02:05:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 02:05:14,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:14,018 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:14,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-11-29 02:05:14,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:14,218 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting func_to_recursive_line_0_to_41_0Err14ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:05:14,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1346788475, now seen corresponding path program 1 times [2023-11-29 02:05:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:14,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374926733] [2023-11-29 02:05:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:14,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:05:14,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285962858] [2023-11-29 02:05:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:14,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:14,235 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:14,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-11-29 02:05:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:14,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 02:05:14,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:14,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:05:14,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:05:14,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:05:14,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:05:15,216 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 [2023-11-29 02:05:15,259 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 [2023-11-29 02:05:15,469 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 15 treesize of output 7 [2023-11-29 02:05:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:15,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:16,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:16,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374926733] [2023-11-29 02:05:16,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:05:16,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285962858] [2023-11-29 02:05:16,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285962858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:16,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:05:16,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 02:05:16,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021889499] [2023-11-29 02:05:16,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:16,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:05:16,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:05:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:05:16,231 INFO L87 Difference]: Start difference. First operand 794 states and 1107 transitions. Second operand has 25 states, 22 states have (on average 5.363636363636363) internal successors, (118), 21 states have internal predecessors, (118), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:05:21,087 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] [2023-11-29 02:05:25,229 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] [2023-11-29 02:05:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:26,039 INFO L93 Difference]: Finished difference Result 818 states and 1109 transitions. [2023-11-29 02:05:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:05:26,039 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 5.363636363636363) internal successors, (118), 21 states have internal predecessors, (118), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2023-11-29 02:05:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:26,043 INFO L225 Difference]: With dead ends: 818 [2023-11-29 02:05:26,043 INFO L226 Difference]: Without dead ends: 817 [2023-11-29 02:05:26,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:05:26,044 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 440 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:26,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 1656 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 671 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2023-11-29 02:05:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-11-29 02:05:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 794. [2023-11-29 02:05:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 676 states have (on average 1.4378698224852071) internal successors, (972), 734 states have internal predecessors, (972), 38 states have call successors, (38), 22 states have call predecessors, (38), 37 states have return successors, (89), 39 states have call predecessors, (89), 38 states have call successors, (89) [2023-11-29 02:05:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1099 transitions. [2023-11-29 02:05:26,111 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1099 transitions. Word has length 63 [2023-11-29 02:05:26,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:26,111 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1099 transitions. [2023-11-29 02:05:26,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 5.363636363636363) internal successors, (118), 21 states have internal predecessors, (118), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:05:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1099 transitions. [2023-11-29 02:05:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 02:05:26,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:26,112 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:26,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-11-29 02:05:26,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:26,312 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting func_to_recursive_line_0_to_41_0Err15ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:05:26,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1199230170, now seen corresponding path program 1 times [2023-11-29 02:05:26,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:26,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235105649] [2023-11-29 02:05:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:26,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:26,330 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:05:26,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949769136] [2023-11-29 02:05:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:26,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:26,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:26,331 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:26,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-11-29 02:05:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:26,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 129 conjunts are in the unsatisfiable core [2023-11-29 02:05:26,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:26,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:05:26,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:05:26,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:05:26,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:05:27,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:05:27,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:05:28,148 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 [2023-11-29 02:05:28,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:05:28,240 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 [2023-11-29 02:05:28,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:05:28,415 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 [2023-11-29 02:05:28,477 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 22 treesize of output 10 [2023-11-29 02:05:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:28,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:32,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:32,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235105649] [2023-11-29 02:05:32,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:05:32,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949769136] [2023-11-29 02:05:32,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949769136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:32,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:05:32,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2023-11-29 02:05:32,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041887379] [2023-11-29 02:05:32,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:32,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 02:05:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:32,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 02:05:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:05:32,572 INFO L87 Difference]: Start difference. First operand 794 states and 1099 transitions. Second operand has 33 states, 30 states have (on average 4.0) internal successors, (120), 29 states have internal