./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/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_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:37:18,857 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:37:18,931 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:37:18,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:37:18,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:37:18,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:37:18,965 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:37:18,966 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:37:18,966 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:37:18,967 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:37:18,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:37:18,968 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:37:18,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:37:18,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:37:18,970 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:37:18,970 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:37:18,971 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:37:18,971 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:37:18,972 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:37:18,972 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:37:18,973 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:37:18,973 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:37:18,974 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:37:18,974 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:37:18,975 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:37:18,975 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:37:18,976 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:37:18,976 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:37:18,976 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:37:18,977 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:37:18,977 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:37:18,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:37:18,978 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:37:18,978 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:37:18,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:37:18,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:37:18,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:37:18,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:37:18,979 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:37:18,980 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:37:18,980 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:37:18,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:37:18,980 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_878275bc-8edf-4fc8-9756-6926294509b2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 [2023-11-29 06:37:19,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:37:19,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:37:19,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:37:19,212 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:37:19,212 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:37:19,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2023-11-29 06:37:21,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:37:22,083 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:37:22,083 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2023-11-29 06:37:22,089 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/data/8c4003333/3e1d51c2571a481fa08c0da461b0166d/FLAG565b44441 [2023-11-29 06:37:22,101 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/data/8c4003333/3e1d51c2571a481fa08c0da461b0166d [2023-11-29 06:37:22,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:37:22,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:37:22,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:37:22,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:37:22,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:37:22,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d039a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22, skipping insertion in model container [2023-11-29 06:37:22,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,133 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:37:22,261 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2023-11-29 06:37:22,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:37:22,289 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:37:22,301 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2023-11-29 06:37:22,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:37:22,323 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:37:22,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22 WrapperNode [2023-11-29 06:37:22,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:37:22,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:37:22,325 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:37:22,325 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:37:22,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,360 INFO L138 Inliner]: procedures = 16, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-29 06:37:22,360 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:37:22,361 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:37:22,361 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:37:22,361 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:37:22,371 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,374 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,387 INFO L175 MemorySlicer]: Split 41 memory accesses to 5 slices as follows [2, 4, 3, 5, 27]. 66 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 1, 2, 2]. [2023-11-29 06:37:22,387 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,388 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,392 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,394 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,396 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,397 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,399 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:37:22,400 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:37:22,400 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:37:22,400 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:37:22,401 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (1/1) ... [2023-11-29 06:37:22,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:37:22,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:22,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:37:22,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:37:22,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:37:22,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:37:22,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:37:22,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:37:22,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:37:22,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 06:37:22,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:37:22,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:37:22,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:37:22,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:37:22,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:37:22,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 06:37:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:37:22,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:37:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:37:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:37:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:37:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:37:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 06:37:22,471 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2023-11-29 06:37:22,471 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2023-11-29 06:37:22,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 06:37:22,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 06:37:22,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:37:22,570 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:37:22,573 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:37:22,734 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:37:22,762 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:37:22,762 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:37:22,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:37:22 BoogieIcfgContainer [2023-11-29 06:37:22,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:37:22,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:37:22,766 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:37:22,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:37:22,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:37:22" (1/3) ... [2023-11-29 06:37:22,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9cd4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:37:22, skipping insertion in model container [2023-11-29 06:37:22,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:22" (2/3) ... [2023-11-29 06:37:22,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9cd4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:37:22, skipping insertion in model container [2023-11-29 06:37:22,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:37:22" (3/3) ... [2023-11-29 06:37:22,772 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps4-ll.c [2023-11-29 06:37:22,791 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:37:22,791 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:37:22,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:37:22,837 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;@3f116799, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:37:22,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:37:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 06:37:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 06:37:22,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:22,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:22,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:22,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash -32795157, now seen corresponding path program 1 times [2023-11-29 06:37:22,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:22,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049130131] [2023-11-29 06:37:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:22,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:22,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:22,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387446332] [2023-11-29 06:37:22,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:22,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:22,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:22,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:23,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:37:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:23,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 06:37:23,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:23,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:37:23,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:37:23,403 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 06:37:23,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:37:23,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:23,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049130131] [2023-11-29 06:37:23,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:23,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387446332] [2023-11-29 06:37:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387446332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:37:23,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:37:23,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:37:23,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988543185] [2023-11-29 