./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/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_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/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_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/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 e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:45:56,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:45:57,058 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:45:57,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:45:57,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:45:57,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:45:57,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:45:57,108 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:45:57,109 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:45:57,114 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:45:57,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:45:57,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:45:57,116 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:45:57,118 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:45:57,118 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:45:57,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:45:57,119 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:45:57,120 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:45:57,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:45:57,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:45:57,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:45:57,122 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:45:57,122 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:45:57,123 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:45:57,123 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:45:57,124 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:45:57,124 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:45:57,125 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:45:57,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:45:57,126 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:45:57,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:45:57,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:45:57,128 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:45:57,128 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:45:57,129 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:45:57,129 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:45:57,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:45:57,129 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:45:57,130 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:45:57,130 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:45:57,130 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:45:57,131 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:45:57,131 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_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 [2023-11-24 21:45:57,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:45:57,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:45:57,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:45:57,529 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:45:57,529 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:45:57,531 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2023-11-24 21:46:00,680 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:46:00,926 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:46:00,929 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2023-11-24 21:46:00,941 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/data/67a64aa9a/b07c8a2d0e6d4a5a91929653229b11ae/FLAGb30f87389 [2023-11-24 21:46:00,958 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/data/67a64aa9a/b07c8a2d0e6d4a5a91929653229b11ae [2023-11-24 21:46:00,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:46:00,966 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:46:00,970 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:46:00,970 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:46:00,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:46:00,977 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:46:00" (1/1) ... [2023-11-24 21:46:00,978 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@546d5f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:00, skipping insertion in model container [2023-11-24 21:46:00,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:46:00" (1/1) ... [2023-11-24 21:46:01,019 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:46:01,234 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_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c[1106,1119] [2023-11-24 21:46:01,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:46:01,286 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:46:01,312 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_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c[1106,1119] [2023-11-24 21:46:01,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:46:01,350 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:46:01,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01 WrapperNode [2023-11-24 21:46:01,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:46:01,352 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:46:01,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:46:01,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:46:01,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,372 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,395 INFO L138 Inliner]: procedures = 18, calls = 104, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 95 [2023-11-24 21:46:01,396 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:46:01,397 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:46:01,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:46:01,397 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:46:01,409 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,410 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,414 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,440 INFO L175 MemorySlicer]: Split 66 memory accesses to 8 slices as follows [9, 2, 7, 8, 11, 13, 8, 8]. 20 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [0, 2, 7, 0, 0, 0, 0, 0]. The 10 writes are split as follows [1, 0, 0, 1, 2, 2, 2, 2]. [2023-11-24 21:46:01,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,466 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,469 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,471 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,477 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:46:01,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:46:01,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:46:01,487 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:46:01,488 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (1/1) ... [2023-11-24 21:46:01,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:46:01,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:01,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:46:01,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:46:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:46:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_38_0 [2023-11-24 21:46:01,581 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_38_0 [2023-11-24 21:46:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_48_to_53_0 [2023-11-24 21:46:01,581 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_48_to_53_0 [2023-11-24 21:46:01,582 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 21:46:01,582 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 21:46:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:46:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:46:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:46:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:46:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:46:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:46:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-24 21:46:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-24 21:46:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_45_0 [2023-11-24 21:46:01,587 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_45_0 [2023-11-24 21:46:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:46:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:46:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:46:01,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:46:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:46:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:46:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:46:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-24 21:46:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-24 21:46:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:46:01,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:46:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:46:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:46:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:46:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:46:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:46:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:46:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-24 21:46:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-24 21:46:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 21:46:01,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 21:46:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:46:01,777 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:46:01,779 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:46:02,190 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:46:02,225 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:46:02,225 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:46:02,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:46:02 BoogieIcfgContainer [2023-11-24 21:46:02,226 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:46:02,229 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:46:02,229 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:46:02,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:46:02,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:46:00" (1/3) ... [2023-11-24 21:46:02,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b670483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:46:02, skipping insertion in model container [2023-11-24 21:46:02,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:01" (2/3) ... [2023-11-24 21:46:02,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b670483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:46:02, skipping insertion in model container [2023-11-24 21:46:02,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:46:02" (3/3) ... [2023-11-24 21:46:02,236 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm1.c [2023-11-24 21:46:02,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:46:02,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:46:02,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:46:02,317 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;@28c159ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:46:02,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:46:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 30 states have (on average 1.3) internal successors, (39), 34 states have internal predecessors, (39), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-24 21:46:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:46:02,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:02,332 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:02,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:02,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:02,341 INFO L85 PathProgramCache]: Analyzing trace with hash -808037571, now seen corresponding path program 1 times [2023-11-24 21:46:02,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:02,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813444479] [2023-11-24 21:46:02,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:02,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:02,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:02,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813444479] [2023-11-24 21:46:02,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-24 21:46:02,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673616496] [2023-11-24 21:46:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:02,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:02,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:02,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:46:02,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:46:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:02,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 21:46:02,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 21:46:02,894 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:46:02,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673616496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:02,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:02,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:46:02,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032655710] [2023-11-24 21:46:02,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:02,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:46:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:02,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:46:02,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:46:02,947 INFO L87 Difference]: Start difference. First operand has 52 states, 30 states have (on average 1.3) internal successors, (39), 34 states have internal predecessors, (39), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:46:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:03,006 INFO L93 Difference]: Finished difference Result 102 states and 150 transitions. [2023-11-24 21:46:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:46:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-24 21:46:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:03,020 INFO L225 Difference]: With dead ends: 102 [2023-11-24 21:46:03,021 INFO L226 Difference]: Without dead ends: 50 [2023-11-24 21:46:03,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 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 21:46:03,031 INFO L413 NwaCegarLoop]: 62 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, 62 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 21:46:03,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:46:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-24 21:46:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-24 21:46:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 33 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-24 21:46:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2023-11-24 21:46:03,094 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 32 [2023-11-24 21:46:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:03,095 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2023-11-24 21:46:03,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:46:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2023-11-24 21:46:03,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:46:03,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:03,100 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:03,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:46:03,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 21:46:03,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:03,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:03,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2114555835, now seen corresponding path program 1 times [2023-11-24 21:46:03,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:03,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93021797] [2023-11-24 21:46:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:03,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:03,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:46:03,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136825323] [2023-11-24 21:46:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:03,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:03,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:03,385 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:46:03,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:46:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:03,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 91 conjunts are in the unsatisfiable core [2023-11-24 21:46:03,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:03,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:46:03,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:46:04,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:46:04,146 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 15 treesize of output 11 [2023-11-24 21:46:04,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:46:04,491 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 21:46:04,498 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 21:46:04,508 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 21:46:04,514 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 21:46:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-24 21:46:04,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:46:04,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:04,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93021797] [2023-11-24 21:46:04,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:46:04,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136825323] [2023-11-24 21:46:04,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136825323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:04,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:04,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 21:46:04,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936977932] [2023-11-24 21:46:04,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:04,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:46:04,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:04,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:46:04,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:46:04,621 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-24 21:46:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:05,265 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2023-11-24 21:46:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:46:05,266 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-11-24 21:46:05,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:05,272 INFO L225 Difference]: With dead ends: 68 [2023-11-24 21:46:05,273 INFO L226 Difference]: Without dead ends: 66 [2023-11-24 21:46:05,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:46:05,280 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 24 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:05,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 345 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:46:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-24 21:46:05,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2023-11-24 21:46:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.135135135135135) internal successors, (42), 41 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-11-24 21:46:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-11-24 21:46:05,305 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 32 [2023-11-24 21:46:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:05,305 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-11-24 21:46:05,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-24 21:46:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-11-24 21:46:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-24 21:46:05,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:05,308 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:05,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:46:05,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:05,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:05,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1045356432, now seen corresponding path program 1 times [2023-11-24 21:46:05,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:05,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973763806] [2023-11-24 21:46:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:05,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:05,570 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:46:05,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819495354] [2023-11-24 21:46:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:05,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:05,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:05,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:46:05,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:46:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:05,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 141 conjunts are in the unsatisfiable core [2023-11-24 21:46:05,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:05,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:46:05,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:46:06,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:46:06,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:46:06,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:46:10,967 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 21:46:10,971 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 21:46:10,978 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 21:46:10,983 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 21:46:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-24 21:46:23,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:46:54,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973763806] [2023-11-24 21:46:54,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:46:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819495354] [2023-11-24 21:46:54,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819495354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:46:54,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:46:54,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-24 21:46:54,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911591013] [2023-11-24 21:46:54,994 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 21:46:54,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:46:54,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:46:54,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=389, Unknown=11, NotChecked=0, Total=462 [2023-11-24 21:46:54,996 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:47:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:00,459 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2023-11-24 21:47:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:47:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-11-24 21:47:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:00,464 INFO L225 Difference]: With dead ends: 114 [2023-11-24 21:47:00,464 INFO L226 Difference]: Without dead ends: 112 [2023-11-24 21:47:00,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 52.8s TimeCoverageRelationStatistics Valid=124, Invalid=734, Unknown=12, NotChecked=0, Total=870 [2023-11-24 21:47:00,466 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 62 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:00,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 373 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:47:00,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-24 21:47:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2023-11-24 21:47:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 71 states have internal predecessors, (75), 26 states have call successors, (26), 13 states have call predecessors, (26), 13 states have return successors, (30), 24 states have call predecessors, (30), 24 states have call successors, (30) [2023-11-24 21:47:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2023-11-24 21:47:00,547 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 42 [2023-11-24 21:47:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:00,548 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2023-11-24 21:47:00,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:47:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2023-11-24 21:47:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-24 21:47:00,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:00,555 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:00,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:00,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:00,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:00,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2118463180, now seen corresponding path program 1 times [2023-11-24 21:47:00,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:00,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758918892] [2023-11-24 21:47:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:00,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:00,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:47:00,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232092801] [2023-11-24 21:47:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:00,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:00,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:00,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:00,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a7b10e1-6dc8-42f8-85f5-440fe00e1d50/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process