./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-57.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_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/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_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-57.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/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_74d9d8c6-034d-4990-a6c6-0375d1dc1269/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 35897ca10739dfe50f578706614b96ade5d7e66bf9cbebf31dd49bae05c8bb42 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:50:15,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:50:15,836 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:50:15,846 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:50:15,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:50:15,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:50:15,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:50:15,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:50:15,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:50:15,902 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:50:15,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:50:15,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:50:15,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:50:15,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:50:15,908 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:50:15,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:50:15,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:50:15,910 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:50:15,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:50:15,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:50:15,911 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:50:15,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:50:15,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:50:15,912 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:50:15,913 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:50:15,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:50:15,914 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:50:15,915 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:50:15,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:50:15,916 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:50:15,917 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:50:15,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:15,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:50:15,918 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:50:15,918 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:50:15,918 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:50:15,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:50:15,919 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:50:15,919 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:50:15,919 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:50:15,919 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:50:15,920 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:50:15,920 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_74d9d8c6-034d-4990-a6c6-0375d1dc1269/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35897ca10739dfe50f578706614b96ade5d7e66bf9cbebf31dd49bae05c8bb42 [2023-11-26 11:50:16,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:50:16,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:50:16,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:50:16,250 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:50:16,251 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:50:16,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-57.i [2023-11-26 11:50:19,501 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:50:19,807 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:50:19,808 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-57.i [2023-11-26 11:50:19,825 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/data/8780fe30e/094b6dad6e1a44caac1576db35e8951f/FLAGb2f22914a [2023-11-26 11:50:19,849 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/data/8780fe30e/094b6dad6e1a44caac1576db35e8951f [2023-11-26 11:50:19,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:50:19,856 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:50:19,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:19,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:50:19,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:50:19,867 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:19" (1/1) ... [2023-11-26 11:50:19,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd84c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:19, skipping insertion in model container [2023-11-26 11:50:19,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:19" (1/1) ... [2023-11-26 11:50:19,931 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:50:20,113 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_74d9d8c6-034d-4990-a6c6-0375d1dc1269/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-57.i[916,929] [2023-11-26 11:50:20,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:20,245 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:50:20,260 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_74d9d8c6-034d-4990-a6c6-0375d1dc1269/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-57.i[916,929] [2023-11-26 11:50:20,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:20,375 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:50:20,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20 WrapperNode [2023-11-26 11:50:20,376 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:20,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:20,378 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:50:20,378 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:50:20,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,410 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,487 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 262 [2023-11-26 11:50:20,488 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:20,489 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:50:20,489 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:50:20,489 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:50:20,507 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,513 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,581 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 11:50:20,587 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,588 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,616 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,620 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,635 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:50:20,645 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:50:20,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:50:20,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:50:20,646 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:20,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:20,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:50:20,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:50:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:50:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:50:20,731 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:50:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:50:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:50:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:50:20,869 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:50:20,872 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:50:21,587 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:50:21,647 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:50:21,649 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:50:21,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:21 BoogieIcfgContainer [2023-11-26 11:50:21,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:50:21,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:50:21,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:50:21,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:50:21,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:50:19" (1/3) ... [2023-11-26 11:50:21,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383d637b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:21, skipping insertion in model container [2023-11-26 11:50:21,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (2/3) ... [2023-11-26 11:50:21,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383d637b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:21, skipping insertion in model container [2023-11-26 11:50:21,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:21" (3/3) ... [2023-11-26 11:50:21,663 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount100_file-57.i [2023-11-26 11:50:21,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:50:21,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:50:21,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:50:21,763 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;@2c894861, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:50:21,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:50:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 64 states have (on average 1.515625) internal successors, (97), 65 states have internal predecessors, (97), 36 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-26 11:50:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-11-26 11:50:21,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:21,801 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:21,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:21,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash 935349993, now seen corresponding path program 1 times [2023-11-26 11:50:21,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:21,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390060964] [2023-11-26 11:50:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:21,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:22,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:22,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390060964] [2023-11-26 11:50:22,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:50:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618607867] [2023-11-26 