06:37:23,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:37:23,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:37:23,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:37:23,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:37:23,445 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:23,705 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2023-11-29 06:37:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:37:23,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 06:37:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:23,714 INFO L225 Difference]: With dead ends: 58 [2023-11-29 06:37:23,714 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 06:37:23,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:37:23,721 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:23,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 80 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:37:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 06:37:23,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-11-29 06:37:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:37:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-29 06:37:23,763 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2023-11-29 06:37:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:23,763 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-29 06:37:23,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-29 06:37:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 06:37:23,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:23,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:23,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:37:23,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 06:37:23,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:23,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:23,967 INFO L85 PathProgramCache]: Analyzing trace with hash -354243652, now seen corresponding path program 1 times [2023-11-29 06:37:23,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:23,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974261977] [2023-11-29 06:37:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:23,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:24,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:24,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731797073] [2023-11-29 06:37:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:24,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:24,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:24,005 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:24,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:37:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:24,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 103 conjunts are in the unsatisfiable core [2023-11-29 06:37:24,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:24,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:37:24,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:37:24,495 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 06:37:24,505 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 06:37:24,704 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 06:37:24,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:37:25,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:25,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974261977] [2023-11-29 06:37:25,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:25,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731797073] [2023-11-29 06:37:25,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731797073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:25,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:37:25,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2023-11-29 06:37:25,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129860636] [2023-11-29 06:37:25,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:25,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:37:25,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:25,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:37:25,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:37:25,114 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 19 states, 15 states have (on average 1.6) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:37:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:25,944 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-11-29 06:37:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:37:25,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.6) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-29 06:37:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:25,949 INFO L225 Difference]: With dead ends: 61 [2023-11-29 06:37:25,949 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 06:37:25,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:37:25,952 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:25,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 130 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:37:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 06:37:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2023-11-29 06:37:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-29 06:37:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-11-29 06:37:25,969 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 18 [2023-11-29 06:37:25,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:25,970 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-11-29 06:37:25,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.6) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:37:25,970 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-11-29 06:37:25,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 06:37:25,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:25,971 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:25,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:37:26,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:26,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:26,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1904549241, now seen corresponding path program 1 times [2023-11-29 06:37:26,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:26,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630441342] [2023-11-29 06:37:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:26,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:26,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:26,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599038878] [2023-11-29 06:37:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:26,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:26,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:26,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:26,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:37:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:26,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-29 06:37:26,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:26,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:37:26,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:37:26,327 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 11 treesize of output 7 [2023-11-29 06:37:26,960 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 06:37:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:27,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:32,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:32,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630441342] [2023-11-29 06:37:32,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:32,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599038878] [2023-11-29 06:37:32,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599038878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:32,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:37:32,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 06:37:32,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795448786] [2023-11-29 06:37:32,318 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:32,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:37:32,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:32,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:37:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=291, Unknown=1, NotChecked=0, Total=342 [2023-11-29 06:37:32,320 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 15 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:37:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:33,188 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2023-11-29 06:37:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:37:33,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-29 06:37:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:33,190 INFO L225 Difference]: With dead ends: 59 [2023-11-29 06:37:33,190 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 06:37:33,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=110, Invalid=645, Unknown=1, NotChecked=0, Total=756 [2023-11-29 06:37:33,192 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:33,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:37:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 06:37:33,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2023-11-29 06:37:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-29 06:37:33,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-11-29 06:37:33,205 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 18 [2023-11-29 06:37:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:33,205 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-11-29 06:37:33,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:37:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-11-29 06:37:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 06:37:33,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:33,206 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:33,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:37:33,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:33,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:33,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:33,409 INFO L85 PathProgramCache]: Analyzing trace with hash -956929769, now seen corresponding path program 1 times [2023-11-29 06:37:33,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:33,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630541298] [2023-11-29 06:37:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:33,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:33,431 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:33,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658623777] [2023-11-29 06:37:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:33,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:33,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:33,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:33,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:37:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:33,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-29 06:37:33,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:33,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:37:33,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:37:41,750 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int#4| |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (and (<= (+ (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) (div (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0)) 4)) 0) (= |c_old(#memory_int#3)| |c_#memory_int#3|) (= (mod (+ (* 3 .cse0 .cse0 .cse0 .cse0) (* 3 .cse0 .cse0) (* 2 .cse0 .cse0 .cse0)) 4) 0) (= |c_old(#memory_int#4)| |c_#memory_int#4|))) is different from true [2023-11-29 06:37:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:53,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:02,257 