./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-97.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-97.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d5e4cb9ac1eb80d849fbfc0dc84b475939efb7668f397b899cd3f0a90b7f4ba1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:38:48,643 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:38:48,763 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:38:48,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:38:48,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:38:48,813 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:38:48,814 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:38:48,814 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:38:48,816 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:38:48,821 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:38:48,821 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:38:48,822 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:38:48,823 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:38:48,824 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:38:48,825 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:38:48,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:38:48,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:38:48,826 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:38:48,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:38:48,827 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:38:48,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:38:48,828 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:38:48,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:38:48,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:38:48,830 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:38:48,830 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:38:48,831 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:38:48,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:38:48,832 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:38:48,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:38:48,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:38:48,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:38:48,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:38:48,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:38:48,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:38:48,836 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:38:48,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:38:48,836 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:38:48,836 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:38:48,837 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:38:48,837 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:38:48,837 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:38:48,838 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_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5e4cb9ac1eb80d849fbfc0dc84b475939efb7668f397b899cd3f0a90b7f4ba1 [2023-11-23 22:38:49,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:38:49,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:38:49,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:38:49,240 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:38:49,240 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:38:49,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-97.i [2023-11-23 22:38:52,254 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:38:52,507 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:38:52,508 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-97.i [2023-11-23 22:38:52,520 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/data/a54b83ae8/fc47259eb0f745e18f557e2b639b0664/FLAG4273a690a [2023-11-23 22:38:52,551 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/data/a54b83ae8/fc47259eb0f745e18f557e2b639b0664 [2023-11-23 22:38:52,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:38:52,560 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:38:52,564 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:38:52,565 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:38:52,571 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:38:52,572 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:52" (1/1) ... [2023-11-23 22:38:52,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8258b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:52, skipping insertion in model container [2023-11-23 22:38:52,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:52" (1/1) ... [2023-11-23 22:38:52,634 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:38:52,853 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_ab220bf9-fd88-44f6-9341-84b6e13a39bc/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-97.i[916,929] [2023-11-23 22:38:52,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:38:52,988 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:38:53,007 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_ab220bf9-fd88-44f6-9341-84b6e13a39bc/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-97.i[916,929] [2023-11-23 22:38:53,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:38:53,150 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:38:53,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53 WrapperNode [2023-11-23 22:38:53,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:38:53,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:38:53,153 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:38:53,154 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:38:53,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,187 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,267 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 184 [2023-11-23 22:38:53,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:38:53,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:38:53,271 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:38:53,271 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:38:53,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,293 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,340 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:38:53,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,342 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,359 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,381 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:38:53,402 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:38:53,403 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:38:53,403 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:38:53,404 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (1/1) ... [2023-11-23 22:38:53,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:38:53,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:53,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:38:53,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:38:53,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:38:53,482 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 22:38:53,482 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 22:38:53,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:38:53,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:38:53,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:38:53,578 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:38:53,581 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:38:54,078 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:38:54,129 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:38:54,130 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:38:54,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:38:54 BoogieIcfgContainer [2023-11-23 22:38:54,131 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:38:54,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:38:54,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:38:54,137 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:38:54,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:38:52" (1/3) ... [2023-11-23 22:38:54,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3034a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:38:54, skipping insertion in model container [2023-11-23 22:38:54,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:53" (2/3) ... [2023-11-23 22:38:54,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3034a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:38:54, skipping insertion in model container [2023-11-23 22:38:54,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:38:54" (3/3) ... [2023-11-23 22:38:54,140 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-while_file-97.i [2023-11-23 22:38:54,160 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:38:54,160 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:38:54,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:38:54,221 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;@4b38efa9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:38:54,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:38:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 49 states have internal predecessors, (73), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 22:38:54,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-23 22:38:54,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:38:54,244 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:54,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:38:54,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:54,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1821303811, now seen corresponding path program 1 times [2023-11-23 22:38:54,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:54,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696637758] [2023-11-23 22:38:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:54,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:54,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:54,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696637758] [2023-11-23 22:38:54,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 22:38:54,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080133947] [2023-11-23 22:38:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:54,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:54,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:54,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:54,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:38:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:54,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 22:38:54,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2023-11-23 22:38:54,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:54,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080133947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:54,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:54,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:38:54,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788910034] [2023-11-23 22:38:54,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:54,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:38:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:54,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:38:54,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:38:54,963 INFO L87 Difference]: Start difference. First operand has 75 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 49 states have internal predecessors, (73), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (24), 1 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-23 22:38:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:38:55,014 INFO L93 Difference]: Finished difference Result 147 states and 264 transitions. [2023-11-23 22:38:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:38:55,017 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (24), 1 states have call predecessors, (24), 2 states have call successors, (24) Word has length 155 [2023-11-23 22:38:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:38:55,026 INFO L225 Difference]: With dead ends: 147 [2023-11-23 22:38:55,026 INFO L226 Difference]: Without dead ends: 73 [2023-11-23 22:38:55,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:38:55,034 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:38:55,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:38:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-23 22:38:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-23 22:38:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.446808510638298) internal successors, (68), 47 states have internal predecessors, (68), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 22:38:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 116 transitions. [2023-11-23 22:38:55,097 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 116 transitions. Word has length 155 [2023-11-23 22:38:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:38:55,100 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 116 transitions. [2023-11-23 22:38:55,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (24), 1 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-23 22:38:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 116 transitions. [2023-11-23 22:38:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-23 22:38:55,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:38:55,108 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:55,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:55,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 22:38:55,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:38:55,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1769755653, now seen corresponding path program 1 times [2023-11-23 22:38:55,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:55,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270226024] [2023-11-23 22:38:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:55,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:55,480 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:38:55,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816545646] [2023-11-23 22:38:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:55,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:55,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:55,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:55,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:38:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:55,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:38:55,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2023-11-23 22:38:55,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:55,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:55,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270226024] [2023-11-23 22:38:55,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:38:55,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816545646] [2023-11-23 22:38:55,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816545646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:55,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:55,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:38:55,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30643898] [2023-11-23 22:38:55,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:55,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:38:55,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:55,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:38:55,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:38:55,806 INFO L87 Difference]: Start difference. First operand 73 states and 116 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) [2023-11-23 22:38:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:38:55,908 INFO L93 Difference]: Finished difference Result 208 states and 330 transitions. [2023-11-23 22:38:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:38:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) Word has length 155 [2023-11-23 22:38:55,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:38:55,913 INFO L225 Difference]: With dead ends: 208 [2023-11-23 22:38:55,913 INFO L226 Difference]: Without dead ends: 136 [2023-11-23 22:38:55,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:38:55,916 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 94 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:38:55,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 289 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:38:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-23 22:38:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 83. [2023-11-23 22:38:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 57 states have internal predecessors, (84), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 22:38:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 132 transitions. [2023-11-23 22:38:55,934 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 132 transitions. Word has length 155 [2023-11-23 22:38:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:38:55,936 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 132 transitions. [2023-11-23 22:38:55,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) [2023-11-23 22:38:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 132 transitions. [2023-11-23 22:38:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-23 22:38:55,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:38:55,939 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:55,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:56,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:56,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:38:56,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1761712083, now seen corresponding path program 1 times [2023-11-23 22:38:56,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:56,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097528377] [2023-11-23 22:38:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:56,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:56,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:38:56,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516723603] [2023-11-23 22:38:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:56,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:56,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:56,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:56,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:38:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:56,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 22:38:56,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 474 proven. 189 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2023-11-23 22:38:58,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:00,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:00,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097528377] [2023-11-23 22:39:00,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:39:00,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516723603] [2023-11-23 22:39:00,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516723603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:00,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:39:00,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-23 22:39:00,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283698519] [2023-11-23 22:39:00,146 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:00,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 22:39:00,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:00,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 22:39:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2023-11-23 22:39:00,149 INFO L87 Difference]: Start difference. First operand 83 states and 132 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2023-11-23 22:39:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:39:02,406 INFO L93 Difference]: Finished difference Result 342 states and 492 transitions. [2023-11-23 22:39:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-23 22:39:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 155 [2023-11-23 22:39:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:39:02,412 INFO L225 Difference]: With dead ends: 342 [2023-11-23 22:39:02,412 INFO L226 Difference]: Without dead ends: 260 [2023-11-23 22:39:02,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1269, Invalid=3843, Unknown=0, NotChecked=0, Total=5112 [2023-11-23 22:39:02,423 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 760 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 22:39:02,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 441 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 22:39:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-23 22:39:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 115. [2023-11-23 22:39:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 84 states have internal predecessors, (117), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 22:39:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 165 transitions. [2023-11-23 22:39:02,482 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 165 transitions. Word has length 155 [2023-11-23 22:39:02,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:39:02,485 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 165 transitions. [2023-11-23 22:39:02,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2023-11-23 22:39:02,486 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 165 transitions. [2023-11-23 22:39:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-23 22:39:02,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:39:02,489 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:02,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 22:39:02,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:02,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:39:02,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:02,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2094702573, now seen corresponding path program 1 times [2023-11-23 22:39:02,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:02,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563088455] [2023-11-23 22:39:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:02,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:02,756 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:39:02,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79554507] [2023-11-23 22:39:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:02,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:02,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:02,758 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:02,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:39:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:03,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:39:03,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 365 proven. 12 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2023-11-23 22:39:03,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2023-11-23 22:39:03,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:03,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563088455] [2023-11-23 22:39:03,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:39:03,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79554507] [2023-11-23 22:39:03,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79554507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:03,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:39:03,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-23 22:39:03,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008125475] [2023-11-23 22:39:03,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:03,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:39:03,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:03,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:39:03,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:39:03,309 INFO L87 Difference]: Start difference. First operand 115 states and 165 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-23 22:39:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:39:03,792 INFO L93 Difference]: Finished difference Result 305 states and 414 transitions. [2023-11-23 22:39:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 22:39:03,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 156 [2023-11-23 22:39:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:39:03,795 INFO L225 Difference]: With dead ends: 305 [2023-11-23 22:39:03,796 INFO L226 Difference]: Without dead ends: 191 [2023-11-23 22:39:03,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 303 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:39:03,798 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 184 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:39:03,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 271 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:39:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-23 22:39:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 103. [2023-11-23 22:39:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 71 states have internal predecessors, (91), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 22:39:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 139 transitions. [2023-11-23 22:39:03,830 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 139 transitions. Word has length 156 [2023-11-23 22:39:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:39:03,831 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 139 transitions. [2023-11-23 22:39:03,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-23 22:39:03,832 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 139 transitions. [2023-11-23 22:39:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-23 22:39:03,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:39:03,834 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:03,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:04,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:04,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:39:04,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:04,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2086659003, now seen corresponding path program 1 times [2023-11-23 22:39:04,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:04,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95115146] [2023-11-23 22:39:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:04,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:04,103 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:39:04,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945136335] [2023-11-23 22:39:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:04,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:04,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:04,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:04,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab220bf9-fd88-44f6-9341-84b6e13a39bc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:39:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:04,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:39:04,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 528 proven. 105 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2023-11-23 22:39:05,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:41,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95115146] [2023-11-23 22:39:41,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:39:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945136335] [2023-11-23 22:39:41,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945136335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:41,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:39:41,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-23 22:39:41,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12753127] [2023-11-23 22:39:41,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:41,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:39:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:39:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=181, Unknown=17, NotChecked=0, Total=240 [2023-11-23 22:39:41,610 INFO L87 Difference]: Start difference. First operand 103 states and 139 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24)