11:50:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:22,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:22,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:22,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:22,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:50:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:22,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:50:22,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2023-11-26 11:50:22,566 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:22,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618607867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:22,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:22,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:22,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228934032] [2023-11-26 11:50:22,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:50:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:22,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:50:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:50:22,626 INFO L87 Difference]: Start difference. First operand has 103 states, 64 states have (on average 1.515625) internal successors, (97), 65 states have internal predecessors, (97), 36 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (36), 1 states have call predecessors, (36), 2 states have call successors, (36) [2023-11-26 11:50:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:22,698 INFO L93 Difference]: Finished difference Result 203 states and 372 transitions. [2023-11-26 11:50:22,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:50:22,701 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (36), 1 states have call predecessors, (36), 2 states have call successors, (36) Word has length 223 [2023-11-26 11:50:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:22,715 INFO L225 Difference]: With dead ends: 203 [2023-11-26 11:50:22,715 INFO L226 Difference]: Without dead ends: 101 [2023-11-26 11:50:22,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 222 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 11:50:22,729 INFO L413 NwaCegarLoop]: 161 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, 161 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 11:50:22,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 161 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-26 11:50:22,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-26 11:50:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 63 states have (on average 1.4603174603174602) internal successors, (92), 63 states have internal predecessors, (92), 36 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-26 11:50:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 164 transitions. [2023-11-26 11:50:22,814 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 164 transitions. Word has length 223 [2023-11-26 11:50:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:22,815 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 164 transitions. [2023-11-26 11:50:22,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (36), 1 states have call predecessors, (36), 2 states have call successors, (36) [2023-11-26 11:50:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 164 transitions. [2023-11-26 11:50:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-11-26 11:50:22,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:22,826 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:22,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:23,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:23,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:23,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2074465649, now seen corresponding path program 1 times [2023-11-26 11:50:23,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:23,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107979535] [2023-11-26 11:50:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:23,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:23,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:23,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978651082] [2023-11-26 11:50:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:23,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:23,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:23,126 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:23,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:50:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:50:23,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 915 proven. 81 refuted. 0 times theorem prover too weak. 1524 trivial. 0 not checked. [2023-11-26 11:50:23,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 24 proven. 81 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2023-11-26 11:50:24,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:24,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107979535] [2023-11-26 11:50:24,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:24,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978651082] [2023-11-26 11:50:24,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978651082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:24,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:24,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:50:24,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503590525] [2023-11-26 11:50:24,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:24,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:50:24,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:24,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:50:24,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:24,199 INFO L87 Difference]: Start difference. First operand 101 states and 164 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-26 11:50:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:24,646 INFO L93 Difference]: Finished difference Result 222 states and 355 transitions. [2023-11-26 11:50:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:50:24,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 223 [2023-11-26 11:50:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:24,659 INFO L225 Difference]: With dead ends: 222 [2023-11-26 11:50:24,659 INFO L226 Difference]: Without dead ends: 122 [2023-11-26 11:50:24,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:50:24,664 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 70 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:24,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 304 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:50:24,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-26 11:50:24,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2023-11-26 11:50:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 71 states have internal predecessors, (97), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-26 11:50:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 185 transitions. [2023-11-26 11:50:24,716 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 185 transitions. Word has length 223 [2023-11-26 11:50:24,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:24,719 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 185 transitions. [2023-11-26 11:50:24,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-26 11:50:24,720 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 185 transitions. [2023-11-26 11:50:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-26 11:50:24,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:24,727 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:24,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:24,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:24,934 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:24,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash 972532047, now seen corresponding path program 1 times [2023-11-26 11:50:24,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:24,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565249027] [2023-11-26 11:50:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:24,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:25,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:25,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973188452] [2023-11-26 11:50:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:25,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:25,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:25,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:25,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:50:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:25,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:50:25,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1253 proven. 42 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-26 11:50:25,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 63 proven. 42 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2023-11-26 11:50:25,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:25,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565249027] [2023-11-26 11:50:25,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:25,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973188452] [2023-11-26 11:50:25,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973188452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:25,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:25,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:50:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299489222] [2023-11-26 11:50:25,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:25,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:50:25,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:25,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:50:25,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:25,765 INFO L87 Difference]: Start difference. First operand 117 states and 185 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2023-11-26 11:50:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:26,132 INFO L93 Difference]: Finished difference Result 229 states and 356 transitions. [2023-11-26 11:50:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:50:26,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 224 [2023-11-26 11:50:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:26,137 INFO L225 Difference]: With dead ends: 229 [2023-11-26 11:50:26,137 INFO L226 Difference]: Without dead ends: 125 [2023-11-26 11:50:26,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:50:26,139 