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_int#4| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|))) (let ((.cse2 (* .cse3 .cse3)) (.cse4 (* .cse3 .cse3 .cse3 .cse3))) (let ((.cse0 (+ .cse2 .cse4 (* .cse3 .cse3 .cse3 2))) (.cse1 (select (select |c_#memory_int#3| |c_ULTIMATE.start_main_~#x~0#1.base|) |c_ULTIMATE.start_main_~#x~0#1.offset|))) (or (not (= (mod .cse0 4) 0)) (< (div .cse0 4) .cse1) (= (* .cse1 4) (+ .cse2 (* (* .cse3 .cse3 .cse3) 2) .cse4)))))) is different from false [2023-11-29 06:38:14,292 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:38:18,298 WARN L876 $PredicateComparison]: unable to prove that (or (= (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 4) (let ((.cse0 (select (select |c_#memory_int#4| |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* .cse0 .cse0 .cse0 .cse0) (* (* .cse0 .cse0 .cse0) 2) (* .cse0 .cse0)))) (let ((.cse3 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse2 (* .cse3 .cse3 .cse3 .cse3)) (.cse4 (* .cse3 .cse3))) (let ((.cse5 (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (.cse1 (+ .cse2 .cse4 (* 2 .cse3 .cse3 .cse3)))) (and (= (mod .cse1 4) 0) (not (= (+ .cse2 (* (* .cse3 .cse3 .cse3) 2) .cse4) (* .cse5 4))) (<= .cse5 (div .cse1 4))))))) is different from true [2023-11-29 06:38:30,326 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:38:42,356 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:38:54,384 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:39:06,578 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:39:10,584 WARN L876 $PredicateComparison]: unable to prove that (or (not (= (+ (* 2 (* |c_func_to_recursive_line_26_to_34_0_#t~mem9| |c_func_to_recursive_line_26_to_34_0_#t~mem11| |c_func_to_recursive_line_26_to_34_0_#t~mem10|)) (* |c_func_to_recursive_line_26_to_34_0_#t~mem13| |c_func_to_recursive_line_26_to_34_0_#t~mem12|) (* |c_func_to_recursive_line_26_to_34_0_#t~mem6| |c_func_to_recursive_line_26_to_34_0_#t~mem5| |c_func_to_recursive_line_26_to_34_0_#t~mem8| |c_func_to_recursive_line_26_to_34_0_#t~mem7|)) (* 4 |c_func_to_recursive_line_26_to_34_0_#t~mem4|))) (= (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 4) (let ((.cse0 (select (select |c_#memory_int#4| |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* .cse0 .cse0 .cse0 .cse0) (* (* .cse0 .cse0 .cse0) 2) (* .cse0 .cse0)))) (let ((.cse3 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse2 (* .cse3 .cse3 .cse3 .cse3)) (.cse4 (* .cse3 .cse3))) (let ((.cse5 (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (.cse1 (+ .cse2 .cse4 (* 2 .cse3 .cse3 .cse3)))) (and (= (mod .cse1 4) 0) (not (= (+ .cse2 (* (* .cse3 .cse3 .cse3) 2) .cse4) (* .cse5 4))) (<= .cse5 (div .cse1 4))))))) is different from true [2023-11-29 06:39:10,615 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 173 treesize of output 165 [2023-11-29 06:39:10,621 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 165 treesize of output 57 [2023-11-29 06:39:22,773 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:39:31,182 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:39:35,195 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base) c_func_to_recursive_line_26_to_34_0_~y.offset))) (or (< 0 (+ (div (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0)) 4) (select (select |c_#memory_int#3| c_func_to_recursive_line_26_to_34_0_~x.base) c_func_to_recursive_line_26_to_34_0_~x.offset))) (not (= (mod (+ (* .cse0 .cse0 3) (* .cse0 .cse0 .cse0 .cse0 3) (* .cse0 .cse0 .cse0 2)) 4) 0)) (= (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 4) (let ((.cse1 (select (select |c_#memory_int#4| |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* .cse1 .cse1 .cse1 .cse1) (* (* .cse1 .cse1 .cse1) 2) (* .cse1 .cse1)))) (let ((.cse4 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse3 (* .cse4 .cse4 .cse4 .cse4)) (.cse5 (* .cse4 .cse4))) (let ((.cse6 (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (.cse2 (+ .cse3 .cse5 (* 2 .cse4 .cse4 .cse4)))) (and (= (mod .cse2 4) 0) (not (= (+ .cse3 (* (* .cse4 .cse4 .cse4) 2) .cse5) (* .cse6 4))) (<= .cse6 (div .cse2 4)))))))) is different from true [2023-11-29 06:39:45,967 WARN L293 SmtUtils]: Spent 6.72s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:39:53,975 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:39:59,228 WARN L293 SmtUtils]: Spent 5.25s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:40:03,271 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (.cse1 (select (select |c_#memory_int#4| |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (or (< 0 (+ .cse0 (div (+ (* (- 2) .cse1 .cse1 .cse1) (* (- 1) .cse1 .cse1 .cse1 .cse1) (* (- 1) .cse1 .cse1)) 4))) (not (= (mod (+ (* 3 .cse1 .cse1 .cse1 .cse1) (* 3 .cse1 .cse1) (* 2 .cse1 .cse1 .cse1)) 4) 0)) (= (* .cse0 4) (+ (* .cse1 .cse1 .cse1 .cse1) (* (* .cse1 .cse1 .cse1) 2) (* .cse1 .cse1))) (let ((.cse4 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse3 (* .cse4 .cse4 .cse4 .cse4)) (.cse5 (* .cse4 .cse4))) (let ((.cse6 (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (.cse2 (+ .cse3 .cse5 (* 2 .cse4 .cse4 .cse4)))) (and (= (mod .cse2 4) 0) (not (= (+ .cse3 (* (* .cse4 .cse4 .cse4) 2) .cse5) (* .cse6 4))) (<= .cse6 (div .cse2 4)))))))) is different from true [2023-11-29 06:40:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:40:03,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:40:03,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630541298] [2023-11-29 06:40:03,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:40:03,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658623777] [2023-11-29 06:40:03,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658623777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:40:03,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:40:03,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-29 06:40:03,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836176558] [2023-11-29 06:40:03,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:40:03,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:40:03,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:40:03,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:40:03,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=234, Unknown=6, NotChecked=210, Total=506 [2023-11-29 06:40:03,276 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 20 states have internal predecessors, (33), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:40:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:40:45,038 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2023-11-29 06:40:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:40:45,039 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 20 states have internal predecessors, (33), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 24 [2023-11-29 06:40:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:40:45,040 INFO L225 Difference]: With dead ends: 63 [2023-11-29 06:40:45,040 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 06:40:45,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 65.8s TimeCoverageRelationStatistics Valid=180, Invalid=824, Unknown=12, NotChecked=390, Total=1406 [2023-11-29 06:40:45,042 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:40:45,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 65 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 182 Invalid, 3 Unknown, 249 Unchecked, 0.3s Time] [2023-11-29 06:40:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 06:40:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-29 06:40:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.1) internal successors, (33), 32 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-29 06:40:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-11-29 06:40:45,053 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 24 [2023-11-29 06:40:45,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:40:45,054 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-11-29 06:40:45,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 20 states have internal predecessors, (33), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:40:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-11-29 06:40:45,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 06:40:45,055 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:40:45,055 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:40:45,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:40:45,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:40:45,256 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:40:45,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:40:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2114078499, now seen corresponding path program 1 times [2023-11-29 06:40:45,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:40:45,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694584553] [2023-11-29 06:40:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:40:45,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:40:45,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:40:45,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116005344] [2023-11-29 06:40:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:40:45,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:40:45,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:40:45,280 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:40:45,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:40:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:40:45,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-29 06:40:45,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:40:45,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:40:45,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:40:45,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:40:45,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:40:45,927 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 06:40:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:40:46,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:40:47,051 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 53 treesize of output 37 [2023-11-29 06:40:47,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2023-11-29 06:41:03,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:41:03,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694584553] [2023-11-29 06:41:03,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:41:03,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116005344] [2023-11-29 06:41:03,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116005344] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:41:03,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:41:03,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 06:41:03,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64733926] [2023-11-29 06:41:03,520 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:41:03,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:41:03,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:41:03,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:41:03,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=571, Unknown=3, NotChecked=0, Total=650 [2023-11-29 06:41:03,521 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:41:04,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:41:04,127 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-11-29 06:41:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:41:04,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-11-29 06:41:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:41:04,129 INFO L225 Difference]: With dead ends: 57 [2023-11-29 06:41:04,129 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 06:41:04,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=133, Invalid=986, Unknown=3, NotChecked=0, Total=1122 [2023-11-29 06:41:04,130 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:41:04,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 