./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ --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 ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:34:12,459 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:34:12,532 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:34:12,538 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:34:12,539 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:34:12,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:34:12,564 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:34:12,565 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:34:12,565 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:34:12,566 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:34:12,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:34:12,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:34:12,568 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:34:12,569 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:34:12,569 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:34:12,570 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:34:12,570 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:34:12,571 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:34:12,572 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:34:12,572 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:34:12,573 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:34:12,574 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:34:12,574 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:34:12,575 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:34:12,575 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:34:12,576 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:34:12,577 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:34:12,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:34:12,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:34:12,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:34:12,579 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:34:12,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:12,580 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:34:12,580 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:34:12,581 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:34:12,581 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:34:12,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:34:12,582 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:34:12,583 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:34:12,583 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:34:12,583 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:34:12,584 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:34:12,584 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_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af [2023-11-23 22:34:12,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:34:12,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:34:12,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:34:12,937 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:34:12,938 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:34:12,939 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-11-23 22:34:18,204 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:34:18,383 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:34:18,384 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-11-23 22:34:18,392 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/data/916388cbd/ea7f1dff0c2847189b692f67ba9db001/FLAG3ffe5363b [2023-11-23 22:34:18,407 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/data/916388cbd/ea7f1dff0c2847189b692f67ba9db001 [2023-11-23 22:34:18,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:34:18,411 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:34:18,412 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:18,412 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:34:18,418 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:34:18,419 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48ed145d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18, skipping insertion in model container [2023-11-23 22:34:18,420 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,444 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:34:18,699 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_b5146e26-dc32-4284-a1ab-409938d52d64/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2023-11-23 22:34:18,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:18,751 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:34:18,765 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_b5146e26-dc32-4284-a1ab-409938d52d64/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2023-11-23 22:34:18,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:18,808 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:34:18,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18 WrapperNode [2023-11-23 22:34:18,811 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:18,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:18,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:34:18,815 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:34:18,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,872 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-11-23 22:34:18,872 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:18,873 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:34:18,873 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:34:18,873 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:34:18,882 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,885 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,898 INFO L189 HeapSplitter]: Split 33 memory accesses to 5 slices as follows [2, 12, 8, 9, 2] [2023-11-23 22:34:18,899 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,899 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,905 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,918 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,920 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:34:18,934 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:34:18,934 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:34:18,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:34:18,935 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (1/1) ... [2023-11-23 22:34:18,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:18,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:18,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:34:18,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:34:19,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:34:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:34:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:34:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:34:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:34:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:34:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:34:19,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:34:19,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:34:19,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:34:19,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:34:19,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:34:19,002 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2023-11-23 22:34:19,002 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2023-11-23 22:34:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:34:19,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:34:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:34:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:34:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:34:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:34:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:34:19,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 22:34:19,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 22:34:19,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:34:19,112 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:34:19,114 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:34:19,306 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:34:19,367 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:34:19,367 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:34:19,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:19 BoogieIcfgContainer [2023-11-23 22:34:19,368 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:34:19,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:34:19,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:34:19,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:34:19,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:34:18" (1/3) ... [2023-11-23 22:34:19,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383c020f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:19, skipping insertion in model container [2023-11-23 22:34:19,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:18" (2/3) ... [2023-11-23 22:34:19,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383c020f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:19, skipping insertion in model container [2023-11-23 22:34:19,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:19" (3/3) ... [2023-11-23 22:34:19,378 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2023-11-23 22:34:19,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:34:19,398 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:34:19,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:34:19,449 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;@9c3cbcf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:34:19,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:34:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 22:34:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 22:34:19,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:19,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:19,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:19,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:19,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1408384077, now seen corresponding path program 1 times [2023-11-23 22:34:19,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:19,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632377996] [2023-11-23 22:34:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:19,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:20,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:20,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632377996] [2023-11-23 22:34:20,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632377996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:20,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:20,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:34:20,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319738389] [2023-11-23 22:34:20,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:20,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:34:20,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:20,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:34:20,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:34:20,459 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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) [2023-11-23 22:34:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:20,859 INFO L93 Difference]: Finished difference Result 76 states and 113 transitions. [2023-11-23 22:34:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:34:20,863 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 [2023-11-23 22:34:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:20,872 INFO L225 Difference]: With dead ends: 76 [2023-11-23 22:34:20,873 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 22:34:20,878 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 [2023-11-23 22:34:20,885 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:20,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 106 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:34:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 22:34:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-11-23 22:34:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:34:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-11-23 22:34:20,934 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 8 [2023-11-23 22:34:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:20,934 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-11-23 22:34:20,934 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) [2023-11-23 22:34:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-11-23 22:34:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 22:34:20,935 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:20,936 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:20,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:34:20,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:20,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1735781632, now seen corresponding path program 1 times [2023-11-23 22:34:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:20,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394641872] [2023-11-23 22:34:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:20,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:20,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:20,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828844352] [2023-11-23 22:34:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:20,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:20,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:20,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:20,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:34:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:21,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-23 22:34:21,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:21,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:34:21,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:21,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:21,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394641872] [2023-11-23 22:34:21,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828844352] [2023-11-23 22:34:21,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828844352] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:21,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:34:21,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-11-23 22:34:21,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310299666] [2023-11-23 22:34:21,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:21,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:34:21,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:21,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:34:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:34:21,707 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:34:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:22,026 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2023-11-23 22:34:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:34:22,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-23 22:34:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:22,028 INFO L225 Difference]: With dead ends: 53 [2023-11-23 22:34:22,028 INFO L226 Difference]: Without dead ends: 51 [2023-11-23 22:34:22,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:34:22,030 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:22,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 110 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:34:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-23 22:34:22,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-11-23 22:34:22,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:34:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-11-23 22:34:22,047 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 14 [2023-11-23 22:34:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:22,047 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-11-23 22:34:22,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:34:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-11-23 22:34:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 22:34:22,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:22,049 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:22,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:22,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:22,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:22,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:22,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1054740085, now seen corresponding path program 1 times [2023-11-23 22:34:22,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:22,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252577499] [2023-11-23 22:34:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:22,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:22,305 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:22,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14490858] [2023-11-23 22:34:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:22,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:22,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:22,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:22,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:34:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:22,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-23 22:34:22,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:22,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:22,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:34:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:22,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:23,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2023-11-23 22:34:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:34:23,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:23,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252577499] [2023-11-23 22:34:23,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:23,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14490858] [2023-11-23 22:34:23,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14490858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:34:23,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:23,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-11-23 22:34:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850053279] [2023-11-23 22:34:23,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:23,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 22:34:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 22:34:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-11-23 22:34:23,349 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 22:34:28,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-23 22:34:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:28,962 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2023-11-23 22:34:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 22:34:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-11-23 22:34:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:28,967 INFO L225 Difference]: With dead ends: 82 [2023-11-23 22:34:28,967 INFO L226 Difference]: Without dead ends: 80 [2023-11-23 22:34:28,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2023-11-23 22:34:28,977 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:28,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 126 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 403 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-11-23 22:34:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-23 22:34:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2023-11-23 22:34:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 51 states have internal predecessors, (53), 18 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2023-11-23 22:34:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2023-11-23 22:34:29,025 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 20 [2023-11-23 22:34:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:29,026 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2023-11-23 22:34:29,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 22:34:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2023-11-23 22:34:29,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 22:34:29,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:29,028 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:29,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:29,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:29,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:29,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1398908834, now seen corresponding path program 1 times [2023-11-23 22:34:29,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:29,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252482090] [2023-11-23 22:34:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:29,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:29,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:29,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649150318] [2023-11-23 22:34:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:29,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:29,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:29,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:29,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:34:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:29,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 22:34:29,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:29,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-11-23 22:34:29,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-11-23 22:34:29,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-23 22:34:29,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 22:34:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:34:29,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 22:34:32,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:32,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252482090] [2023-11-23 22:34:32,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:32,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649150318] [2023-11-23 22:34:32,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649150318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:34:32,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:32,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2023-11-23 22:34:32,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418077198] [2023-11-23 22:34:32,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:32,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:34:32,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:32,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:34:32,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=145, Unknown=1, NotChecked=0, Total=182 [2023-11-23 22:34:32,006 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 22:34:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:32,961 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2023-11-23 22:34:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 22:34:32,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2023-11-23 22:34:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:32,964 INFO L225 Difference]: With dead ends: 87 [2023-11-23 22:34:32,964 INFO L226 Difference]: Without dead ends: 85 [2023-11-23 22:34:32,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=98, Invalid=363, Unknown=1, NotChecked=0, Total=462 [2023-11-23 22:34:32,966 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:32,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 131 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:34:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-23 22:34:32,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-23 22:34:32,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 56 states have internal predecessors, (58), 18 states have call successors, (18), 10 states have call predecessors, (18), 13 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2023-11-23 22:34:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2023-11-23 22:34:32,994 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 30 [2023-11-23 22:34:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:32,994 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2023-11-23 22:34:32,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 22:34:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2023-11-23 22:34:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 22:34:32,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:32,996 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:33,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:33,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:33,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:33,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:33,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1438102184, now seen corresponding path program 1 times [2023-11-23 22:34:33,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:33,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204680798] [2023-11-23 22:34:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:33,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:33,228 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:33,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952781934] [2023-11-23 22:34:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:33,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:33,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:33,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:33,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:34:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:33,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:34:33,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:33,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:33,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:34:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:34:33,614 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:33,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:33,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204680798] [2023-11-23 22:34:33,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:33,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952781934] [2023-11-23 22:34:33,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952781934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:33,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:33,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:34:33,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393804853] [2023-11-23 22:34:33,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:33,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:34:33,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:33,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:34:33,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:34:33,617 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:34:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:34,025 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2023-11-23 22:34:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:34:34,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-11-23 22:34:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:34,028 INFO L225 Difference]: With dead ends: 91 [2023-11-23 22:34:34,028 INFO L226 Difference]: Without dead ends: 89 [2023-11-23 22:34:34,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:34:34,029 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:34,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:34:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-23 22:34:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-23 22:34:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 59 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 14 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2023-11-23 22:34:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2023-11-23 22:34:34,056 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 30 [2023-11-23 22:34:34,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:34,057 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2023-11-23 22:34:34,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:34:34,058 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2023-11-23 22:34:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 22:34:34,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:34,059 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:34,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:34,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:34,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:34,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1912282705, now seen corresponding path program 2 times [2023-11-23 22:34:34,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:34,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296199085] [2023-11-23 22:34:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:34,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:34,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:34,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327151085] [2023-11-23 22:34:34,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:34:34,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:34,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:34,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:34,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:34:34,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:34:34,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:34:34,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-23 22:34:34,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:34,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:34,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:34,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:35,293 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 7 treesize of output 3 [2023-11-23 22:34:35,299 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 [2023-11-23 22:34:35,309 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 [2023-11-23 22:34:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 22:34:35,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 22:34:36,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:36,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296199085] [2023-11-23 22:34:36,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:36,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327151085] [2023-11-23 22:34:36,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327151085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:34:36,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:36,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-23 22:34:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518858870] [2023-11-23 22:34:36,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:36,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 22:34:36,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 22:34:36,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-11-23 22:34:36,902 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 25 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 10 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-23 22:34:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:40,594 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2023-11-23 22:34:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-23 22:34:40,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 10 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 36 [2023-11-23 22:34:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:40,596 INFO L225 Difference]: With dead ends: 117 [2023-11-23 22:34:40,597 INFO L226 Difference]: Without dead ends: 115 [2023-11-23 22:34:40,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=365, Invalid=2085, Unknown=0, NotChecked=0, Total=2450 [2023-11-23 22:34:40,600 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 118 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:40,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 224 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 22:34:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-23 22:34:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2023-11-23 22:34:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 74 states have internal predecessors, (77), 21 states have call successors, (21), 15 states have call predecessors, (21), 18 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2023-11-23 22:34:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2023-11-23 22:34:40,640 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 36 [2023-11-23 22:34:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:40,641 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2023-11-23 22:34:40,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 10 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-23 22:34:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2023-11-23 22:34:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 22:34:40,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:40,643 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:40,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:40,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:34:40,857 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:40,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:40,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1300709659, now seen corresponding path program 1 times [2023-11-23 22:34:40,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:40,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898574814] [2023-11-23 22:34:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:40,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:40,885 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:40,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417003224] [2023-11-23 22:34:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:40,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:40,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:40,902 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:40,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:34:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:41,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:34:41,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:41,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:41,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:34:41,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:41,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898574814] [2023-11-23 22:34:41,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417003224] [2023-11-23 22:34:41,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417003224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:41,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:34:41,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-23 22:34:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029771952] [2023-11-23 22:34:41,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:41,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:34:41,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:34:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:34:41,676 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 22:34:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:42,235 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2023-11-23 22:34:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:34:42,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-11-23 22:34:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:42,238 INFO L225 Difference]: With dead ends: 119 [2023-11-23 22:34:42,238 INFO L226 Difference]: Without dead ends: 115 [2023-11-23 22:34:42,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:34:42,240 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:42,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 55 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 151 Invalid, 2 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:34:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-23 22:34:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2023-11-23 22:34:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 21 states have call successors, (21), 16 states have call predecessors, (21), 18 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2023-11-23 22:34:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2023-11-23 22:34:42,274 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 36 [2023-11-23 22:34:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:42,275 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2023-11-23 22:34:42,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 22:34:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2023-11-23 22:34:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 22:34:42,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:42,278 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:42,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:42,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:34:42,482 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:42,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1658463312, now seen corresponding path program 1 times [2023-11-23 22:34:42,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:42,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545736733] [2023-11-23 22:34:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:42,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:42,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922528902] [2023-11-23 22:34:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:42,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:42,518 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:42,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:34:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:42,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 22:34:42,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:42,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:34:42,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:34:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 22:34:43,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:43,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:43,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545736733] [2023-11-23 22:34:43,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:43,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922528902] [2023-11-23 22:34:43,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922528902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:43,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:34:43,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-23 22:34:43,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619562804] [2023-11-23 22:34:43,575 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:43,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:34:43,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:34:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:34:43,577 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 22:34:44,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:44,032 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2023-11-23 22:34:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:34:44,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-11-23 22:34:44,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:44,034 INFO L225 Difference]: With dead ends: 115 [2023-11-23 22:34:44,034 INFO L226 Difference]: Without dead ends: 95 [2023-11-23 22:34:44,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:34:44,036 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:44,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 54 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 134 Invalid, 3 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:34:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-23 22:34:44,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-23 22:34:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 63 states have internal predecessors, (65), 18 states have call successors, (18), 13 states have call predecessors, (18), 15 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-23 22:34:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2023-11-23 22:34:44,057 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 42 [2023-11-23 22:34:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:44,057 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2023-11-23 22:34:44,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 22:34:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2023-11-23 22:34:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 22:34:44,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:44,059 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:44,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:44,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 22:34:44,278 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:44,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash 983693574, now seen corresponding path program 1 times [2023-11-23 22:34:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:44,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825627908] [2023-11-23 22:34:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:44,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:44,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:44,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891433476] [2023-11-23 22:34:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:44,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:44,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:44,296 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:44,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:34:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:44,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-23 22:34:44,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:44,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:45,066 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 24 treesize of output 13 [2023-11-23 22:34:45,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 [2023-11-23 22:34:45,754 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 [2023-11-23 22:34:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 22:34:45,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:47,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:47,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825627908] [2023-11-23 22:34:47,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:47,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891433476] [2023-11-23 22:34:47,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891433476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:47,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:34:47,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-23 22:34:47,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848718266] [2023-11-23 22:34:47,403 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:47,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 22:34:47,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 22:34:47,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-11-23 22:34:47,407 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-23 22:34:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:49,045 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2023-11-23 22:34:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 22:34:49,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2023-11-23 22:34:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:49,047 INFO L225 Difference]: With dead ends: 101 [2023-11-23 22:34:49,047 INFO L226 Difference]: Without dead ends: 99 [2023-11-23 22:34:49,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 22:34:49,049 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:49,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 84 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 22:34:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-23 22:34:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-23 22:34:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.0625) internal successors, (68), 66 states have internal predecessors, (68), 18 states have call successors, (18), 14 states have call predecessors, (18), 16 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-23 22:34:49,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2023-11-23 22:34:49,077 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 54 [2023-11-23 22:34:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:49,078 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2023-11-23 22:34:49,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-23 22:34:49,078 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2023-11-23 22:34:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-23 22:34:49,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:49,080 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:49,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:49,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:49,290 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:49,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1709019117, now seen corresponding path program 1 times [2023-11-23 22:34:49,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:49,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549237556] [2023-11-23 22:34:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:49,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:49,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:49,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564384735] [2023-11-23 22:34:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:49,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:49,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:49,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:49,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:34:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:49,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-23 22:34:49,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:49,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 22:34:49,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 22:34:50,281 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 41 treesize of output 21 [2023-11-23 22:34:50,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2023-11-23 22:34:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 22:34:50,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:53,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:53,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549237556] [2023-11-23 22:34:53,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:53,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564384735] [2023-11-23 22:34:53,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564384735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:53,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:34:53,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-23 22:34:53,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366897285] [2023-11-23 22:34:53,739 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:53,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:34:53,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:34:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=254, Unknown=1, NotChecked=0, Total=306 [2023-11-23 22:34:53,741 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 22:34:55,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:55,368 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2023-11-23 22:34:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 22:34:55,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 60 [2023-11-23 22:34:55,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:55,370 INFO L225 Difference]: With dead ends: 109 [2023-11-23 22:34:55,370 INFO L226 Difference]: Without dead ends: 105 [2023-11-23 22:34:55,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=150, Invalid=719, Unknown=1, NotChecked=0, Total=870 [2023-11-23 22:34:55,372 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:55,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 46 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 252 Invalid, 2 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 22:34:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-23 22:34:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-23 22:34:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 18 states have call successors, (18), 16 states have call predecessors, (18), 17 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-23 22:34:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2023-11-23 22:34:55,398 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 60 [2023-11-23 22:34:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:55,399 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2023-11-23 22:34:55,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 22:34:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2023-11-23 22:34:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 22:34:55,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:55,400 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-23 22:34:55,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:55,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 22:34:55,614 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:55,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:55,614 INFO L85 PathProgramCache]: Analyzing trace with hash 671256361, now seen corresponding path program 3 times [2023-11-23 22:34:55,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:55,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693211075] [2023-11-23 22:34:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:55,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:55,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:55,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875701207] [2023-11-23 22:34:55,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:34:55,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:55,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:55,669 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:55,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:34:55,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 22:34:55,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:34:55,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 131 conjunts are in the unsatisfiable core [2023-11-23 22:34:55,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:55,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:55,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:34:55,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:34:56,536 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 25 treesize of output 17 [2023-11-23 22:34:56,547 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 [2023-11-23 22:34:56,564 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 [2023-11-23 22:34:56,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-23 22:34:57,214 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 [2023-11-23 22:34:57,229 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 [2023-11-23 22:34:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 22:34:57,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-11-23 22:34:58,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:58,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693211075] [2023-11-23 22:34:58,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:58,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875701207] [2023-11-23 22:34:58,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875701207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:34:58,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:58,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 20 [2023-11-23 22:34:58,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340942285] [2023-11-23 22:34:58,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:58,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 22:34:58,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:58,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 22:34:58,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-11-23 22:34:58,412 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 20 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 9 states have call successors, (18), 9 states have call predecessors, (18), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 22:35:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:00,883 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2023-11-23 22:35:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-23 22:35:00,884 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 9 states have call successors, (18), 9 states have call predecessors, (18), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 64 [2023-11-23 22:35:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:00,886 INFO L225 Difference]: With dead ends: 157 [2023-11-23 22:35:00,886 INFO L226 Difference]: Without dead ends: 155 [2023-11-23 22:35:00,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 93 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 22:35:00,888 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 104 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:00,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 294 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 22:35:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-23 22:35:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 137. [2023-11-23 22:35:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 92 states have internal predecessors, (94), 22 states have call successors, (22), 21 states have call predecessors, (22), 24 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) [2023-11-23 22:35:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2023-11-23 22:35:00,935 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 64 [2023-11-23 22:35:00,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:00,935 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2023-11-23 22:35:00,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 9 states have call successors, (18), 9 states have call predecessors, (18), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 22:35:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2023-11-23 22:35:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 22:35:00,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:00,937 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:00,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:01,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:01,140 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:01,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash 308638302, now seen corresponding path program 1 times [2023-11-23 22:35:01,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:01,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261180887] [2023-11-23 22:35:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:01,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:01,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635035177] [2023-11-23 22:35:01,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:01,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:01,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:01,158 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:01,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:35:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:01,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-23 22:35:01,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:01,325 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 [2023-11-23 22:35:01,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:35:02,046 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 38 treesize of output 30 [2023-11-23 22:35:02,304 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 [2023-11-23 22:35:02,314 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 [2023-11-23 22:35:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 39 proven. 80 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 22:35:03,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:05,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2023-11-23 22:35:06,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2023-11-23 22:35:06,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-11-23 22:35:07,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261180887] [2023-11-23 22:35:07,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635035177] [2023-11-23 22:35:07,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635035177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:07,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:35:07,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-23 22:35:07,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277850643] [2023-11-23 22:35:07,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:07,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 22:35:07,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 22:35:07,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=768, Unknown=1, NotChecked=0, Total=870 [2023-11-23 22:35:07,288 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand has 22 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-23 22:35:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:09,983 INFO L93 Difference]: Finished difference Result 139 states and 145 transitions. [2023-11-23 22:35:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 22:35:09,984 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 66 [2023-11-23 22:35:09,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:09,986 INFO L225 Difference]: With dead ends: 139 [2023-11-23 22:35:09,986 INFO L226 Difference]: Without dead ends: 117 [2023-11-23 22:35:09,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=354, Invalid=2195, Unknown=1, NotChecked=0, Total=2550 [2023-11-23 22:35:09,991 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 30 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:09,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 69 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 462 Invalid, 9 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 22:35:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-23 22:35:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-11-23 22:35:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 79 states have internal predecessors, (80), 19 states have call successors, (19), 18 states have call predecessors, (19), 20 states have return successors, (24), 19 states have call predecessors, (24), 18 states have call successors, (24) [2023-11-23 22:35:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2023-11-23 22:35:10,034 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 66 [2023-11-23 22:35:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:10,034 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2023-11-23 22:35:10,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-23 22:35:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2023-11-23 22:35:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-23 22:35:10,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:10,036 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:10,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:10,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:35:10,237 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:10,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:10,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1776636980, now seen corresponding path program 2 times [2023-11-23 22:35:10,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:10,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784424868] [2023-11-23 22:35:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:10,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:10,256 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:10,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179308465] [2023-11-23 22:35:10,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:35:10,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:10,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:10,257 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:10,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5146e26-dc32-4284-a1ab-409938d52d64/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 22:35:10,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:35:10,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:35:10,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-23 22:35:10,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:10,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:35:10,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-23 22:35:12,955 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_29_to_40_0_#in~t.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_23| Int) (|v_func_to_recursive_line_29_to_40_0_#in~t.offset_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_23| Int)) (<= (select (select |c_#memory_int#1| |v_func_to_recursive_line_29_to_40_0_#in~t.base_BEFORE_CALL_10|) |v_func_to_recursive_line_29_to_40_0_#in~t.offset_BEFORE_CALL_10|) (+ (* 2 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_23|) |v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_23|)) 1))) is different from true