predecessors, (120), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:06:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:05,895 INFO L93 Difference]: Finished difference Result 860 states and 1157 transitions. [2023-11-29 02:06:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 02:06:05,895 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 4.0) internal successors, (120), 29 states have internal predecessors, (120), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2023-11-29 02:06:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:05,899 INFO L225 Difference]: With dead ends: 860 [2023-11-29 02:06:05,899 INFO L226 Difference]: Without dead ends: 859 [2023-11-29 02:06:05,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=463, Invalid=3197, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 02:06:05,900 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 521 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:05,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1870 Invalid, 1861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 26.5s Time] [2023-11-29 02:06:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2023-11-29 02:06:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 794. [2023-11-29 02:06:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 676 states have (on average 1.433431952662722) internal successors, (969), 734 states have internal predecessors, (969), 38 states have call successors, (38), 22 states have call predecessors, (38), 37 states have return successors, (89), 39 states have call predecessors, (89), 38 states have call successors, (89) [2023-11-29 02:06:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1096 transitions. [2023-11-29 02:06:05,967 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1096 transitions. Word has length 64 [2023-11-29 02:06:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:05,967 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1096 transitions. [2023-11-29 02:06:05,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 4.0) internal successors, (120), 29 states have internal predecessors, (120), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:06:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1096 transitions. [2023-11-29 02:06:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 02:06:05,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:05,968 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-11-29 02:06:05,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-11-29 02:06:06,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:06,168 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting func_to_recursive_line_0_to_41_0Err16ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:06:06,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1478570461, now seen corresponding path program 1 times [2023-11-29 02:06:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:06,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782501452] [2023-11-29 02:06:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:06,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:06,186 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:06:06,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035840843] [2023-11-29 02:06:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:06,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:06,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:06,187 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:06,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-11-29 02:06:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:06,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 121 conjunts are in the unsatisfiable core [2023-11-29 02:06:06,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:06,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:06:06,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:06:06,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:06:06,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:06:07,668 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 62 treesize of output 39 [2023-11-29 02:06:15,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:06:16,174 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 [2023-11-29 02:06:16,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:06:16,479 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 36 treesize of output 24 [2023-11-29 02:06:16,569 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 45 treesize of output 29 [2023-11-29 02:06:16,692 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 32 [2023-11-29 02:06:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:16,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:18,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:18,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782501452] [2023-11-29 02:06:18,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:06:18,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035840843] [2023-11-29 02:06:18,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035840843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:18,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:06:18,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2023-11-29 02:06:18,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065782953] [2023-11-29 02:06:18,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:18,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 02:06:18,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:18,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 02:06:18,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1507, Unknown=2, NotChecked=0, Total=1640 [2023-11-29 02:06:18,388 INFO L87 Difference]: Start difference. First operand 794 states and 1096 transitions. Second operand has 41 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:06:24,875 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] [2023-11-29 02:06:29,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:06:33,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:06:37,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:06:41,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:06:45,473 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] [2023-11-29 02:06:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:50,346 INFO L93 Difference]: Finished difference Result 829 states and 1118 transitions. [2023-11-29 02:06:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 02:06:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2023-11-29 02:06:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:50,350 INFO L225 Difference]: With dead ends: 829 [2023-11-29 02:06:50,350 INFO L226 Difference]: Without dead ends: 828 [2023-11-29 02:06:50,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=623, Invalid=4345, Unknown=2, NotChecked=0, Total=4970 [2023-11-29 02:06:50,351 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 534 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 32 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:50,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 2414 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2109 Invalid, 6 Unknown, 0 Unchecked, 28.1s Time] [2023-11-29 02:06:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-11-29 02:06:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 794. [2023-11-29 02:06:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 676 states have (on average 1.430473372781065) internal successors, (967), 734 states have internal predecessors, (967), 38 states have call successors, (38), 22 states have call predecessors, (38), 37 states have return successors, (89), 39 states have call predecessors, (89), 38 states have call successors, (89) [2023-11-29 02:06:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1094 transitions. [2023-11-29 02:06:50,417 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1094 transitions. Word has length 65 [2023-11-29 02:06:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:50,417 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1094 transitions. [2023-11-29 02:06:50,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:06:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1094 transitions. [2023-11-29 02:06:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 02:06:50,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:50,417 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-11-29 02:06:50,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-11-29 02:06:50,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:50,618 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting func_to_recursive_line_0_to_41_0Err17ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:06:50,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:50,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1408955896, now seen corresponding path program 1 times [2023-11-29 02:06:50,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:50,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84700857] [2023-11-29 