42 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:41:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 06:41:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-11-29 06:41:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.088235294117647) internal successors, (37), 36 states have internal predecessors, (37), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2023-11-29 06:41:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2023-11-29 06:41:04,140 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 30 [2023-11-29 06:41:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:41:04,140 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2023-11-29 06:41:04,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:41:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2023-11-29 06:41:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 06:41:04,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:41:04,141 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:41:04,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 06:41:04,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:41:04,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:41:04,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:41:04,342 INFO L85 PathProgramCache]: Analyzing trace with hash -525408077, now seen corresponding path program 1 times [2023-11-29 06:41:04,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:41:04,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052621677] [2023-11-29 06:41:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:41:04,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:41:04,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:41:04,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038645331] [2023-11-29 06:41:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:41:04,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:41:04,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:41:04,360 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:41:04,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:41:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:41:04,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 107 conjunts are in the unsatisfiable core [2023-11-29 06:41:04,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:41:04,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:41:04,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-11-29 06:41:04,891 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 06:41:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:41:05,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:41:11,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:41:11,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052621677] [2023-11-29 06:41:11,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:41:11,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038645331] [2023-11-29 06:41:11,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038645331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:41:11,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:41:11,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 06:41:11,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034524076] [2023-11-29 06:41:11,176 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:41:11,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:41:11,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:41:11,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:41:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=525, Unknown=1, NotChecked=0, Total=600 [2023-11-29 06:41:11,178 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 06:41:15,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:41:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:41:17,114 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-11-29 06:41:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:41:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2023-11-29 06:41:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:41:17,115 INFO L225 Difference]: With dead ends: 61 [2023-11-29 06:41:17,115 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 06:41:17,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=204, Invalid=1277, Unknown=1, NotChecked=0, Total=1482 [2023-11-29 06:41:17,117 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:41:17,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 67 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 356 Invalid, 3 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 06:41:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 06:41:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-29 06:41:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-29 06:41:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-11-29 06:41:17,127 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 36 [2023-11-29 06:41:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:41:17,127 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-11-29 06:41:17,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 06:41:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-11-29 06:41:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 06:41:17,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:41:17,129 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:41:17,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:41:17,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:41:17,330 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:41:17,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:41:17,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1208091455, now seen corresponding path program 2 times [2023-11-29 06:41:17,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:41:17,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782145686] [2023-11-29 06:41:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:41:17,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:41:17,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:41:17,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322866556] [2023-11-29 06:41:17,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:41:17,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:41:17,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:41:17,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:41:17,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:41:17,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:41:17,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:41:17,497 WARN L260 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 216 conjunts are in the unsatisfiable core [2023-11-29 06:41:17,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:41:17,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:41:17,517 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 11 treesize of output 7 [2023-11-29 06:41:17,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:41:17,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:41:22,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:41:23,318 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 06:41:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 06:41:23,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:41:33,580 WARN L293 SmtUtils]: Spent 7.12s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-29 06:41:44,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:41:44,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782145686] [2023-11-29 06:41:44,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:41:44,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322866556] [2023-11-29 06:41:44,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322866556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:41:44,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:41:44,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-11-29 06:41:44,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518065419] [2023-11-29 06:41:44,546 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:41:44,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:41:44,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:41:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:41:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=535, Unknown=2, NotChecked=0, Total=600 [2023-11-29 06:41:44,547 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 21 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:41:49,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:41:56,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:42:00,302 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 [] [2023-11-29 06:42:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:42:00,952 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-11-29 06:42:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:42:00,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2023-11-29 06:42:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:42:00,954 INFO L225 Difference]: With dead ends: 55 [2023-11-29 06:42:00,954 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 06:42:00,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=128, Invalid=1060, Unknown=2, NotChecked=0, Total=1190 [2023-11-29 06:42:00,955 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:42:00,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 57 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 359 Invalid, 2 Unknown, 0 Unchecked, 11.3s Time] [2023-11-29 06:42:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 06:42:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-11-29 06:42:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-29 06:42:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-11-29 06:42:00,968 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 42 [2023-11-29 06:42:00,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:42:00,968 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-11-29 06:42:00,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:42:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-11-29 06:42:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 06:42:00,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:42:00,970 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:00,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:42:01,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 06:42:01,171 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:42:01,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:01,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1965061851, now seen corresponding path program 3 times [2023-11-29 06:42:01,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:42:01,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872576894] [2023-11-29 06:42:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:42:01,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:42:01,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580306169] [2023-11-29 06:42:01,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:42:01,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:42:01,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:42:01,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:42:01,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:42:01,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:42:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:42:01,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 185 conjunts are in the unsatisfiable core [2023-11-29 06:42:01,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:01,704 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 06:42:01,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:42:01,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:42:02,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:42:02,623 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 06:42:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 