./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-u.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_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/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_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/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_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/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 d2226df89556021067dd01a2668200dd1f99aac7ec2d26741f3688f0af887e5c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:51:51,492 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:51:51,626 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:51:51,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:51:51,636 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:51:51,678 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:51:51,679 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:51:51,680 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:51:51,681 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:51:51,686 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:51:51,687 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:51:51,687 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:51:51,688 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:51:51,690 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:51:51,690 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:51:51,691 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:51:51,691 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:51:51,692 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:51:51,692 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:51:51,693 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:51:51,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:51:51,694 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:51:51,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:51:51,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:51:51,695 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:51:51,696 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:51:51,696 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:51:51,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:51:51,698 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:51:51,698 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:51:51,700 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:51:51,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:51:51,701 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:51:51,701 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:51:51,701 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:51:51,702 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:51:51,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:51:51,702 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:51:51,702 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:51:51,703 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:51:51,703 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:51:51,704 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:51:51,704 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_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2226df89556021067dd01a2668200dd1f99aac7ec2d26741f3688f0af887e5c [2023-11-24 21:51:52,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:51:52,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:51:52,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:51:52,040 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:51:52,041 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:51:52,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-u.c [2023-11-24 21:51:55,163 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:51:55,412 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:51:55,413 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-u.c [2023-11-24 21:51:55,425 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/data/64af41a9e/20ae310f2e714e92a8cdf46d2146d2ef/FLAG2e735cdd3 [2023-11-24 21:51:55,442 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/data/64af41a9e/20ae310f2e714e92a8cdf46d2146d2ef [2023-11-24 21:51:55,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:51:55,451 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:51:55,455 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:51:55,455 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:51:55,461 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:51:55,462 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73525c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55, skipping insertion in model container [2023-11-24 21:51:55,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,494 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:51:55,700 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_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-u.c[1083,1096] [2023-11-24 21:51:55,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:51:55,744 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:51:55,762 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_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-u.c[1083,1096] [2023-11-24 21:51:55,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:51:55,808 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:51:55,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55 WrapperNode [2023-11-24 21:51:55,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:51:55,811 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:51:55,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:51:55,812 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:51:55,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,862 INFO L138 Inliner]: procedures = 16, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 58 [2023-11-24 21:51:55,863 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:51:55,863 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:51:55,864 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:51:55,864 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:51:55,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,894 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,913 INFO L175 MemorySlicer]: Split 27 memory accesses to 6 slices as follows [8, 2, 6, 5, 4, 2]. 30 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0, 0, 0]. The 9 writes are split as follows [3, 0, 1, 2, 2, 1]. [2023-11-24 21:51:55,913 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,913 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,920 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,923 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,924 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,926 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,929 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:51:55,931 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:51:55,931 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:51:55,931 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:51:55,932 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (1/1) ... [2023-11-24 21:51:55,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:51:55,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:55,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:51:55,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:51:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_28_to_36_0 [2023-11-24 21:51:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_28_to_36_0 [2023-11-24 21:51:56,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:51:56,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:51:56,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:51:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:51:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:51:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:51:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:51:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:51:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:51:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:51:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:51:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:51:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:51:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:51:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:51:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:51:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:51:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:51:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:51:56,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:51:56,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:51:56,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:51:56,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 21:51:56,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 21:51:56,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:51:56,114 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:51:56,117 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:51:56,332 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:51:56,368 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:51:56,369 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:51:56,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:51:56 BoogieIcfgContainer [2023-11-24 21:51:56,370 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:51:56,373 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:51:56,373 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:51:56,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:51:56,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:51:55" (1/3) ... [2023-11-24 21:51:56,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c5e2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:51:56, skipping insertion in model container [2023-11-24 21:51:56,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:55" (2/3) ... [2023-11-24 21:51:56,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c5e2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:51:56, skipping insertion in model container [2023-11-24 21:51:56,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:51:56" (3/3) ... [2023-11-24 21:51:56,381 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_geo1-u.c [2023-11-24 21:51:56,403 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:51:56,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:51:56,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:51:56,461 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;@54f7e914, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:51:56,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:51:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 21:51:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:51:56,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:56,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:56,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:51:56,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1288934217, now seen corresponding path program 1 times [2023-11-24 21:51:56,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:56,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441739725] [2023-11-24 21:51:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:56,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:56,775 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:51:56,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924948063] [2023-11-24 21:51:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:56,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:56,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:56,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:56,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:51:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:56,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-24 21:51:57,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:57,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:51:57,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-24 21:51:57,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:51:57,495 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 21:51:57,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 21:51:57,563 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 21:51:57,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:51:57,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:57,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441739725] [2023-11-24 21:51:57,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:51:57,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924948063] [2023-11-24 21:51:57,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924948063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:57,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:57,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:51:57,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576461582] [2023-11-24 21:51:57,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:57,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:51:57,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:57,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:51:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:51:57,615 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:58,023 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-11-24 21:51:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:51:58,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:51:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:58,033 INFO L225 Difference]: With dead ends: 50 [2023-11-24 21:51:58,033 INFO L226 Difference]: Without dead ends: 30 [2023-11-24 21:51:58,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:51:58,041 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:58,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:51:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-24 21:51:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-11-24 21:51:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-24 21:51:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-24 21:51:58,086 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 8 [2023-11-24 21:51:58,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:58,087 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-24 21:51:58,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-24 21:51:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:51:58,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:58,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:58,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:58,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 21:51:58,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:51:58,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:58,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1531368910, now seen corresponding path program 1 times [2023-11-24 21:51:58,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:58,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204642564] [2023-11-24 21:51:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:58,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:58,375 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:51:58,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619297958] [2023-11-24 21:51:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:58,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:58,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:58,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:58,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93de14c5-58c4-4a07-88f9-dfa2a257e7e9/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:51:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:59,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 107 conjunts are in the unsatisfiable core [2023-11-24 21:51:59,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:59,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:51:59,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 21:51:59,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-24 21:52:00,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2023-11-24 21:52:00,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-24 21:52:00,398 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 44 treesize of output 28 [2023-11-24 21:52:00,406 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 21:52:00,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-24 21:52:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:00,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:52:26,992 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int#3| c_func_to_recursive_line_28_to_36_0_~y.base) c_func_to_recursive_line_28_to_36_0_~y.offset)) (.cse0 (select (select |c_#memory_int#0| c_func_to_recursive_line_28_to_36_0_~x.base) c_func_to_recursive_line_28_to_36_0_~x.offset)) (.cse1 (mod (select (select |c_#memory_int#2| c_func_to_recursive_line_28_to_36_0_~z.base) c_func_to_recursive_line_28_to_36_0_~z.offset) 4294967296))) (or (= (mod (+ (* .cse0 .cse1 .cse1) (* .cse2 18446744073709551615 .cse1) .cse1 (* 18446744073709551615 .cse0 .cse1)) 18446744073709551616) 0) (not (= (mod (+ (* 18446744073709551615 .cse0) (* .cse2 18446744073709551615) (* .cse0 .cse1) 1) 18446744073709551616) 0)))) is different from true [2023-11-24 21:52:39,156 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int#3| |c_func_to_recursive_line_28_to_36_0_#in~y.base|) |c_func_to_recursive_line_28_to_36_0_#in~y.offset|)) (.cse0 (mod (select (select |c_#memory_int#2| |c_func_to_recursive_line_28_to_36_0_#in~z.base|) |c_func_to_recursive_line_28_to_36_0_#in~z.offset|) 4294967296)) (.cse1 (select (select |c_#memory_int#0| |c_func_to_recursive_line_28_to_36_0_#in~x.base|) |c_func_to_recursive_line_28_to_36_0_#in~x.offset|))) (or (= (mod (+ .cse0 (* 18446744073709551615 .cse0 .cse1) (* 18446744073709551615 .cse0 .cse2) (* .cse0 .cse0 .cse1)) 18446744073709551616) 0) (not (= (mod (+ (* 18446744073709551615 .cse2) (* .cse0 .cse1) (* 18446744073709551615 .cse1) 1) 18446744073709551616) 0)))) is different from true [2023-11-24 21:52:51,882 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int#0| |c_ULTIMATE.start_main_~#x~0#1.base|) |c_ULTIMATE.start_main_~#x~0#1.offset|)) (.cse0 (select (select |c_#memory_int#3| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|)) (.cse2 (mod (select (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#z~0#1.base|) |c_ULTIMATE.start_main_~#z~0#1.offset|) 4294967296))) (or (not (= (mod (+ (* 18446744073709551615 .cse0) (* 18446744073709551615 .cse1) (* .cse1 .cse2) 1) 18446744073709551616) 0)) (= (mod (+ (* 18446744073709551615 .cse1 .cse2) (* .cse1 .cse2 .cse2) (* 18446744073709551615 .cse0 .cse2) .cse2) 18446744073709551616) 0))) is different from true [2023-11-24 21:52:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-24 21:52:51,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:51,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204642564] [2023-11-24 21:52:51,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:52:51,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619297958] [2023-11-24 21:52:51,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619297958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:52:51,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:52:51,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-24 21:52:51,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932403658] [2023-11-24 21:52:51,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:52:51,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 21:52:51,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:51,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 21:52:51,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=432, Unknown=5, NotChecked=132, Total=650 [2023-11-24 21:52:51,889 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 18 states have internal predecessors, (25), 8 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:52:56,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1]