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 145 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:26,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 258 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:50:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-26 11:50:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2023-11-26 11:50:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.3424657534246576) internal successors, (98), 74 states have internal predecessors, (98), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-26 11:50:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 186 transitions. [2023-11-26 11:50:26,164 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 186 transitions. Word has length 224 [2023-11-26 11:50:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:26,165 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 186 transitions. [2023-11-26 11:50:26,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2023-11-26 11:50:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 186 transitions. [2023-11-26 11:50:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-26 11:50:26,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:26,169 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:26,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:26,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:26,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:26,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -541964217, now seen corresponding path program 1 times [2023-11-26 11:50:26,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:26,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791368607] [2023-11-26 11:50:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:26,432 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:26,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215420639] [2023-11-26 11:50:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:26,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:26,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:26,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:26,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:50:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:26,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:50:26,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1293 proven. 54 refuted. 0 times theorem prover too weak. 1173 trivial. 0 not checked. [2023-11-26 11:50:27,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 51 proven. 54 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2023-11-26 11:50:27,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:27,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791368607] [2023-11-26 11:50:27,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:27,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215420639] [2023-11-26 11:50:27,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215420639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:27,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:27,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-26 11:50:27,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822614769] [2023-11-26 11:50:27,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:27,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:50:27,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:27,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:50:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:50:27,777 INFO L87 Difference]: Start difference. First operand 121 states and 186 transitions. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 4 states have call successors, (72), 3 states have call predecessors, (72), 5 states have return successors, (72), 4 states have call predecessors, (72), 4 states have call successors, (72) [2023-11-26 11:50:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:28,902 INFO L93 Difference]: Finished difference Result 393 states and 598 transitions. [2023-11-26 11:50:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:50:28,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 4 states have call successors, (72), 3 states have call predecessors, (72), 5 states have return successors, (72), 4 states have call predecessors, (72), 4 states have call successors, (72) Word has length 225 [2023-11-26 11:50:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:28,907 INFO L225 Difference]: With dead ends: 393 [2023-11-26 11:50:28,907 INFO L226 Difference]: Without dead ends: 285 [2023-11-26 11:50:28,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:50:28,909 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 473 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:28,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 657 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:50:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-26 11:50:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 190. [2023-11-26 11:50:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 110 states have (on average 1.2727272727272727) internal successors, (140), 110 states have internal predecessors, (140), 72 states have call successors, (72), 7 states have call predecessors, (72), 7 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-26 11:50:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 284 transitions. [2023-11-26 11:50:28,990 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 284 transitions. Word has length 225 [2023-11-26 11:50:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:28,992 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 284 transitions. [2023-11-26 11:50:28,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 4 states have call successors, (72), 3 states have call predecessors, (72), 5 states have return successors, (72), 4 states have call predecessors, (72), 4 states have call successors, (72) [2023-11-26 11:50:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 284 transitions. [2023-11-26 11:50:28,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-26 11:50:28,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:28,996 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:29,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:29,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:29,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:29,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:29,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1146979525, now seen corresponding path program 1 times [2023-11-26 11:50:29,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:29,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39600940] [2023-11-26 11:50:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:29,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:29,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:29,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274487496] [2023-11-26 11:50:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:29,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:29,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:29,300 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:29,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:50:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:29,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:50:29,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1526 proven. 108 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-11-26 11:50:30,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2023-11-26 11:50:30,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:30,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39600940] [2023-11-26 11:50:30,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:30,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274487496] [2023-11-26 11:50:30,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274487496] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:30,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:30,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 20 [2023-11-26 11:50:30,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76880951] [2023-11-26 11:50:30,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:30,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:50:30,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:30,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:50:30,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:50:30,995 INFO L87 Difference]: Start difference. First operand 190 states and 284 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 1 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2023-11-26 11:50:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:33,967 INFO L93 Difference]: Finished difference Result 710 states and 1043 transitions. [2023-11-26 11:50:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:50:33,968 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), 1 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) Word has length 225 [2023-11-26 11:50:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:33,974 INFO L225 Difference]: With dead ends: 710 [2023-11-26 11:50:33,974 INFO L226 Difference]: Without dead ends: 602 [2023-11-26 11:50:33,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2023-11-26 11:50:33,978 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 633 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:33,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 918 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-26 11:50:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-11-26 11:50:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 401. [2023-11-26 11:50:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 251 states have (on average 1.3107569721115537) internal successors, (329), 253 states have internal predecessors, (329), 134 states have call successors, (134), 15 states have call predecessors, (134), 15 states have return successors, (134), 132 states have call predecessors, (134), 134 states have call successors, (134) [2023-11-26 11:50:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 597 transitions. [2023-11-26 11:50:34,116 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 597 transitions. Word has length 225 [2023-11-26 11:50:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:34,120 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 597 transitions. [2023-11-26 11:50:34,120 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), 1 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2023-11-26 11:50:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 597 transitions. [2023-11-26 11:50:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-26 11:50:34,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:34,125 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:34,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 11:50:34,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:34,333 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:34,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:34,333 INFO L85 PathProgramCache]: Analyzing trace with hash 709156031, now seen corresponding path program 1 times [2023-11-26 11:50:34,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:34,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162552771] [2023-11-26 11:50:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:34,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:34,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791619287] [2023-11-26 11:50:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:34,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:34,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:34,392 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:34,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:50:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:34,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:50:34,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 833 proven. 