06:42:02,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:42:04,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:42:04,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872576894] [2023-11-29 06:42:04,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:42:04,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580306169] [2023-11-29 06:42:04,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580306169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:42:04,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:42:04,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-11-29 06:42:04,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918628115] [2023-11-29 06:42:04,797 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:42:04,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:42:04,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:42:04,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:42:04,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:42:04,798 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 06:42:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:42:05,551 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2023-11-29 06:42:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:42:05,551 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 54 [2023-11-29 06:42:05,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:42:05,552 INFO L225 Difference]: With dead ends: 63 [2023-11-29 06:42:05,552 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 06:42:05,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:42:05,554 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:42:05,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 89 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:42:05,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 06:42:05,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2023-11-29 06:42:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-29 06:42:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-11-29 06:42:05,568 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 54 [2023-11-29 06:42:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:42:05,568 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-11-29 06:42:05,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 06:42:05,569 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-11-29 06:42:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 06:42:05,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:42:05,571 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:05,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:42:05,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 06:42:05,772 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:42:05,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1567882761, now seen corresponding path program 4 times [2023-11-29 06:42:05,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:42:05,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084797860] [2023-11-29 06:42:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:05,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:42:05,793 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:42:05,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830137542] [2023-11-29 06:42:05,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:42:05,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:42:05,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:42:05,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:42:05,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:42:06,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:42:06,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:42:06,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 207 conjunts are in the unsatisfiable core [2023-11-29 06:42:06,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:06,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:42:06,408 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 06:42:06,413 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 06:42:07,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:42:07,463 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 06:42:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:42:07,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:42:11,411 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 55 treesize of output 39 [2023-11-29 06:42:11,418 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 39 treesize of output 35 [2023-11-29 06:42:14,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:42:14,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084797860] [2023-11-29 06:42:14,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:42:14,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830137542] [2023-11-29 06:42:14,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830137542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:42:14,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:42:14,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-11-29 06:42:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876631247] [2023-11-29 06:42:14,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:42:14,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:42:14,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:42:14,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:42:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:42:14,030 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 21 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 06:42:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:42:15,011 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2023-11-29 06:42:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:42:15,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 66 [2023-11-29 06:42:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:42:15,013 INFO L225 Difference]: With dead ends: 65 [2023-11-29 06:42:15,013 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 06:42:15,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 06:42:15,014 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:42:15,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 118 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:42:15,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 06:42:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-11-29 06:42:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (20), 11 states have call predecessors, (20), 8 states have call successors, (20) [2023-11-29 06:42:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2023-11-29 06:42:15,029 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 66 [2023-11-29 06:42:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:42:15,029 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2023-11-29 06:42:15,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 06:42:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2023-11-29 06:42:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 06:42:15,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:42:15,031 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:15,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 06:42:15,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:42:15,232 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:42:15,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash -870309937, now seen corresponding path program 2 times [2023-11-29 06:42:15,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:42:15,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210514465] [2023-11-29 06:42:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:15,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:42:15,246 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:42:15,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553369886] [2023-11-29 06:42:15,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:42:15,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:42:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:42:15,248 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:42:15,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:42:15,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:42:15,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:42:15,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 149 conjunts are in the unsatisfiable core [2023-11-29 06:42:15,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:15,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:42:15,705 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 93 treesize of output 80 [2023-11-29 06:43:26,855 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 06:43:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:43:27,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:43:34,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:43:34,850 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 488 treesize of output 487 [2023-11-29 06:43:38,940 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse2 (select .cse1 c_func_to_recursive_line_26_to_34_0_~y.offset))) (let ((.cse4 (* .cse2 .cse2 .cse2 2))) (or (and (= (let ((.cse0 (select (select (store |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse1 c_func_to_recursive_line_26_to_34_0_~y.offset (+ .cse2 1))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* (* .cse0 .cse0 .cse0) 2) (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0))) (let ((.cse3 (* .cse2 .cse2))) (+ (* .cse2 12) (* (div (+ .cse3 (* .cse2 .cse2 .cse2 .cse2) .cse4) 4) 4) (* (* .cse2 .cse2 .cse2) 4) (* .cse3 12) 4))) (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base) (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (not (= (mod (+ (* .cse2 .cse2 3) (* .cse2 .cse2 .cse2 .cse2 3) .cse4) 4) 0)))))) is different from false [2023-11-29 06:43:46,975 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:43:55,018 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse0 (select .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse2 (* 2 .cse0 .cse0 .cse0))) (and (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36| Int)) (or (not (= (let ((.cse1 (* .cse0 .cse0))) (+ (* 4 (div (+ (* .cse0 .cse0 .cse0 .cse0) .cse1 .cse2) 4)) (* (* .cse0 .cse0 .cse0) 4) (* 12 .cse0) (* 12 .cse1) 4)) (let ((.cse3 (select (select (store |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ .cse0 1))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36|))) (+ (* .cse3 .cse3 .cse3 .cse3) (* (* .cse3 .cse3 .cse3) 2) (* .cse3 .cse3))))) (= (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 4) (let ((.cse5 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36|))) (+ (* (* .cse5 .cse5 .cse5) 2) (* .cse5 .cse5) (* .cse5 .cse5 .cse5 .cse5)))))) (or (= (mod (+ (* 3 .cse0 .cse0 .cse0 .cse0) (* 3 .cse0 .cse0) .cse2) 4) 0) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_17| Int)) (= (let ((.cse6 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36|))) (+ (* (* .cse6 .cse6 .cse6) 2) (* .cse6 .cse6) (* .cse6 .cse6 .cse6 .cse6))) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_17|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_17|) 4)))))))) is different from true [2023-11-29 06:44:03,036 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:44:19,403 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:44:27,464 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (let ((.cse8 (select (select |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base) c_func_to_recursive_line_26_to_34_0_~y.offset))) (+ (* .cse8 .cse8) (* .cse8 .cse8 .cse8 .cse8) (* .cse8 .cse8 .cse8 2))))) (or (let ((.cse4 (select |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse0 (select .