./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.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_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/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_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/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_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/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 08d675ba4148739e9e7cf1bbda146cfc1e7cae9e235e349f1daedec05eaa7d10 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:42:37,891 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:42:37,965 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:42:37,971 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:42:37,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:42:38,001 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:42:38,002 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:42:38,003 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:42:38,004 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:42:38,004 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:42:38,005 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:42:38,005 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:42:38,006 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:42:38,007 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:42:38,008 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:42:38,008 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:42:38,009 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:42:38,009 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:42:38,010 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:42:38,011 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:42:38,011 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:42:38,012 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:42:38,013 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:42:38,013 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:42:38,014 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:42:38,014 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:42:38,015 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:42:38,015 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:42:38,016 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:42:38,016 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:42:38,017 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:42:38,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:38,018 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:42:38,018 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:42:38,019 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:42:38,019 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:42:38,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:42:38,020 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:42:38,021 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:42:38,021 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:42:38,021 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:42:38,022 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:42:38,022 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_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08d675ba4148739e9e7cf1bbda146cfc1e7cae9e235e349f1daedec05eaa7d10 [2023-11-26 10:42:38,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:42:38,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:42:38,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:42:38,341 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:42:38,341 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:42:38,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.i [2023-11-26 10:42:41,473 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:42:41,772 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:42:41,773 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.i [2023-11-26 10:42:41,796 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/data/dc3597770/007792fb815d488c81e821d2f56a25eb/FLAGbb77b9756 [2023-11-26 10:42:41,810 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/data/dc3597770/007792fb815d488c81e821d2f56a25eb [2023-11-26 10:42:41,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:42:41,814 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:42:41,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:41,821 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:42:41,826 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:42:41,827 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:41" (1/1) ... [2023-11-26 10:42:41,828 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c2d5662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:41, skipping insertion in model container [2023-11-26 10:42:41,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:41" (1/1) ... [2023-11-26 10:42:41,875 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:42:42,041 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_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.i[916,929] [2023-11-26 10:42:42,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:42,253 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:42:42,267 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_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.i[916,929] [2023-11-26 10:42:42,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:42,391 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:42:42,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42 WrapperNode [2023-11-26 10:42:42,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:42,393 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:42,394 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:42:42,394 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:42:42,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,434 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,599 INFO L138 Inliner]: procedures = 26, calls = 105, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 611 [2023-11-26 10:42:42,599 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:42,600 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:42:42,609 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:42:42,610 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:42:42,621 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,622 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,629 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,696 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 10:42:42,696 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,697 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,731 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,737 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,755 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:42:42,756 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:42:42,756 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:42:42,756 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:42:42,757 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:42,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:42,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:42:42,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:42:42,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:42:42,841 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:42:42,842 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:42:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:42:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:42:42,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:42:43,013 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:42:43,015 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:42:44,062 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:42:44,118 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:42:44,119 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:42:44,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:44 BoogieIcfgContainer [2023-11-26 10:42:44,120 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:42:44,122 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:42:44,122 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:42:44,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:42:44,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:42:41" (1/3) ... [2023-11-26 10:42:44,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183f70c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:44, skipping insertion in model container [2023-11-26 10:42:44,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (2/3) ... [2023-11-26 10:42:44,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183f70c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:44, skipping insertion in model container [2023-11-26 10:42:44,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:44" (3/3) ... [2023-11-26 10:42:44,129 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-36.i [2023-11-26 10:42:44,148 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:42:44,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:42:44,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:42:44,219 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;@4cc57259, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:42:44,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:42:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 149 states have (on average 1.5570469798657718) internal successors, (232), 150 states have internal predecessors, (232), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-26 10:42:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-26 10:42:44,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:44,262 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:44,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:44,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:44,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1678376901, now seen corresponding path program 1 times [2023-11-26 10:42:44,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:44,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327810142] [2023-11-26 10:42:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:44,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:44,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:44,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327810142] [2023-11-26 10:42:44,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:42:44,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862057664] [2023-11-26 10:42:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:44,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:44,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:44,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:44,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:42:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:45,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:42:45,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 16562 trivial. 0 not checked. [2023-11-26 10:42:45,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:45,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862057664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:45,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:45,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:45,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125118366] [2023-11-26 10:42:45,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:45,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:42:45,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:45,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:42:45,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:42:45,420 INFO L87 Difference]: Start difference. First operand has 244 states, 149 states have (on average 1.5570469798657718) internal successors, (232), 150 states have internal predecessors, (232), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 2 states, 2 states have (on average 57.5) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-26 10:42:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:45,531 INFO L93 Difference]: Finished difference Result 482 states and 917 transitions. [2023-11-26 10:42:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:42:45,538 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 57.5) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 2 states have call successors, (92) Word has length 570 [2023-11-26 10:42:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:45,551 INFO L225 Difference]: With dead ends: 482 [2023-11-26 10:42:45,551 INFO L226 Difference]: Without dead ends: 239 [2023-11-26 10:42:45,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 569 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 10:42:45,563 INFO L413 NwaCegarLoop]: 399 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, 399 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 10:42:45,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 399 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-26 10:42:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2023-11-26 10:42:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 145 states have (on average 1.5034482758620689) internal successors, (218), 145 states have internal predecessors, (218), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-26 10:42:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 402 transitions. [2023-11-26 10:42:45,656 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 402 transitions. Word has length 570 [2023-11-26 10:42:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:45,657 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 402 transitions. [2023-11-26 10:42:45,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 57.5) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-26 10:42:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 402 transitions. [2023-11-26 10:42:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-26 10:42:45,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:45,679 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:45,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:42:45,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:45,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:45,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:45,889 INFO L85 PathProgramCache]: Analyzing trace with hash -17955113, now seen corresponding path program 1 times [2023-11-26 10:42:45,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:45,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242032774] [2023-11-26 10:42:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:45,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:46,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004911257] [2023-11-26 10:42:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:46,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:46,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:46,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:46,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:42:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:46,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:42:46,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-26 10:42:46,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:46,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:46,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242032774] [2023-11-26 10:42:46,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:46,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004911257] [2023-11-26 10:42:46,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004911257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:46,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:46,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:42:46,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748981964] [2023-11-26 10:42:46,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:46,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:46,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:46,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:46,718 INFO L87 Difference]: Start difference. First operand 239 states and 402 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:47,020 INFO L93 Difference]: Finished difference Result 740 states and 1252 transitions. [2023-11-26 10:42:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:42:47,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-26 10:42:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:47,031 INFO L225 Difference]: With dead ends: 740 [2023-11-26 10:42:47,032 INFO L226 Difference]: Without dead ends: 502 [2023-11-26 10:42:47,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:47,037 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 435 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:47,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 1091 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:42:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-26 10:42:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 496. [2023-11-26 10:42:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 350 states have (on average 1.6028571428571428) internal successors, (561), 352 states have internal predecessors, (561), 142 states have call successors, (142), 3 states have call predecessors, (142), 3 states have return successors, (142), 140 states have call predecessors, (142), 142 states have call successors, (142) [2023-11-26 10:42:47,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 845 transitions. [2023-11-26 10:42:47,174 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 845 transitions. Word has length 570 [2023-11-26 10:42:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:47,177 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 845 transitions. [2023-11-26 10:42:47,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 845 transitions. [2023-11-26 10:42:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-26 10:42:47,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:47,186 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:47,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:47,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:47,394 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:47,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:47,395 INFO L85 PathProgramCache]: Analyzing trace with hash 45789391, now seen corresponding path program 1 times [2023-11-26 10:42:47,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:47,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975744080] [2023-11-26 10:42:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:47,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:47,501 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:47,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147421068] [2023-11-26 10:42:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:47,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:47,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:47,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:42:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:47,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:42:47,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-26 10:42:47,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:47,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:47,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975744080] [2023-11-26 10:42:47,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:47,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147421068] [2023-11-26 10:42:47,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147421068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:47,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:47,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:47,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322496969] [2023-11-26 10:42:47,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:47,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:47,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:47,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:47,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:47,984 INFO L87 Difference]: Start difference. First operand 496 states and 845 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:48,089 INFO L93 Difference]: Finished difference Result 1486 states and 2533 transitions. [2023-11-26 10:42:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-26 10:42:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:48,103 INFO L225 Difference]: With dead ends: 1486 [2023-11-26 10:42:48,103 INFO L226 Difference]: Without dead ends: 991 [2023-11-26 10:42:48,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 568 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 10:42:48,109 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 381 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:48,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1101 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2023-11-26 10:42:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 989. [2023-11-26 10:42:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 698 states have (on average 1.6002865329512894) internal successors, (1117), 702 states have internal predecessors, (1117), 284 states have call successors, (284), 6 states have call predecessors, (284), 6 states have return successors, (284), 280 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-26 10:42:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1685 transitions. [2023-11-26 10:42:48,274 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1685 transitions. Word has length 570 [2023-11-26 10:42:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:48,276 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 1685 transitions. [2023-11-26 10:42:48,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1685 transitions. [2023-11-26 10:42:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-26 10:42:48,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:48,284 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:48,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:48,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:48,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:48,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash -975278963, now seen corresponding path program 1 times [2023-11-26 10:42:48,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:48,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231097706] [2023-11-26 10:42:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:48,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:48,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:48,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792882913] [2023-11-26 10:42:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:48,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:48,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:48,614 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:48,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:42:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:48,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:42:49,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-26 10:42:49,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:49,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:49,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231097706] [2023-11-26 10:42:49,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:49,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792882913] [2023-11-26 10:42:49,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792882913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:49,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:49,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:49,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676404102] [2023-11-26 10:42:49,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:49,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:49,189 INFO L87 Difference]: Start difference. First operand 989 states and 1685 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:49,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:49,331 INFO L93 Difference]: Finished difference Result 2723 states and 4629 transitions. [2023-11-26 10:42:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-26 10:42:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:49,347 INFO L225 Difference]: With dead ends: 2723 [2023-11-26 10:42:49,347 INFO L226 Difference]: Without dead ends: 1735 [2023-11-26 10:42:49,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 568 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 10:42:49,352 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 198 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:49,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 879 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2023-11-26 10:42:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1731. [2023-11-26 10:42:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1258 states have (on average 1.5930047694753577) internal successors, (2004), 1268 states have internal predecessors, (2004), 460 states have call successors, (460), 12 states have call predecessors, (460), 12 states have return successors, (460), 450 states have call predecessors, (460), 460 states have call successors, (460) [2023-11-26 10:42:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2924 transitions. [2023-11-26 10:42:49,584 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2924 transitions. Word has length 570 [2023-11-26 10:42:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:49,587 INFO L495 AbstractCegarLoop]: Abstraction has 1731 states and 2924 transitions. [2023-11-26 10:42:49,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2924 transitions. [2023-11-26 10:42:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-26 10:42:49,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:49,596 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:49,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:49,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:49,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:49,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2039824655, now seen corresponding path program 1 times [2023-11-26 10:42:49,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:49,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476630024] [2023-11-26 10:42:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:49,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:49,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:49,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537789362] [2023-11-26 10:42:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:49,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:49,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:49,926 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:49,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:42:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:50,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:42:50,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-26 10:42:50,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:50,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:50,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476630024] [2023-11-26 10:42:50,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:50,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537789362] [2023-11-26 10:42:50,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537789362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:50,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:50,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:50,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784411347] [2023-11-26 10:42:50,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:50,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:50,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:50,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:50,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:50,407 INFO L87 Difference]: Start difference. First operand 1731 states and 2924 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:50,548 INFO L93 Difference]: Finished difference Result 3667 states and 6184 transitions. [2023-11-26 10:42:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:50,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-26 10:42:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:50,564 INFO L225 Difference]: With dead ends: 3667 [2023-11-26 10:42:50,565 INFO L226 Difference]: Without dead ends: 1937 [2023-11-26 10:42:50,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 568 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 10:42:50,572 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 25 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:50,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 781 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2023-11-26 10:42:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1887. [2023-11-26 10:42:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1414 states have (on average 1.5785007072135786) internal successors, (2232), 1424 states have internal predecessors, (2232), 460 states have call successors, (460), 12 states have call predecessors, (460), 12 states have return successors, (460), 450 states have call predecessors, (460), 460 states have call successors, (460) [2023-11-26 10:42:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 3152 transitions. [2023-11-26 10:42:50,817 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 3152 transitions. Word has length 570 [2023-11-26 10:42:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:50,818 INFO L495 AbstractCegarLoop]: Abstraction has 1887 states and 3152 transitions. [2023-11-26 10:42:50,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 3152 transitions. [2023-11-26 10:42:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-26 10:42:50,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:50,827 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:50,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:51,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:51,035 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:51,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1338760077, now seen corresponding path program 1 times [2023-11-26 10:42:51,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:51,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882757539] [2023-11-26 10:42:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:51,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:51,109 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:51,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467249900] [2023-11-26 10:42:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:51,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:51,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:51,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:51,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:42:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:51,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:42:51,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-26 10:42:51,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:51,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:51,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882757539] [2023-11-26 10:42:51,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:51,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467249900] [2023-11-26 10:42:51,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467249900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:51,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:51,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 10:42:51,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123814454] [2023-11-26 10:42:51,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:51,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:42:51,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:51,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:42:51,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:42:51,844 INFO L87 Difference]: Start difference. First operand 1887 states and 3152 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:54,983 INFO L93 Difference]: Finished difference Result 10161 states and 16809 transitions. [2023-11-26 10:42:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:42:54,984 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-26 10:42:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:55,050 INFO L225 Difference]: With dead ends: 10161 [2023-11-26 10:42:55,051 INFO L226 Difference]: Without dead ends: 8275 [2023-11-26 10:42:55,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:42:55,062 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1407 mSDsluCounter, 2948 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 3571 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:55,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 3571 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-26 10:42:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8275 states. [2023-11-26 10:42:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8275 to 6929. [2023-11-26 10:42:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6929 states, 5242 states have (on average 1.5635253719954216) internal successors, (8196), 5288 states have internal predecessors, (8196), 1636 states have call successors, (1636), 50 states have call predecessors, (1636), 50 states have return successors, (1636), 1590 states have call predecessors, (1636), 1636 states have call successors, (1636) [2023-11-26 10:42:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6929 states to 6929 states and 11468 transitions. [2023-11-26 10:42:56,140 INFO L78 Accepts]: Start accepts. Automaton has 6929 states and 11468 transitions. Word has length 570 [2023-11-26 10:42:56,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:56,142 INFO L495 AbstractCegarLoop]: Abstraction has 6929 states and 11468 transitions. [2023-11-26 10:42:56,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:56,142 INFO L276 IsEmpty]: Start isEmpty. Operand 6929 states and 11468 transitions. [2023-11-26 10:42:56,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-26 10:42:56,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:56,157 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:56,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:56,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:56,366 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:56,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1479308687, now seen corresponding path program 1 times [2023-11-26 10:42:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:56,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141070446] [2023-11-26 10:42:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:56,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:56,455 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:56,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691037850] [2023-11-26 10:42:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:56,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:56,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:56,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:56,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:42:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:56,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:42:56,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-26 10:42:57,862 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:57,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:57,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141070446] [2023-11-26 10:42:57,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:57,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691037850] [2023-11-26 10:42:57,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691037850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:57,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:57,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:57,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309474861] [2023-11-26 10:42:57,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:57,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:57,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:57,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:57,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:57,867 INFO L87 Difference]: Start difference. First operand 6929 states and 11468 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:42:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:59,281 INFO L93 Difference]: Finished difference Result 20785 states and 34402 transitions. [2023-11-26 10:42:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:59,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-26 10:42:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:59,404 INFO L225 Difference]: With dead ends: 20785 [2023-11-26 10:42:59,404 INFO L226 Difference]: Without dead ends: 13857 [2023-11-26 10:42:59,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 568 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 10:42:59,440 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 126 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:59,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 790 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13857 states. [2023-11-26 10:43:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13857 to 13855. [2023-11-26 10:43:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13855 states, 10482 states have (on average 1.5590536157221904) internal successors, (16342), 10574 states have internal predecessors, (16342), 3272 states have call successors, (3272), 100 states have call predecessors, (3272), 100 states have return successors, (3272), 3180 states have call predecessors, (3272), 3272 states have call successors, (3272) [2023-11-26 10:43:01,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13855 states to 13855 states and 22886 transitions. [2023-11-26 10:43:01,070 INFO L78 Accepts]: Start accepts. Automaton has 13855 states and 22886 transitions. Word has length 570 [2023-11-26 10:43:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:01,071 INFO L495 AbstractCegarLoop]: Abstraction has 13855 states and 22886 transitions. [2023-11-26 10:43:01,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:43:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13855 states and 22886 transitions. [2023-11-26 10:43:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-26 10:43:01,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:01,093 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:01,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:01,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:43:01,305 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:01,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:01,306 INFO L85 PathProgramCache]: Analyzing trace with hash -326129647, now seen corresponding path program 1 times [2023-11-26 10:43:01,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:01,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080809257] [2023-11-26 10:43:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:01,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:01,394 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:43:01,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521403297] [2023-11-26 10:43:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:01,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:01,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:01,396 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:01,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:43:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:01,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:43:01,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8407 proven. 147 refuted. 0 times theorem prover too weak. 8190 trivial. 0 not checked. [2023-11-26 10:43:02,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 126 proven. 147 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-26 10:43:03,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:03,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080809257] [2023-11-26 10:43:03,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:43:03,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521403297] [2023-11-26 10:43:03,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521403297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:03,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:03,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:43:03,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227849915] [2023-11-26 10:43:03,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:03,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:43:03,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:03,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:43:03,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:43:03,098 INFO L87 Difference]: Start difference. First operand 13855 states and 22886 transitions. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 2 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 2 states have call predecessors, (142), 2 states have call successors, (142) [2023-11-26 10:43:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:05,340 INFO L93 Difference]: Finished difference Result 27965 states and 46011 transitions. [2023-11-26 10:43:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:43:05,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 2 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 2 states have call predecessors, (142), 2 states have call successors, (142) Word has length 570 [2023-11-26 10:43:05,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:05,407 INFO L225 Difference]: With dead ends: 27965 [2023-11-26 10:43:05,407 INFO L226 Difference]: Without dead ends: 14111 [2023-11-26 10:43:05,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 1132 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:43:05,467 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 340 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:05,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 714 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:43:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14111 states. [2023-11-26 10:43:07,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14111 to 13919. [2023-11-26 10:43:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13919 states, 10530 states have (on average 1.5473884140550807) internal successors, (16294), 10622 states have internal predecessors, (16294), 3272 states have call successors, (3272), 116 states have call predecessors, (3272), 116 states have return successors, (3272), 3180 states have call predecessors, (3272), 3272 states have call successors, (3272) [2023-11-26 10:43:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13919 states to 13919 states and 22838 transitions. [2023-11-26 10:43:07,195 INFO L78 Accepts]: Start accepts. Automaton has 13919 states and 22838 transitions. Word has length 570 [2023-11-26 10:43:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:07,197 INFO L495 AbstractCegarLoop]: Abstraction has 13919 states and 22838 transitions. [2023-11-26 10:43:07,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 2 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 2 states have call predecessors, (142), 2 states have call successors, (142) [2023-11-26 10:43:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 13919 states and 22838 transitions. [2023-11-26 10:43:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-26 10:43:07,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:07,217 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:07,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:07,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:43:07,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:07,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1668015059, now seen corresponding path program 1 times [2023-11-26 10:43:07,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:07,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133589290] [2023-11-26 10:43:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:07,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:07,506 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:43:07,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165846414] [2023-11-26 10:43:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:07,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:07,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:07,508 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:07,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:43:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:07,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:43:07,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-26 10:43:07,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:07,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:07,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133589290] [2023-11-26 10:43:07,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:43:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165846414] [2023-11-26 10:43:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165846414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:07,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:07,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:43:08,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505490941] [2023-11-26 10:43:08,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:08,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:08,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:08,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:43:08,003 INFO L87 Difference]: Start difference. First operand 13919 states and 22838 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:43:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:09,936 INFO L93 Difference]: Finished difference Result 33833 states and 55357 transitions. [2023-11-26 10:43:09,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:43:09,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-26 10:43:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:10,007 INFO L225 Difference]: With dead ends: 33833 [2023-11-26 10:43:10,007 INFO L226 Difference]: Without dead ends: 18379 [2023-11-26 10:43:10,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:10,053 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 343 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:10,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1230 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:43:10,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18379 states. [2023-11-26 10:43:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18379 to 18367. [2023-11-26 10:43:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18367 states, 13482 states have (on average 1.5112001186767543) internal successors, (20374), 13622 states have internal predecessors, (20374), 4712 states have call successors, (4712), 172 states have call predecessors, (4712), 172 states have return successors, (4712), 4572 states have call predecessors, (4712), 4712 states have call successors, (4712) [2023-11-26 10:43:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18367 states to 18367 states and 29798 transitions. [2023-11-26 10:43:12,682 INFO L78 Accepts]: Start accepts. Automaton has 18367 states and 29798 transitions. Word has length 570 [2023-11-26 10:43:12,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:12,683 INFO L495 AbstractCegarLoop]: Abstraction has 18367 states and 29798 transitions. [2023-11-26 10:43:12,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-26 10:43:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand 18367 states and 29798 transitions. [2023-11-26 10:43:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-26 10:43:12,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:12,711 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:12,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:12,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:12,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:12,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:12,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1533497325, now seen corresponding path program 1 times [2023-11-26 10:43:12,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:12,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483019872] [2023-11-26 10:43:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:12,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:12,992 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:43:12,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287493507] [2023-11-26 10:43:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:12,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:12,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:12,994 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:13,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3541fa-f6a1-40b0-9e44-32d07aaae0a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:43:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:13,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:43:13,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 7407 proven. 87 refuted. 0 times theorem prover too weak. 9250 trivial. 0 not checked. [2023-11-26 10:43:13,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 186 proven. 87 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-26 10:43:14,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:14,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483019872] [2023-11-26 10:43:14,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:43:14,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287493507] [2023-11-26 10:43:14,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287493507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:14,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:14,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-26 10:43:14,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529962011] [2023-11-26 10:43:14,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:14,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:43:14,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:43:14,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:43:14,372 INFO L87 Difference]: Start difference. First operand 18367 states and 29798 transitions. Second operand has 18 states, 18 states have (on average 9.0) internal successors, (162), 18 states have internal predecessors, (162), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-26 10:43:20,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:43:25,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:25,693 INFO L93 Difference]: Finished difference Result 66709 states and 107079 transitions. [2023-11-26 10:43:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 10:43:25,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.0) internal successors, (162), 18 states have internal predecessors, (162), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) Word has length 570 [2023-11-26 10:43:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:25,895 INFO L225 Difference]: With dead ends: 66709 [2023-11-26 10:43:25,896 INFO L226 Difference]: Without dead ends: 48343 [2023-11-26 10:43:25,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1165 GetRequests, 1125 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=478, Invalid=1244, Unknown=0, NotChecked=0, Total=1722 [2023-11-26 10:43:25,948 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 2096 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 778 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2218 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:25,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2218 Valid, 2074 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 2559 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2023-11-26 10:43:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48343 states.