./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-34.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-34.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme --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 8509af5ddea8b4969815a398e5f07c16448270bd1737b92218393c93b8a3a0c1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:58:19,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:58:19,669 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:58:19,679 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:58:19,680 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:58:19,737 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:58:19,738 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:58:19,739 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:58:19,740 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:58:19,745 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:58:19,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:58:19,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:58:19,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:58:19,748 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:58:19,749 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:58:19,749 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:58:19,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:58:19,750 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:58:19,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:58:19,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:58:19,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:58:19,752 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:58:19,752 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:58:19,752 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:58:19,753 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:58:19,753 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:58:19,754 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:58:19,755 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:58:19,755 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:58:19,755 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:58:19,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:58:19,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:19,765 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:58:19,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:58:19,766 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:58:19,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:58:19,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:58:19,767 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:58:19,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:58:19,767 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:58:19,767 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:58:19,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:58:19,768 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_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8509af5ddea8b4969815a398e5f07c16448270bd1737b92218393c93b8a3a0c1 [2023-11-26 11:58:20,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:58:20,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:58:20,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:58:20,128 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:58:20,129 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:58:20,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-34.i [2023-11-26 11:58:23,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:58:23,380 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:58:23,381 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-34.i [2023-11-26 11:58:23,392 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/data/870a354df/81bd16122cba45e19d7a67b94734dcd8/FLAG265b71c74 [2023-11-26 11:58:23,407 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/data/870a354df/81bd16122cba45e19d7a67b94734dcd8 [2023-11-26 11:58:23,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:58:23,411 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:58:23,413 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:23,413 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:58:23,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:58:23,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24825a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23, skipping insertion in model container [2023-11-26 11:58:23,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,457 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:58:23,615 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_559cf735-8b0e-4e07-874d-576647384f37/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-34.i[919,932] [2023-11-26 11:58:23,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:23,714 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:58:23,725 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_559cf735-8b0e-4e07-874d-576647384f37/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-34.i[919,932] [2023-11-26 11:58:23,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:23,810 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:58:23,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23 WrapperNode [2023-11-26 11:58:23,811 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:23,812 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:23,812 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:58:23,812 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:58:23,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,844 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,898 INFO L138 Inliner]: procedures = 26, calls = 33, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 225 [2023-11-26 11:58:23,899 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:23,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:58:23,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:58:23,900 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:58:23,913 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,918 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,945 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:58:23,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,960 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,965 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,972 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:24,020 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:58:24,021 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:58:24,021 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:58:24,022 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:58:24,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:24,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:24,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:24,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:58:24,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:58:24,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:58:24,159 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:58:24,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:58:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:58:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:58:24,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:58:24,309 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:58:24,311 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:58:24,860 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:58:24,915 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:58:24,915 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:58:24,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:24 BoogieIcfgContainer [2023-11-26 11:58:24,916 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:58:24,920 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:58:24,920 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:58:24,923 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:58:24,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:58:23" (1/3) ... [2023-11-26 11:58:24,925 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d67d332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:24, skipping insertion in model container [2023-11-26 11:58:24,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23" (2/3) ... [2023-11-26 11:58:24,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d67d332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:24, skipping insertion in model container [2023-11-26 11:58:24,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:24" (3/3) ... [2023-11-26 11:58:24,929 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-ps-ci_file-34.i [2023-11-26 11:58:24,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:58:24,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:58:25,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:58:25,025 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;@51f9ae75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:58:25,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:58:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 60 states have (on average 1.6) internal successors, (96), 61 states have internal predecessors, (96), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-26 11:58:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-26 11:58:25,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:25,049 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:25,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:25,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:25,057 INFO L85 PathProgramCache]: Analyzing trace with hash 345858601, now seen corresponding path program 1 times [2023-11-26 11:58:25,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:25,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418581562] [2023-11-26 11:58:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:25,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:25,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:25,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418581562] [2023-11-26 11:58:25,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:58:25,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355805973] [2023-11-26 11:58:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:25,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:25,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:25,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:25,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:58:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:25,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:58:25,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2023-11-26 11:58:25,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:25,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355805973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:25,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:25,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:25,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153405689] [2023-11-26 11:58:25,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:25,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:58:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:58:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:58:25,803 INFO L87 Difference]: Start difference. First operand has 83 states, 60 states have (on average 1.6) internal successors, (96), 61 states have internal predecessors, (96), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-26 11:58:25,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:25,880 INFO L93 Difference]: Finished difference Result 163 states and 290 transitions. [2023-11-26 11:58:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:58:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 2 states have call successors, (20) Word has length 137 [2023-11-26 11:58:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:25,910 INFO L225 Difference]: With dead ends: 163 [2023-11-26 11:58:25,910 INFO L226 Difference]: Without dead ends: 81 [2023-11-26 11:58:25,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:58:25,919 INFO L413 NwaCegarLoop]: 128 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, 128 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 [2023-11-26 11:58:25,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:58:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-26 11:58:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-26 11:58:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 59 states have internal predecessors, (91), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-26 11:58:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 131 transitions. [2023-11-26 11:58:26,003 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 131 transitions. Word has length 137 [2023-11-26 11:58:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:26,004 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 131 transitions. [2023-11-26 11:58:26,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-26 11:58:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 131 transitions. [2023-11-26 11:58:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-26 11:58:26,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:26,016 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:26,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:26,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:26,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:26,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1505009051, now seen corresponding path program 1 times [2023-11-26 11:58:26,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:26,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66381369] [2023-11-26 11:58:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:26,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:26,339 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:26,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383701909] [2023-11-26 11:58:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:26,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:26,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:26,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:26,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:58:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:26,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:58:26,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-26 11:58:26,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:26,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:26,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66381369] [2023-11-26 11:58:26,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:26,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383701909] [2023-11-26 11:58:26,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383701909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:26,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:26,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:58:26,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351379065] [2023-11-26 11:58:26,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:26,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:58:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:26,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:58:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:58:26,865 INFO L87 Difference]: Start difference. First operand 81 states and 131 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-26 11:58:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:27,222 INFO L93 Difference]: Finished difference Result 242 states and 390 transitions. [2023-11-26 11:58:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:58:27,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 137 [2023-11-26 11:58:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:27,232 INFO L225 Difference]: With dead ends: 242 [2023-11-26 11:58:27,232 INFO L226 Difference]: Without dead ends: 162 [2023-11-26 11:58:27,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:58:27,239 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 153 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:27,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 461 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:58:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-26 11:58:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 83. [2023-11-26 11:58:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 61 states have internal predecessors, (93), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-26 11:58:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 133 transitions. [2023-11-26 11:58:27,275 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 133 transitions. Word has length 137 [2023-11-26 11:58:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:27,279 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 133 transitions. [2023-11-26 11:58:27,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-26 11:58:27,280 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 133 transitions. [2023-11-26 11:58:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 11:58:27,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:27,283 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:27,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:27,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 11:58:27,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:27,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:27,490 INFO L85 PathProgramCache]: Analyzing trace with hash 37861018, now seen corresponding path program 1 times [2023-11-26 11:58:27,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:27,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224065988] [2023-11-26 11:58:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:27,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:27,554 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:27,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457062526] [2023-11-26 11:58:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:27,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:27,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:27,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:27,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:58:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:27,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:58:27,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-26 11:58:27,901 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:27,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:27,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224065988] [2023-11-26 11:58:27,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:27,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457062526] [2023-11-26 11:58:27,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457062526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:27,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:27,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:58:27,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679434200] [2023-11-26 11:58:27,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:27,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:58:27,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:27,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:58:27,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:58:27,905 INFO L87 Difference]: Start difference. First operand 83 states and 133 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-26 11:58:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:28,041 INFO L93 Difference]: Finished difference Result 276 states and 441 transitions. [2023-11-26 11:58:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:58:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 138 [2023-11-26 11:58:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:28,045 INFO L225 Difference]: With dead ends: 276 [2023-11-26 11:58:28,045 INFO L226 Difference]: Without dead ends: 194 [2023-11-26 11:58:28,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:58:28,047 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 149 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:28,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 409 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:58:28,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-26 11:58:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 165. [2023-11-26 11:58:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 122 states have (on average 1.5163934426229508) internal successors, (185), 122 states have internal predecessors, (185), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-26 11:58:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 265 transitions. [2023-11-26 11:58:28,096 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 265 transitions. Word has length 138 [2023-11-26 11:58:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:28,097 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 265 transitions. [2023-11-26 11:58:28,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-26 11:58:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 265 transitions. [2023-11-26 11:58:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-26 11:58:28,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:28,101 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:28,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:28,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:28,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:28,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:28,309 INFO L85 PathProgramCache]: Analyzing trace with hash -327752355, now seen corresponding path program 1 times [2023-11-26 11:58:28,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:28,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339222094] [2023-11-26 11:58:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:28,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:28,351 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:28,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027735848] [2023-11-26 11:58:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:28,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:28,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:28,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:28,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:58:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:28,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:58:28,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 393 proven. 24 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-11-26 11:58:28,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-11-26 11:58:28,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339222094] [2023-11-26 11:58:28,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027735848] [2023-11-26 11:58:28,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027735848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:28,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:28,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-26 11:58:28,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435820442] [2023-11-26 11:58:28,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:28,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:58:28,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:58:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:58:28,908 INFO L87 Difference]: Start difference. First operand 165 states and 265 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 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) [2023-11-26 11:58:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:29,443 INFO L93 Difference]: Finished difference Result 262 states and 409 transitions. [2023-11-26 11:58:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:58:29,444 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 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 139 [2023-11-26 11:58:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:29,447 INFO L225 Difference]: With dead ends: 262 [2023-11-26 11:58:29,447 INFO L226 Difference]: Without dead ends: 179 [2023-11-26 11:58:29,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:58:29,449 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 327 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:29,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 612 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:58:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-26 11:58:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 173. [2023-11-26 11:58:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 40 states have call successors, (40), 4 states have call predecessors, (40), 4 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-26 11:58:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 269 transitions. [2023-11-26 11:58:29,482 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 269 transitions. Word has length 139 [2023-11-26 11:58:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:29,483 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 269 transitions. [2023-11-26 11:58:29,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 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) [2023-11-26 11:58:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 269 transitions. [2023-11-26 11:58:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-26 11:58:29,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:29,486 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:29,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:29,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:29,694 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:29,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1607616033, now seen corresponding path program 1 times [2023-11-26 11:58:29,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:29,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880994530] [2023-11-26 11:58:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:29,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:29,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:29,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093133644] [2023-11-26 11:58:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:29,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:29,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:29,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:29,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:58:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:30,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-26 11:58:30,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 338 proven. 81 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2023-11-26 11:58:35,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-26 11:58:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880994530] [2023-11-26 11:58:42,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:42,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093133644] [2023-11-26 11:58:42,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093133644] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:58:42,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:58:42,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20] total 28 [2023-11-26 11:58:42,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286417455] [2023-11-26 11:58:42,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:42,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:58:42,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:42,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:58:42,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:58:42,664 INFO L87 Difference]: Start difference. First operand 173 states and 269 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-26 11:59:16,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-26 11:59:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:18,575 INFO L93 Difference]: Finished difference Result 520 states and 794 transitions. [2023-11-26 11:59:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:59:18,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 139 [2023-11-26 11:59:18,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:18,583 INFO L225 Difference]: With dead ends: 520 [2023-11-26 11:59:18,584 INFO L226 Difference]: Without dead ends: 348 [2023-11-26 11:59:18,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2023-11-26 11:59:18,586 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 432 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:18,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 531 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 373 Invalid, 1 Unknown, 0 Unchecked, 15.0s Time] [2023-11-26 11:59:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-26 11:59:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 237. [2023-11-26 11:59:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 180 states have (on average 1.45) internal successors, (261), 182 states have internal predecessors, (261), 50 states have call successors, (50), 6 states have call predecessors, (50), 6 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-26 11:59:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 361 transitions. [2023-11-26 11:59:18,657 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 361 transitions. Word has length 139 [2023-11-26 11:59:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:18,658 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 361 transitions. [2023-11-26 11:59:18,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-26 11:59:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 361 transitions. [2023-11-26 11:59:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-26 11:59:18,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:18,661 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:18,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_559cf735-8b0e-4e07-874d-576647384f37/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0