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse2 (* 2 .cse0 .cse0 .cse0))) (and (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36| Int)) (or (not (= (let ((.cse1 (* .cse0 .cse0))) (+ (* 4 (div (+ (* .cse0 .cse0 .cse0 .cse0) .cse1 .cse2) 4)) (* (* .cse0 .cse0 .cse0) 4) (* 12 .cse0) (* 12 .cse1) 4)) (let ((.cse3 (select (select (store |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ .cse0 1))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36|))) (+ (* .cse3 .cse3 .cse3 .cse3) (* (* .cse3 .cse3 .cse3) 2) (* .cse3 .cse3))))) (= (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 4) (let ((.cse5 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36|))) (+ (* (* .cse5 .cse5 .cse5) 2) (* .cse5 .cse5) (* .cse5 .cse5 .cse5 .cse5)))))) (or (= (mod (+ (* 3 .cse0 .cse0 .cse0 .cse0) (* 3 .cse0 .cse0) .cse2) 4) 0) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_17| Int)) (= (let ((.cse6 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36|))) (+ (* (* .cse6 .cse6 .cse6) 2) (* .cse6 .cse6) (* .cse6 .cse6 .cse6 .cse6))) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_17|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_17|) 4)))))))) (not (= 0 (mod .cse7 4))) (< (div .cse7 4) (select (select |c_#memory_int#3| c_func_to_recursive_line_26_to_34_0_~x.base) c_func_to_recursive_line_26_to_34_0_~x.offset)))) is different from false [2023-11-29 06:44:31,467 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse7 (let ((.cse8 (select (select |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base) c_func_to_recursive_line_26_to_34_0_~y.offset))) (+ (* .cse8 .cse8) (* .cse8 .cse8 .cse8 .cse8) (* .cse8 .cse8 .cse8 2))))) (or (let ((.cse4 (select |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse0 (select .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse2 (* 2 .cse0 .cse0 .cse0))) (and (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36| Int)) (or (not (= (let ((.cse1 (* .cse0 .cse0))) (+ (* 4 (div (+ (* .cse0 .cse0 .cse0 .cse0) .cse1 .cse2) 4)) (* (* .cse0 .cse0 .cse0) 4) (* 12 .cse0) (* 12 .cse1) 4)) (let ((.cse3 (select (select (store |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ .cse0 1))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36|))) (+ (* .cse3 .cse3 .cse3 .cse3) (* (* .cse3 .cse3 .cse3) 2) (* .cse3 .cse3))))) (= (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 4) (let ((.cse5 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36|))) (+ (* (* .cse5 .cse5 .cse5) 2) (* .cse5 .cse5) (* .cse5 .cse5 .cse5 .cse5)))))) (or (= (mod (+ (* 3 .cse0 .cse0 .cse0 .cse0) (* 3 .cse0 .cse0) .cse2) 4) 0) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_17| Int)) (= (let ((.cse6 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_36|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_36|))) (+ (* (* .cse6 .cse6 .cse6) 2) (* .cse6 .cse6) (* .cse6 .cse6 .cse6 .cse6))) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_17|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_17|) 4)))))))) (not (= 0 (mod .cse7 4))) (< (div .cse7 4) (select (select |c_#memory_int#3| c_func_to_recursive_line_26_to_34_0_~x.base) c_func_to_recursive_line_26_to_34_0_~x.offset)))) is different from true [2023-11-29 06:44:31,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:31,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210514465] [2023-11-29 06:44:31,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:31,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553369886] [2023-11-29 06:44:31,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553369886] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:44:31,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:44:31,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-29 06:44:31,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183329827] [2023-11-29 06:44:31,470 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:31,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:44:31,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:44:31,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=577, Unknown=7, NotChecked=150, Total=812 [2023-11-29 06:44:31,471 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 22 states, 16 states have (on average 1.8125) internal successors, (29), 19 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 06:44:34,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:44:38,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:44:42,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:44:44,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:44:47,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:44:49,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:44:51,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:44:53,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:44:59,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:45:01,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:45:04,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:45:06,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:45:09,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:45:13,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:45:18,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:45:22,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:45:38,229 WARN L293 SmtUtils]: Spent 15.82s on a formula simplification. DAG size of input: 68 DAG size of output: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:45:46,772 WARN L539 Checker$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 06:45:50,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:45:57,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:00,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:04,348 WARN L539 Checker$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 06:46:06,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:09,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:13,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:15,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:46:17,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:21,819 WARN L539 Checker$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 06:46:24,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:28,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:30,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:33,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:46:37,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:46:39,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:46:41,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:46,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:50,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:46:54,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:46:58,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:47:01,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:47:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:47:01,413 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2023-11-29 06:47:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:47:01,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.8125) internal successors, (29), 19 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 48 [2023-11-29 06:47:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:47:01,415 INFO L225 Difference]: With dead ends: 69 [2023-11-29 06:47:01,415 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 06:47:01,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 80.3s TimeCoverageRelationStatistics Valid=183, Invalid=1228, Unknown=7, NotChecked=222, Total=1640 [2023-11-29 06:47:01,416 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 12 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:47:01,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 93 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 346 Invalid, 17 Unknown, 0 Unchecked, 122.5s Time] [2023-11-29 06:47:01,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 06:47:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-29 06:47:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (18), 11 states have call predecessors, (18), 8 states have call successors, (18) [2023-11-29 06:47:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-11-29 06:47:01,427 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 48 [2023-11-29 06:47:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:47:01,427 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-11-29 06:47:01,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.8125) internal successors, (29), 19 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 06:47:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-11-29 06:47:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-29 06:47:01,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:47:01,429 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:47:01,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 06:47:01,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:01,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:47:01,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1879374701, now seen corresponding path program 5 times [2023-11-29 06:47:01,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:01,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117667901] [2023-11-29 06:47:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:01,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:47:01,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227002267] [2023-11-29 06:47:01,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:47:01,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:01,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:01,652 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:01,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:47:02,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 06:47:02,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:47:02,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 237 conjunts are in the unsatisfiable core [2023-11-29 06:47:02,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:02,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:47:02,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:47:02,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:47:03,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:47:03,652 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 06:47:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-29 06:47:03,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:47:09,285 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 55 treesize of output 39 [2023-11-29 06:47:09,293 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 39 treesize of output 35 [2023-11-29 06:47:14,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:14,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117667901] [2023-11-29 06:47:14,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:47:14,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227002267] [2023-11-29 06:47:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227002267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:47:14,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:47:14,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-29 06:47:14,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558919125] [2023-11-29 06:47:14,385 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:47:14,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:47:14,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:47:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:47:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:47:14,386 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-29 06:47:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:47:15,483 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2023-11-29 06:47:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:47:15,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 78 [2023-11-29 06:47:15,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:47:15,484 INFO L225 Difference]: With dead ends: 67 [2023-11-29 06:47:15,484 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 06:47:15,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 06:47:15,486 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:47:15,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 129 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 