84 refuted. 0 times theorem prover too weak. 1603 trivial. 0 not checked. [2023-11-26 11:50:34,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2023-11-26 11:50:35,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162552771] [2023-11-26 11:50:35,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791619287] [2023-11-26 11:50:35,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791619287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:35,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:35,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-26 11:50:35,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646471640] [2023-11-26 11:50:35,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:35,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:50:35,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:35,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:50:35,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:50:35,287 INFO L87 Difference]: Start difference. First operand 401 states and 597 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-26 11:50:36,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:36,516 INFO L93 Difference]: Finished difference Result 1438 states and 2088 transitions. [2023-11-26 11:50:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 11:50:36,520 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) Word has length 225 [2023-11-26 11:50:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:36,533 INFO L225 Difference]: With dead ends: 1438 [2023-11-26 11:50:36,533 INFO L226 Difference]: Without dead ends: 1123 [2023-11-26 11:50:36,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 442 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2023-11-26 11:50:36,537 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 428 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:36,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 690 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:50:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2023-11-26 11:50:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 738. [2023-11-26 11:50:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 471 states have (on average 1.2887473460721868) internal successors, (607), 475 states have internal predecessors, (607), 232 states have call successors, (232), 34 states have call predecessors, (232), 34 states have return successors, (232), 228 states have call predecessors, (232), 232 states have call successors, (232) [2023-11-26 11:50:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1071 transitions. [2023-11-26 11:50:36,768 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1071 transitions. Word has length 225 [2023-11-26 11:50:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:36,769 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1071 transitions. [2023-11-26 11:50:36,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-26 11:50:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1071 transitions. [2023-11-26 11:50:36,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-11-26 11:50:36,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:36,774 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:36,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:36,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:36,982 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:36,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:36,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1800364658, now seen corresponding path program 1 times [2023-11-26 11:50:36,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:36,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433899440] [2023-11-26 11:50:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:36,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:37,034 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:37,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643071979] [2023-11-26 11:50:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:37,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:37,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:37,037 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:37,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:50:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:37,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:50:37,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2023-11-26 11:50:37,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:37,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:37,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433899440] [2023-11-26 11:50:37,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:37,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643071979] [2023-11-26 11:50:37,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643071979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:37,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:37,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:37,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333118121] [2023-11-26 11:50:37,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:37,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:37,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:37,561 INFO L87 Difference]: Start difference. First operand 738 states and 1071 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 1 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2023-11-26 11:50:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:37,913 INFO L93 Difference]: Finished difference Result 2021 states and 2943 transitions. [2023-11-26 11:50:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:37,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 1 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) Word has length 226 [2023-11-26 11:50:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:37,924 INFO L225 Difference]: With dead ends: 2021 [2023-11-26 11:50:37,925 INFO L226 Difference]: Without dead ends: 1373 [2023-11-26 11:50:37,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:37,928 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 47 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:37,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 300 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:37,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2023-11-26 11:50:38,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1329. [2023-11-26 11:50:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 838 states have (on average 1.266109785202864) internal successors, (1061), 846 states have internal predecessors, (1061), 428 states have call successors, (428), 62 states have call predecessors, (428), 62 states have return successors, (428), 420 states have call predecessors, (428), 428 states have call successors, (428) [2023-11-26 11:50:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1917 transitions. [2023-11-26 11:50:38,273 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1917 transitions. Word has length 226 [2023-11-26 11:50:38,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:38,274 INFO L495 AbstractCegarLoop]: Abstraction has 1329 states and 1917 transitions. [2023-11-26 11:50:38,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 1 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2023-11-26 11:50:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1917 transitions. [2023-11-26 11:50:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-11-26 11:50:38,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:38,279 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:38,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:38,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:38,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:38,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:38,513 INFO L85 PathProgramCache]: Analyzing trace with hash 965208786, now seen corresponding path program 1 times [2023-11-26 11:50:38,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:38,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586198814] [2023-11-26 11:50:38,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:38,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:38,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:38,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104853647] [2023-11-26 11:50:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:38,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:38,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:38,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74d9d8c6-034d-4990-a6c6-0375d1dc1269/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:50:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:38,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 11:50:38,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1669 proven. 186 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2023-11-26 11:50:57,475 INFO L327 TraceCheckSpWp]: Computing backward predicates...