./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:28:11,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:28:11,547 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:28:11,553 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:28:11,553 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:28:11,581 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:28:11,582 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:28:11,582 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:28:11,583 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:28:11,584 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:28:11,584 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:28:11,585 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:28:11,586 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:28:11,586 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:28:11,587 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:28:11,588 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:28:11,588 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:28:11,589 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:28:11,589 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:28:11,592 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:28:11,592 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:28:11,593 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:28:11,593 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:28:11,594 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:28:11,594 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:28:11,595 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:28:11,595 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:28:11,596 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:28:11,596 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:28:11,597 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:28:11,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:28:11,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:28:11,598 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:28:11,599 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:28:11,599 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:28:11,600 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:28:11,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:28:11,600 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:28:11,601 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:28:11,601 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:28:11,601 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:28:11,602 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:28:11,602 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_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae [2023-11-24 21:28:11,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:28:11,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:28:11,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:28:11,940 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:28:11,940 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:28:11,941 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2023-11-24 21:28:15,146 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:28:15,358 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:28:15,358 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2023-11-24 21:28:15,368 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/data/f5ea87834/ef34467f4d6348c2aa08e3f10a4dc3fd/FLAG9a1e5f05e [2023-11-24 21:28:15,384 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/data/f5ea87834/ef34467f4d6348c2aa08e3f10a4dc3fd [2023-11-24 21:28:15,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:28:15,390 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:28:15,391 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:28:15,392 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:28:15,398 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:28:15,399 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15, skipping insertion in model container [2023-11-24 21:28:15,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,427 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:28:15,622 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_40986810-707d-4048-bdfa-a7fcabc7a066/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2023-11-24 21:28:15,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:28:15,670 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:28:15,692 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_40986810-707d-4048-bdfa-a7fcabc7a066/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2023-11-24 21:28:15,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:28:15,736 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:28:15,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15 WrapperNode [2023-11-24 21:28:15,737 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:28:15,738 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:28:15,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:28:15,738 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:28:15,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,756 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,777 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-11-24 21:28:15,778 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:28:15,779 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:28:15,779 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:28:15,779 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:28:15,790 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,794 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,815 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 8, 10, 8, 6, 10, 5]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 3, 2, 3, 2, 1, 1]. [2023-11-24 21:28:15,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,825 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,828 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,830 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,832 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,837 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:28:15,838 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:28:15,838 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:28:15,838 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:28:15,839 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (1/1) ... [2023-11-24 21:28:15,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:28:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:15,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:28:15,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:28:15,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:28:15,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:28:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:28:15,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:28:15,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:28:15,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:28:15,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:28:15,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-24 21:28:15,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:28:15,932 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2023-11-24 21:28:15,932 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2023-11-24 21:28:15,933 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2023-11-24 21:28:15,933 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2023-11-24 21:28:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:28:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:28:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:28:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:28:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:28:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:28:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-24 21:28:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:28:15,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:28:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:28:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:28:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:28:15,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:28:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:28:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:28:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-24 21:28:15,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 21:28:15,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 21:28:15,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:28:16,112 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:28:16,115 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:28:16,464 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:28:16,516 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:28:16,516 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:28:16,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:28:16 BoogieIcfgContainer [2023-11-24 21:28:16,517 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:28:16,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:28:16,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:28:16,525 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:28:16,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:28:15" (1/3) ... [2023-11-24 21:28:16,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5ec773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:28:16, skipping insertion in model container [2023-11-24 21:28:16,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:15" (2/3) ... [2023-11-24 21:28:16,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5ec773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:28:16, skipping insertion in model container [2023-11-24 21:28:16,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:28:16" (3/3) ... [2023-11-24 21:28:16,529 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2023-11-24 21:28:16,586 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:28:16,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:28:16,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:28:16,675 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;@4b342e4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:28:16,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:28:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:28:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:28:16,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:16,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:16,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:16,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:16,705 INFO L85 PathProgramCache]: Analyzing trace with hash 779716243, now seen corresponding path program 1 times [2023-11-24 21:28:16,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:16,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844884873] [2023-11-24 