06:47:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 06:47:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2023-11-29 06:47:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 11 states have return successors, (21), 12 states have call predecessors, (21), 8 states have call successors, (21) [2023-11-29 06:47:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2023-11-29 06:47:15,495 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 78 [2023-11-29 06:47:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:47:15,496 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2023-11-29 06:47:15,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-29 06:47:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2023-11-29 06:47:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 06:47:15,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:47:15,497 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:47:15,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:47:15,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:15,698 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:47:15,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:15,698 INFO L85 PathProgramCache]: Analyzing trace with hash -743936405, now seen corresponding path program 3 times [2023-11-29 06:47:15,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:15,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853949504] [2023-11-29 06:47:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:15,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:15,715 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:47:15,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254289417] [2023-11-29 06:47:15,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:47:15,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:15,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:15,716 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:15,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:47:16,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:47:16,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:47:16,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 136 conjunts are in the unsatisfiable core [2023-11-29 06:47:16,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:16,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:47:16,232 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 33 treesize of output 24 [2023-11-29 06:47:16,705 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 67 treesize of output 59 [2023-11-29 06:47:16,709 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 119 treesize of output 47 [2023-11-29 06:47:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 18 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 06:47:16,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:47:18,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:47:18,153 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 312 treesize of output 311 [2023-11-29 06:47:18,160 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 210 treesize of output 138 [2023-11-29 06:47:18,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:47:18,673 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 312 treesize of output 311 [2023-11-29 06:47:18,679 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 210 treesize of output 138 [2023-11-29 06:47:50,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:50,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853949504] [2023-11-29 06:47:50,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:47:50,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254289417] [2023-11-29 06:47:50,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254289417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:47:50,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:47:50,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 06:47:50,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026626853] [2023-11-29 06:47:50,276 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:47:50,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:47:50,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:47:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:47:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=521, Unknown=3, NotChecked=0, Total=600 [2023-11-29 06:47:50,278 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 19 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 06:47:54,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:47:55,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:47:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:47:57,026 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-11-29 06:47:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:47:57,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 60 [2023-11-29 06:47:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:47:57,028 INFO L225 Difference]: With dead ends: 63 [2023-11-29 06:47:57,028 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 06:47:57,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=218, Invalid=1261, Unknown=3, NotChecked=0, Total=1482 [2023-11-29 06:47:57,029 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:47:57,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 196 Invalid, 3 Unknown, 0 Unchecked, 6.0s Time] [2023-11-29 06:47:57,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 06:47:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-29 06:47:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (13), 10 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-29 06:47:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-11-29 06:47:57,043 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 60 [2023-11-29 06:47:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:47:57,043 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-11-29 06:47:57,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 06:47:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-11-29 06:47:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 06:47:57,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:47:57,045 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:47:57,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:47:57,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:57,245 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:47:57,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:57,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1381245265, now seen corresponding path program 6 times [2023-11-29 06:47:57,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:57,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414243528] [2023-11-29 06:47:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:57,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:57,267 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:47:57,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810980538] [2023-11-29 06:47:57,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:47:57,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:57,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:57,268 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:57,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:47:58,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 06:47:58,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:47:58,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 277 conjunts are in the unsatisfiable core [2023-11-29 06:47:58,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:58,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:47:58,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:47:58,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:47:59,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:48:00,416 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 06:48:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 26 proven. 76 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2023-11-29 06:48:00,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:06,469 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 55 treesize of output 39 [2023-11-29 06:48:06,475 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 39 treesize of output 35 [2023-11-29 06:48:09,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:09,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414243528] [2023-11-29 06:48:09,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:48:09,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810980538] [2023-11-29 06:48:09,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810980538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:09,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:48:09,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-29 06:48:09,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572529237] [2023-11-29 06:48:09,516 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:09,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:48:09,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:09,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:48:09,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:48:09,518 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 06:48:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:10,484 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-11-29 06:48:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:48:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 90 [2023-11-29 06:48:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:10,485 INFO L225 Difference]: With dead ends: 55 [2023-11-29 06:48:10,485 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 06:48:10,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 06:48:10,487 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:10,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 136 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:48:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 06:48:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-29 06:48:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (14), 11 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-29 06:48:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-11-29 06:48:10,497 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 90 [2023-11-29 06:48:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:10,498 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-11-29 06:48:10,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 06:48:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-11-29 06:48:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-29 06:48:10,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:10,499 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:10,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:48:10,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:10,699 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:10,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash 711258187, now seen corresponding path program 7 times [2023-11-29 06:48:10,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:10,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655377360] [2023-11-29 06:48:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:10,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:10,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:48:10,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750292673] [2023-11-29 06:48:10,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:48:10,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:10,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:10,722 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:10,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:48:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:11,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 299 conjunts are in the unsatisfiable core [2023-11-29 