02:06:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:50,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:50,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:06:50,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762054065] [2023-11-29 02:06:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:50,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:50,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:50,636 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:50,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-11-29 02:06:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:50,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 150 conjunts are in the unsatisfiable core [2023-11-29 02:06:50,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:50,957 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 1 [2023-11-29 02:06:50,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:06:51,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:06:51,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:06:51,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:06:52,277 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 62 treesize of output 39 [2023-11-29 02:06:56,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:06:56,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:06:56,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:06:57,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:06:57,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:06:57,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:06:57,297 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 36 treesize of output 24 [2023-11-29 02:06:57,379 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 49 treesize of output 33 [2023-11-29 02:06:57,504 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 60 treesize of output 40 [2023-11-29 02:06:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:57,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:43,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:43,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84700857] [2023-11-29 02:07:43,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:07:43,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762054065] [2023-11-29 02:07:43,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762054065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:43,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:07:43,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 02:07:43,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544937673] [2023-11-29 02:07:43,608 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:43,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:07:43,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:43,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:07:43,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1085, Unknown=11, NotChecked=0, Total=1190 [2023-11-29 02:07:43,609 INFO L87 Difference]: Start difference. First operand 794 states and 1094 transitions. Second operand has 21 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:07:48,473 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] [2023-11-29 02:07:52,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:07:56,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:07:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:59,302 INFO L93 Difference]: Finished difference Result 803 states and 1098 transitions. [2023-11-29 02:07:59,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:07:59,303 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 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 66 [2023-11-29 02:07:59,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:59,305 INFO L225 Difference]: With dead ends: 803 [2023-11-29 02:07:59,305 INFO L226 Difference]: Without dead ends: 802 [2023-11-29 02:07:59,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=220, Invalid=1749, Unknown=11, NotChecked=0, Total=1980 [2023-11-29 02:07:59,305 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 149 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:59,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1579 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1150 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2023-11-29 02:07:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2023-11-29 02:07:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 794. [2023-11-29 02:07:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 676 states have (on average 1.4289940828402368) internal successors, (966), 734 states have internal predecessors, (966), 38 states have call successors, (38), 22 states have call predecessors, (38), 37 states have return successors, (89), 39 states have call predecessors, (89), 38 states have call successors, (89) [2023-11-29 02:07:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1093 transitions. [2023-11-29 02:07:59,370 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1093 transitions. Word has length 66 [2023-11-29 02:07:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:59,371 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1093 transitions. [2023-11-29 02:07:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:07:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1093 transitions. [2023-11-29 02:07:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 02:07:59,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:59,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-11-29 02:07:59,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-11-29 02:07:59,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:59,572 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting func_to_recursive_line_0_to_41_0Err23ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:07:59,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash 930751847, now seen corresponding path program 1 times [2023-11-29 02:07:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:59,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456412180] [2023-11-29 02:07:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:59,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:59,588 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:07:59,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628693873] [2023-11-29 02:07:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:59,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:59,589 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:59,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-11-29 02:07:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:59,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 02:07:59,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:59,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:07:59,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:08:00,573 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 [2023-11-29 02:08:00,576 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 [2023-11-29 02:08:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 02:08:00,595 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:08:00,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:00,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456412180] [2023-11-29 02:08:00,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:08:00,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628693873] [2023-11-29 02:08:00,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628693873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:08:00,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:08:00,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:08:00,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421847440] [2023-11-29 02:08:00,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:08:00,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:08:00,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:00,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:08:00,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:08:00,596 INFO L87 Difference]: Start difference. First operand 794 states and 1093 transitions. Second operand has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:08:00,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:08:00,844 INFO L93 Difference]: Finished difference Result 794 states and 1093 transitions. [2023-11-29 02:08:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:08:00,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (3), 2 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 72 [2023-11-29 02:08:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:08:00,847 INFO L225 Difference]: With dead ends: 794 [2023-11-29 02:08:00,847 INFO L226 Difference]: Without dead ends: 792 [2023-11-29 02:08:00,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:08:00,848 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 173 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:08:00,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 329 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:08:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2023-11-29 02:08:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 792. [2023-11-29 02:08:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 676 states have (on average 1.4082840236686391) internal successors, (952), 732 states have internal predecessors, (952), 38 states have call successors, (38), 22 states have call predecessors, (38), 37 states have return successors, (89), 39 states have call predecessors, (89), 38 states have call successors, (89) [2023-11-29 02:08:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1079 transitions. [2023-11-29 02:08:00,931 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1079 transitions. Word has length 72 [2023-11-29 02:08:00,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:08:00,931 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1079 transitions. [2023-11-29 02:08:00,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:08:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1079 transitions. [2023-11-29 02:08:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 02:08:00,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:08:00,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-29 02:08:00,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-11-29 02:08:01,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:01,133 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting func_to_recursive_line_0_to_41_0Err20ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:08:01,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1211771561, now seen corresponding path program 1 times [2023-11-29 02:08:01,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:01,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736369768] [2023-11-29 02:08:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:01,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:01,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:08:01,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123592698] [2023-11-29 02:08:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:01,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:01,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:01,151 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:01,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-11-29 02:08:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:01,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 02:08:01,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:01,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:08:01,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:08:01,484 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 [2023-11-29 02:08:01,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:08:02,049 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 50 treesize of output 27 [2023-11-29 02:08:02,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-29 02:08:02,583 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 [2023-11-29 02:08:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:02,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:08:03,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:03,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736369768] [2023-11-29 02:08:03,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:08:03,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123592698] [2023-11-29 02:08:03,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123592698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:03,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:08:03,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 21 [2023-11-29 02:08:03,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777697835] [2023-11-29 02:08:03,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:03,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:08:03,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:08:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:08:03,039 INFO L87 Difference]: Start difference. First operand 792 states and 1079 transitions. Second operand has 22 states, 19 states have (on average 6.894736842105263) internal successors, (131), 18 states have internal predecessors, (131), 6 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:08:07,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:11,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:15,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:19,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:23,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:27,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:32,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:36,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:40,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:08:44,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:48,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:52,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:56,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:00,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:09:04,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:09:08,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:12,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:17,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:21,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:25,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:29,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:33,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:37,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:41,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:45,304 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] [2023-11-29 02:09:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:45,318 INFO L93 Difference]: Finished difference Result 908 states and 1194 transitions. [2023-11-29 02:09:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:09:45,335 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 6.894736842105263) internal successors, (131), 18 states have internal predecessors, (131), 6 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 73 [2023-11-29 02:09:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:45,337 INFO L225 Difference]: With dead ends: 908 [2023-11-29 02:09:45,337 INFO L226 Difference]: Without dead ends: 907 [2023-11-29 02:09:45,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:09:45,338 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 365 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 20 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 1852 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:45,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 1852 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 550 Invalid, 25 Unknown, 0 Unchecked, 101.6s Time] [2023-11-29 02:09:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2023-11-29 02:09:45,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 836. [2023-11-29 02:09:45,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 715 states have (on average 1.4027972027972029) internal successors, (1003), 772 states have internal predecessors, (1003), 40 states have call successors, (40), 24 states have call predecessors, (40), 40 states have return successors, (95), 41 states have call predecessors, (95), 40 states have call successors, (95) [2023-11-29 02:09:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1138 transitions. [2023-11-29 02:09:45,428 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1138 transitions. Word has length 73 [2023-11-29 02:09:45,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:45,428 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 1138 transitions. [2023-11-29 02:09:45,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 6.894736842105263) internal successors, (131), 18 states have internal predecessors, (131), 6 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:09:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1138 transitions. [2023-11-29 02:09:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 02:09:45,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:45,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-11-29 02:09:45,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-11-29 02:09:45,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:45,629 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:09:45,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash -299106254, now seen corresponding path program 1 times [2023-11-29 02:09:45,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:45,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649611022] [2023-11-29 02:09:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:45,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:45,645 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:09:45,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998365511] [2023-11-29 02:09:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:45,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:45,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:45,646 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:45,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-11-29 02:09:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:45,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 02:09:45,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:45,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:09:45,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:09:46,359 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 [2023-11-29 02:09:46,379 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 15 treesize of output 7 [2023-11-29 02:09:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:09:46,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:46,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:46,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649611022] [2023-11-29 02:09:46,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:09:46,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998365511] [2023-11-29 02:09:46,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998365511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:46,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:09:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-29 02:09:46,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916006164] [2023-11-29 02:09:46,625 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:46,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:09:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:09:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:09:46,625 INFO L87 Difference]: Start difference. First operand 836 states and 1138 transitions. Second operand has 10 states, 8 states have (on average 8.0) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:09:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:46,994 INFO L93 Difference]: Finished difference Result 883 states and 1183 transitions. [2023-11-29 02:09:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:09:46,995 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 8.0) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 75 [2023-11-29 02:09:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:46,997 INFO L225 Difference]: With dead ends: 883 [2023-11-29 02:09:46,997 INFO L226 Difference]: Without dead ends: 882 [2023-11-29 02:09:46,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:09:46,997 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 113 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:46,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 665 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:09:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-11-29 02:09:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 842. [2023-11-29 02:09:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 719 states have (on average 1.400556328233658) internal successors, (1007), 775 states have internal predecessors, (1007), 40 states have call successors, (40), 24 states have call predecessors, (40), 42 states have return successors, (97), 43 states have call predecessors, (97), 40 states have call successors, (97) [2023-11-29 02:09:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1144 transitions. [2023-11-29 02:09:47,079 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1144 transitions. Word has length 75 [2023-11-29 02:09:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:47,079 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1144 transitions. [2023-11-29 02:09:47,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 8.0) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:09:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1144 transitions. [2023-11-29 02:09:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-29 02:09:47,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:47,080 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-11-29 02:09:47,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-11-29 02:09:47,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:47,280 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:09:47,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:47,281 INFO L85 PathProgramCache]: Analyzing trace with hash -682359150, now seen corresponding path program 1 times [2023-11-29 02:09:47,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:47,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987347079] [2023-11-29 02:09:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:47,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:47,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:09:47,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033140944] [2023-11-29 02:09:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:47,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:47,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:47,299 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:47,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-11-29 02:09:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:47,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 02:09:47,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:47,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:09:47,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:09:48,062 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 [2023-11-29 02:09:48,082 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 [2023-11-29 02:09:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:09:48,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:48,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:48,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987347079] [2023-11-29 02:09:48,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:09:48,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033140944] [2023-11-29 02:09:48,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033140944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:48,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:09:48,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-29 02:09:48,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045990579] [2023-11-29 02:09:48,371 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:48,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:09:48,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:09:48,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:09:48,372 INFO L87 Difference]: Start difference. First operand 842 states and 1144 transitions. Second operand has 10 states, 8 states have (on average 8.125) internal successors, (65), 9 states have internal predecessors, (65), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:09:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:48,666 INFO L93 Difference]: Finished difference Result 882 states and 1182 transitions. [2023-11-29 02:09:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:09:48,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 8.125) internal successors, (65), 9 states have internal predecessors, (65), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 76 [2023-11-29 02:09:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:48,669 INFO L225 Difference]: With dead ends: 882 [2023-11-29 02:09:48,669 INFO L226 Difference]: Without dead ends: 881 [2023-11-29 02:09:48,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:09:48,669 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 137 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:48,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 625 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:09:48,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2023-11-29 02:09:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 843. [2023-11-29 02:09:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 720 states have (on average 1.4) internal successors, (1008), 776 states have internal predecessors, (1008), 40 states have call successors, (40), 24 states have call predecessors, (40), 42 states have return successors, (97), 43 states have call predecessors, (97), 40 states have call successors, (97) [2023-11-29 02:09:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1145 transitions. [2023-11-29 02:09:48,742 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1145 transitions. Word has length 76 [2023-11-29 02:09:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:48,742 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 1145 transitions. [2023-11-29 02:09:48,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 8.125) internal successors, (65), 9 states have internal predecessors, (65), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:09:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1145 transitions. [2023-11-29 02:09:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-29 02:09:48,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:48,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-29 02:09:48,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-11-29 02:09:48,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:48,943 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting func_to_recursive_line_0_to_41_0Err30ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:09:48,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash -686364831, now seen corresponding path program 1 times [2023-11-29 02:09:48,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:48,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368815130] [2023-11-29 02:09:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:48,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:48,960 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:09:48,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115563036] [2023-11-29 02:09:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:48,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:48,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:48,961 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:48,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-11-29 02:09:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:49,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:09:49,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:49,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:09:49,377 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 [2023-11-29 02:09:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:49,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:09:49,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:49,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368815130] [2023-11-29 02:09:49,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:09:49,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115563036] [2023-11-29 02:09:49,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115563036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:09:49,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:09:49,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:09:49,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551354759] [2023-11-29 02:09:49,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:09:49,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:09:49,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:49,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:09:49,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:09:49,390 INFO L87 Difference]: Start difference. First operand 843 states and 1145 transitions. Second operand has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:09:53,409 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] [2023-11-29 02:09:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:53,620 INFO L93 Difference]: Finished difference Result 851 states and 1160 transitions. [2023-11-29 02:09:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:09:53,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2023-11-29 02:09:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:53,622 INFO L225 Difference]: With dead ends: 851 [2023-11-29 02:09:53,622 INFO L226 Difference]: Without dead ends: 850 [2023-11-29 02:09:53,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:09:53,623 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 184 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:53,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 446 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 02:09:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2023-11-29 02:09:53,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 846. [2023-11-29 02:09:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 722 states have (on average 1.3753462603878117) internal successors, (993), 777 states have internal predecessors, (993), 40 states have call successors, (40), 24 states have call predecessors, (40), 44 states have return successors, (106), 45 states have call predecessors, (106), 40 states have call successors, (106) [2023-11-29 02:09:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1139 transitions. [2023-11-29 02:09:53,697 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1139 transitions. Word has length 76 [2023-11-29 02:09:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:53,697 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1139 transitions. [2023-11-29 02:09:53,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:09:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1139 transitions. [2023-11-29 02:09:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-29 02:09:53,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:53,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-11-29 02:09:53,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-11-29 02:09:53,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:53,899 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting func_to_recursive_line_0_to_41_0Err27ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 56 more)] === [2023-11-29 02:09:53,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash -105428629, now seen corresponding path program 1 times [2023-11-29 02:09:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:53,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891811570] [2023-11-29 02:09:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:53,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:53,918 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:09:53,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766907823] [2023-11-29 02:09:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:53,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:53,919 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:53,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ba26e1-591e-43b2-8cc2-cbca90c9045a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-11-29 02:09:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:54,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 02:09:54,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:54,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:09:54,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:09:54,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:09:58,690 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_0_to_41_0_~Y.base_BEFORE_CALL_57 Int) (v_func_to_recursive_line_0_to_41_0_~v.base_BEFORE_CALL_22 Int) (v_func_to_recursive_line_0_to_41_0_~X.base_BEFORE_CALL_46 Int)) (<= (* 2 (select (select |c_#memory_int#2| v_func_to_recursive_line_0_to_41_0_~Y.base_BEFORE_CALL_57) 0)) (+ (select (select |c_#memory_int#4| v_func_to_recursive_line_0_to_41_0_~X.base_BEFORE_CALL_46) 0) (select (select |c_#memory_int#6| v_func_to_recursive_line_0_to_41_0_~v.base_BEFORE_CALL_22) 0)))) is different from true [2023-11-29 02:09:58,758 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 [2023-11-29 02:09:59,410 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 23 treesize of output 15 [2023-11-29 02:09:59,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:59,419 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 49 treesize of output 41 [2023-11-29 02:09:59,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:59,428 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 30 treesize of output 26 [2023-11-29 02:09:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-29 02:09:59,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:59,791 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 42 treesize of output 34 [2023-11-29 02:10:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:10:00,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:00,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891811570] [2023-11-29 02:10:00,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:00,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766907823] [2023-11-29 02:10:00,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766907823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:00,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:10:00,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 31 [2023-11-29 02:10:00,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007844327] [2023-11-29 02:10:00,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:00,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 02:10:00,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:00,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 02:10:00,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=825, Unknown=1, NotChecked=58, Total=992 [2023-11-29 02:10:00,394 INFO L87 Difference]: Start difference. First operand 846 states and 1139 transitions. Second operand has 32 states, 29 states have (on average 4.827586206896552) internal successors, (140), 27 states have internal predecessors, (140), 8 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:10:04,475 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] [2023-11-29 02:10:08,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:10:12,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]