21:28:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:16,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:16,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:16,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844884873] [2023-11-24 21:28:16,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-24 21:28:16,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961364354] [2023-11-24 21:28:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:16,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:16,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:16,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:16,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:28:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 21:28:17,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:17,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:28:17,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961364354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:17,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:17,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:28:17,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988900394] [2023-11-24 21:28:17,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:17,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:28:17,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:28:17,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:28:17,261 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:17,337 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2023-11-24 21:28:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:28:17,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-24 21:28:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:17,351 INFO L225 Difference]: With dead ends: 78 [2023-11-24 21:28:17,351 INFO L226 Difference]: Without dead ends: 38 [2023-11-24 21:28:17,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:28:17,363 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:17,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:28:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-24 21:28:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-24 21:28:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 26 states have internal predecessors, (26), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-24 21:28:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-11-24 21:28:17,436 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2023-11-24 21:28:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:17,437 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-11-24 21:28:17,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-11-24 21:28:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:28:17,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:17,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:17,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:17,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:17,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:17,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1459774613, now seen corresponding path program 1 times [2023-11-24 21:28:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:17,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053568588] [2023-11-24 21:28:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:17,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:17,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:28:17,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111387209] [2023-11-24 21:28:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:17,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:17,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:17,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:17,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:28:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-24 21:28:17,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:18,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:28:18,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-24 21:28:18,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-24 21:28:18,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:28:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:18,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:28:18,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:18,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053568588] [2023-11-24 21:28:18,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:28:18,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111387209] [2023-11-24 21:28:18,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111387209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:18,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:18,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:28:18,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487328408] [2023-11-24 21:28:18,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:18,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:28:18,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:18,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:28:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:28:18,496 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 10 states, 8 states have (on average 1.0) internal successors, (8), 7 states have internal predecessors, (8), 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) [2023-11-24 21:28:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:18,952 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2023-11-24 21:28:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:28:18,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.0) internal successors, (8), 7 states have internal predecessors, (8), 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 10 [2023-11-24 21:28:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:18,955 INFO L225 Difference]: With dead ends: 55 [2023-11-24 21:28:18,955 INFO L226 Difference]: Without dead ends: 53 [2023-11-24 21:28:18,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:28:18,957 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:18,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 254 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:28:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-24 21:28:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-11-24 21:28:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-24 21:28:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-11-24 21:28:18,974 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 10 [2023-11-24 21:28:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:18,974 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-11-24 21:28:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.0) internal successors, (8), 7 states have internal predecessors, (8), 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) [2023-11-24 21:28:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-11-24 21:28:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:28:18,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:18,975 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:18,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:19,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:19,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:19,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash -860720822, now seen corresponding path program 1 times [2023-11-24 21:28:19,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:19,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093628768] [2023-11-24 21:28:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:19,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:19,252 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:28:19,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653508321] [2023-11-24 21:28:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:19,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:19,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:19,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:19,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:28:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:19,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-24 21:28:19,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:19,462 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 15 treesize of output 1 [2023-11-24 21:28:19,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:28:19,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-24 21:28:19,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:28:20,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:28:20,120 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 [2023-11-24 21:28:20,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:28:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:20,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:22,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093628768] [2023-11-24 21:28:22,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:28:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653508321] [2023-11-24 21:28:22,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653508321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:22,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:28:22,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-24 21:28:22,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869343117] [2023-11-24 21:28:22,270 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 21:28:22,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:28:22,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:28:22,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=229, Unknown=1, NotChecked=0, Total=272 [2023-11-24 21:28:22,273 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 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) [2023-11-24 21:28:23,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:23,108 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-11-24 21:28:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:28:23,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 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 16 [2023-11-24 21:28:23,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:23,111 INFO L225 Difference]: With dead ends: 81 [2023-11-24 21:28:23,111 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 21:28:23,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=85, Invalid=420, Unknown=1, NotChecked=0, Total=506 [2023-11-24 21:28:23,113 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:23,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 186 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:28:23,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 21:28:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2023-11-24 21:28:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 47 states have (on average 1.127659574468085) internal successors, (53), 52 states have internal predecessors, (53), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-24 21:28:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2023-11-24 21:28:23,146 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 16 [2023-11-24 21:28:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:23,147 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2023-11-24 21:28:23,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 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) [2023-11-24 21:28:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2023-11-24 21:28:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 21:28:23,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:23,149 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:23,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:23,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:23,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:23,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1771378809, now seen corresponding path program 1 times [2023-11-24 21:28:23,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:23,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868347574] [2023-11-24 21:28:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:23,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:23,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:28:23,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179263975] [2023-11-24 21:28:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:23,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:23,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:23,405 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:23,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:28:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:23,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-24 21:28:23,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:23,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:28:23,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-11-24 21:28:23,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:28:23,953 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 [2023-11-24 21:28:23,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-24 21:28:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:28:24,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:28:24,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868347574] [2023-11-24 21:28:24,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:28:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179263975] [2023-11-24 21:28:24,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179263975] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:24,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:28:24,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2023-11-24 21:28:24,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336218957] [2023-11-24 21:28:24,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:24,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:28:24,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:24,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:28:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:28:24,211 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:28:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:24,611 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2023-11-24 21:28:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:28:24,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-11-24 21:28:24,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:24,615 INFO L225 Difference]: With dead ends: 96 [2023-11-24 21:28:24,615 INFO L226 Difference]: Without dead ends: 94 [2023-11-24 21:28:24,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:28:24,621 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:24,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 189 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:28:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-24 21:28:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2023-11-24 21:28:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 58 states have internal predecessors, (59), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-24 21:28:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2023-11-24 21:28:24,661 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 26 [2023-11-24 21:28:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:24,661 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2023-11-24 21:28:24,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:28:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2023-11-24 21:28:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 21:28:24,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:24,664 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:24,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:24,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:24,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:24,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:24,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1321931825, now seen corresponding path program 1 times [2023-11-24 21:28:24,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:24,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880965737] [2023-11-24 21:28:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:24,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:24,918 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:28:24,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310890667] [2023-11-24 21:28:24,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:24,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:24,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:24,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:24,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:28:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 21:28:25,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:25,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:28:25,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:28:25,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:28:25,362 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 [2023-11-24 21:28:25,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:28:25,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:28:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:28:25,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880965737] [2023-11-24 21:28:25,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:28:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310890667] [2023-11-24 21:28:25,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310890667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:25,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:28:25,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-24 21:28:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101334375] [2023-11-24 21:28:25,597 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 21:28:25,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:28:25,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:28:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:28:25,599 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:28:29,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 21:28:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:30,371 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2023-11-24 21:28:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:28:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-24 21:28:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:30,373 INFO L225 Difference]: With dead ends: 92 [2023-11-24 21:28:30,374 INFO L226 Difference]: Without dead ends: 82 [2023-11-24 21:28:30,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-24 21:28:30,375 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:30,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 59 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 373 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2023-11-24 21:28:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-24 21:28:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-24 21:28:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 56 states have internal predecessors, (57), 19 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-24 21:28:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2023-11-24 21:28:30,399 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 26 [2023-11-24 21:28:30,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:30,400 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2023-11-24 21:28:30,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:28:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2023-11-24 21:28:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:28:30,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:30,401 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, 1, 1] [2023-11-24 21:28:30,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:30,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:30,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:30,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:30,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1358287025, now seen corresponding path program 1 times [2023-11-24 21:28:30,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:30,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98212608] [2023-11-24 21:28:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:30,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:30,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:28:30,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917686649] [2023-11-24 21:28:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:30,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:30,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:30,636 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:30,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:28:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:30,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-24 21:28:30,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:30,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:28:30,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:28:30,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:28:30,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:28:31,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:28:31,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:28:31,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:28:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:28:31,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:32,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:32,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98212608] [2023-11-24 21:28:32,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:28:32,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917686649] [2023-11-24 21:28:32,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917686649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:32,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:28:32,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-24 21:28:32,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704095010] [2023-11-24 21:28:32,192 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 21:28:32,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:28:32,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:28:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:28:32,195 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:28:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:33,376 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2023-11-24 21:28:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:28:33,377 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-11-24 21:28:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:33,378 INFO L225 Difference]: With dead ends: 91 [2023-11-24 21:28:33,378 INFO L226 Difference]: Without dead ends: 89 [2023-11-24 21:28:33,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2023-11-24 21:28:33,380 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:33,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 191 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:28:33,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-24 21:28:33,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2023-11-24 21:28:33,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 59 states have internal predecessors, (60), 19 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-24 21:28:33,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2023-11-24 21:28:33,404 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 32 [2023-11-24 21:28:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:33,404 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2023-11-24 21:28:33,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:28:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2023-11-24 21:28:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-24 21:28:33,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:33,406 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, 1, 1] [2023-11-24 21:28:33,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:33,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:33,613 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:33,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1087391719, now seen corresponding path program 1 times [2023-11-24 21:28:33,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:33,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550196184] [2023-11-24 21:28:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:33,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:33,644 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:28:33,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939351880] [2023-11-24 21:28:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:33,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:33,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:33,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:33,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:28:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:33,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-24 21:28:33,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:33,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:28:33,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:28:33,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:28:34,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:28:34,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:28:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 21:28:34,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:34,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-24 21:28:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-24 21:28:34,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:34,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550196184] [2023-11-24 21:28:34,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:28:34,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939351880] [2023-11-24 21:28:34,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939351880] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:34,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:28:34,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 27 [2023-11-24 21:28:34,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289954050] [2023-11-24 21:28:34,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:34,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:28:34,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:34,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:28:34,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2023-11-24 21:28:34,725 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:28:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:35,312 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2023-11-24 21:28:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:28:35,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-24 21:28:35,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:35,319 INFO L225 Difference]: With dead ends: 93 [2023-11-24 21:28:35,319 INFO L226 Difference]: Without dead ends: 91 [2023-11-24 21:28:35,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2023-11-24 21:28:35,328 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:35,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 233 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:28:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-24 21:28:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2023-11-24 21:28:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 62 states have internal predecessors, (63), 19 states have call successors, (19), 12 states have call predecessors, (19), 12 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-24 21:28:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2023-11-24 21:28:35,351 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 38 [2023-11-24 21:28:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:35,352 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2023-11-24 21:28:35,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:28:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2023-11-24 21:28:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-24 21:28:35,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:35,354 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, 1, 1, 1] [2023-11-24 21:28:35,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:35,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:35,560 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:35,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1075242647, now seen corresponding path program 1 times [2023-11-24 21:28:35,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:35,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147090666] [2023-11-24 21:28:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:35,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:35,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:28:35,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335541030] [2023-11-24 21:28:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:35,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:35,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:35,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:35,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40986810-707d-4048-bdfa-a7fcabc7a066/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:28:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:35,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-24 21:28:35,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:35,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:28:39,950 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_2 Int) (v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_2 Int) (v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_3 Int) (v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_2 Int) (v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_2 Int)) (<= (* (select (select |c_#memory_int#3| v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_2) v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_2) (select (select |c_#memory_int#5| v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_3) 0)) (select (select |c_#memory_int#1| v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_2) v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_2))) is different from true [2023-11-24 21:28:44,040 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_3 Int) (v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_3 Int) (v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_4 Int) (v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_3 Int) (v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_3 Int)) (<= (* (select (select |c_#memory_int#3| v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_3) v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_3) (select (select |c_#memory_int#5| v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_4) 0)) (select (select |c_#memory_int#1| v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_3) v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_3))) is different from true [2023-11-24 21:28:52,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-24 21:28:52,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-24 21:28:52,260 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 [2023-11-24 21:28:52,264 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 [2023-11-24 21:28:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 10 not checked. [2023-11-24 21:28:56,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:56,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-11-24 21:28:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-24 21:28:56,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:56,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147090666] [2023-11-24 21:28:56,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:28:56,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335541030] [2023-11-24 21:28:56,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335541030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:28:56,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:28:56,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 25 [2023-11-24 21:28:56,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172972858] [2023-11-24 21:28:56,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:28:56,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 21:28:56,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 21:28:56,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=441, Unknown=5, NotChecked=86, Total=600 [2023-11-24 21:28:56,771 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 8 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-24 21:29:01,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 21:29:05,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 21:29:13,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]