06:48:11,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:11,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:48:11,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:48:11,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:48:12,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:48:13,026 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 06:48:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-11-29 06:48:13,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:20,637 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 55 treesize of output 39 [2023-11-29 06:48:20,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2023-11-29 06:48:24,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:24,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655377360] [2023-11-29 06:48:24,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:48:24,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750292673] [2023-11-29 06:48:24,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750292673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:24,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:48:24,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-29 06:48:24,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837259693] [2023-11-29 06:48:24,562 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:24,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:48:24,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:24,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:48:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:48:24,564 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 24 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 06:48:25,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:25,836 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-11-29 06:48:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:48:25,836 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) Word has length 102 [2023-11-29 06:48:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:25,837 INFO L225 Difference]: With dead ends: 57 [2023-11-29 06:48:25,837 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 06:48:25,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 06:48:25,838 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:25,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 168 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 06:48:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 06:48:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-29 06:48:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 11 states have return successors, (15), 12 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-29 06:48:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-11-29 06:48:25,850 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 102 [2023-11-29 06:48:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:25,850 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-11-29 06:48:25,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 06:48:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-11-29 06:48:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-29 06:48:25,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:25,852 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:25,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 06:48:26,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:26,053 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:26,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2123064985, now seen corresponding path program 8 times [2023-11-29 06:48:26,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:26,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670409551] [2023-11-29 06:48:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:26,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:26,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:48:26,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176030419] [2023-11-29 06:48:26,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:48:26,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:26,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:26,081 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:26,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:48:26,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:48:26,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:26,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 339 conjunts are in the unsatisfiable core [2023-11-29 06:48:26,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:26,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:48:26,923 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 06:48:26,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:48:27,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:48:28,811 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 06:48:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 52 proven. 108 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-11-29 06:48:28,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:37,475 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 55 treesize of output 51 [2023-11-29 06:48:37,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2023-11-29 06:48:42,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:42,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670409551] [2023-11-29 06:48:42,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:48:42,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176030419] [2023-11-29 06:48:42,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176030419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:42,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:48:42,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-11-29 06:48:42,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205438442] [2023-11-29 06:48:42,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:42,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:48:42,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:42,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:48:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:48:42,742 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 11 states have return successors, (12), 11 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-29 06:48:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:44,073 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2023-11-29 06:48:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:48:44,074 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 11 states have return successors, (12), 11 states have call predecessors, (12), 5 states have call successors, (12) Word has length 114 [2023-11-29 06:48:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:44,075 INFO L225 Difference]: With dead ends: 59 [2023-11-29 06:48:44,075 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 06:48:44,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 06:48:44,076 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:44,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 188 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:48:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 06:48:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-29 06:48:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 12 states have return successors, (16), 13 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-29 06:48:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-11-29 06:48:44,086 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 114 [2023-11-29 06:48:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:44,086 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-11-29 06:48:44,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 11 states have return successors, (12), 11 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-29 06:48:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-11-29 06:48:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-29 06:48:44,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:44,087 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:44,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:48:44,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:48:44,288 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:44,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2001651197, now seen corresponding path program 9 times [2023-11-29 06:48:44,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:44,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958358871] [2023-11-29 06:48:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:44,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:44,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:48:44,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888560028] [2023-11-29 06:48:44,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:48:44,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:44,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:44,328 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:44,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878275bc-8edf-4fc8-9756-6926294509b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:48:57,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-29 06:48:57,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:57,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 470 conjunts are in the unsatisfiable core [2023-11-29 06:48:57,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:57,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:48:57,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:48:57,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 06:48:57,138 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 15 treesize of output 1 [2023-11-29 06:49:31,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:50:52,198 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 06:51:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 48 proven. 289 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-11-29 06:51:04,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:51:50,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:50,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958358871] [2023-11-29 06:51:50,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:51:50,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888560028] [2023-11-29 06:51:50,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888560028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:51:50,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:51:50,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2023-11-29 06:51:50,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019743105] [2023-11-29 06:51:50,473 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:51:50,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 06:51:50,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:50,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 06:51:50,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1223, Unknown=6, NotChecked=0, Total=1332 [2023-11-29 06:51:50,475 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 29 states have internal predecessors, (38), 11 states have call successors, (11), 4 states have call predecessors, (11), 12 states have return successors, (15), 14 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-29 06:51:54,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:51:57,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:51:59,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:52:02,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:52:06,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:52:09,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:52:11,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:52:13,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:52:17,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:52:19,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 06:52:34,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []