./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/transpose-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/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_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/transpose-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/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_d394d997-32a1-4039-88de-d2c566d872fa/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 44b06771d393671cf9550617b8bf478abc837489f84f20705c70efc1808f7508 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:47:43,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:47:44,026 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:47:44,034 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:47:44,035 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:47:44,075 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:47:44,076 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:47:44,077 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:47:44,078 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:47:44,084 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:47:44,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:47:44,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:47:44,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:47:44,089 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:47:44,090 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:47:44,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:47:44,091 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:47:44,091 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:47:44,092 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:47:44,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:47:44,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:47:44,093 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:47:44,094 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:47:44,094 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:47:44,094 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:47:44,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:47:44,095 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:47:44,096 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:47:44,097 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:47:44,097 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:47:44,098 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:47:44,099 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:44,099 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:47:44,099 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:47:44,099 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:47:44,100 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:47:44,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:47:44,100 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:47:44,100 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:47:44,101 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:47:44,101 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:47:44,101 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:47:44,102 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_d394d997-32a1-4039-88de-d2c566d872fa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44b06771d393671cf9550617b8bf478abc837489f84f20705c70efc1808f7508 [2023-11-26 10:47:44,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:47:44,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:47:44,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:47:44,434 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:47:44,435 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:47:44,436 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/array-multidimensional/transpose-u.c [2023-11-26 10:47:47,652 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:47:47,914 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:47:47,915 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/sv-benchmarks/c/array-multidimensional/transpose-u.c [2023-11-26 10:47:47,923 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/data/be0e0a3bf/6f57cdc874a1488fbbc7de488d707d95/FLAG139a8e740 [2023-11-26 10:47:47,950 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/data/be0e0a3bf/6f57cdc874a1488fbbc7de488d707d95 [2023-11-26 10:47:47,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:47:47,958 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:47:47,960 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:47,960 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:47:47,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:47:47,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63432d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47, skipping insertion in model container [2023-11-26 10:47:47,969 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,994 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:47:48,139 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_d394d997-32a1-4039-88de-d2c566d872fa/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] [2023-11-26 10:47:48,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:48,172 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:47:48,186 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_d394d997-32a1-4039-88de-d2c566d872fa/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] [2023-11-26 10:47:48,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:48,216 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:47:48,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48 WrapperNode [2023-11-26 10:47:48,217 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:48,219 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:48,220 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:47:48,220 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:47:48,228 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,241 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,265 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2023-11-26 10:47:48,266 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:48,267 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:47:48,267 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:47:48,267 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:47:48,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,284 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,301 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 3, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 10:47:48,302 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,318 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,322 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,324 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,326 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,328 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:47:48,329 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:47:48,329 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:47:48,330 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:47:48,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (1/1) ... [2023-11-26 10:47:48,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:48,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:48,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:47:48,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:47:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:47:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:47:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:47:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:47:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:47:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:47:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:47:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:47:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:47:48,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:47:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:47:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:47:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:47:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:47:48,502 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:47:48,506 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:47:48,694 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:47:48,741 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:47:48,741 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-26 10:47:48,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:48 BoogieIcfgContainer [2023-11-26 10:47:48,742 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:47:48,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:47:48,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:47:48,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:47:48,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:47:47" (1/3) ... [2023-11-26 10:47:48,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308305c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:48, skipping insertion in model container [2023-11-26 10:47:48,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:48" (2/3) ... [2023-11-26 10:47:48,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308305c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:48, skipping insertion in model container [2023-11-26 10:47:48,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:48" (3/3) ... [2023-11-26 10:47:48,781 INFO L112 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2023-11-26 10:47:48,816 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:47:48,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:47:48,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:47:48,870 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;@1c341a8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:47:48,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:47:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 10:47:48,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:48,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:48,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:48,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:48,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1085691503, now seen corresponding path program 1 times [2023-11-26 10:47:48,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:48,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897412329] [2023-11-26 10:47:48,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:48,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:48,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:48,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253449646] [2023-11-26 10:47:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:48,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:48,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:48,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:48,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:47:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:49,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:47:49,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:49,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:49,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:49,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897412329] [2023-11-26 10:47:49,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:49,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253449646] [2023-11-26 10:47:49,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253449646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:49,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:49,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702201433] [2023-11-26 10:47:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:49,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:49,184 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:49,265 INFO L93 Difference]: Finished difference Result 38 states and 66 transitions. [2023-11-26 10:47:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-26 10:47:49,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:49,275 INFO L225 Difference]: With dead ends: 38 [2023-11-26 10:47:49,275 INFO L226 Difference]: Without dead ends: 19 [2023-11-26 10:47:49,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 10:47:49,282 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:49,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-26 10:47:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-11-26 10:47:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-26 10:47:49,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2023-11-26 10:47:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:49,318 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-26 10:47:49,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-26 10:47:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 10:47:49,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:49,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:49,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:49,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:47:49,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:49,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:49,528 INFO L85 PathProgramCache]: Analyzing trace with hash 208113221, now seen corresponding path program 1 times [2023-11-26 10:47:49,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:49,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619350914] [2023-11-26 10:47:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:49,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:49,547 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:49,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818050109] [2023-11-26 10:47:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:49,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:49,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:49,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:49,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:47:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:49,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:47:49,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:49,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:49,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:49,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619350914] [2023-11-26 10:47:49,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:49,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818050109] [2023-11-26 10:47:49,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818050109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:49,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:49,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:49,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091491265] [2023-11-26 10:47:49,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:49,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:49,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:49,699 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:49,786 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-11-26 10:47:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:49,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 10:47:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:49,789 INFO L225 Difference]: With dead ends: 42 [2023-11-26 10:47:49,789 INFO L226 Difference]: Without dead ends: 27 [2023-11-26 10:47:49,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 10:47:49,794 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:49,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-26 10:47:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-11-26 10:47:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-26 10:47:49,812 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2023-11-26 10:47:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:49,812 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-26 10:47:49,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-26 10:47:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:47:49,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:49,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:49,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:50,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:50,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:50,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash 587416847, now seen corresponding path program 1 times [2023-11-26 10:47:50,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:50,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222166729] [2023-11-26 10:47:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:50,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:50,033 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:50,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197894667] [2023-11-26 10:47:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:50,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:50,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:50,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:50,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:47:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:50,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:47:50,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:50,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:50,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222166729] [2023-11-26 10:47:50,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197894667] [2023-11-26 10:47:50,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197894667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:50,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:50,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-26 10:47:50,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476024883] [2023-11-26 10:47:50,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:50,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:47:50,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:50,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:47:50,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:50,196 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:50,329 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2023-11-26 10:47:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:47:50,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-26 10:47:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:50,333 INFO L225 Difference]: With dead ends: 62 [2023-11-26 10:47:50,333 INFO L226 Difference]: Without dead ends: 44 [2023-11-26 10:47:50,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:47:50,338 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:50,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 29 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-26 10:47:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2023-11-26 10:47:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-11-26 10:47:50,370 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 13 [2023-11-26 10:47:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:50,370 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-11-26 10:47:50,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-11-26 10:47:50,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:47:50,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:50,372 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:50,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:50,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:50,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:50,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1325141819, now seen corresponding path program 2 times [2023-11-26 10:47:50,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:50,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017101508] [2023-11-26 10:47:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:50,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:50,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:50,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595489930] [2023-11-26 10:47:50,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:50,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:50,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:50,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:50,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:47:50,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:47:50,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:50,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:47:50,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:47:50,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:50,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:50,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017101508] [2023-11-26 10:47:50,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:50,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595489930] [2023-11-26 10:47:50,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595489930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:50,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:50,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:50,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918607070] [2023-11-26 10:47:50,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:50,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:50,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:50,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:50,718 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:50,768 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2023-11-26 10:47:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 10:47:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:50,770 INFO L225 Difference]: With dead ends: 83 [2023-11-26 10:47:50,770 INFO L226 Difference]: Without dead ends: 65 [2023-11-26 10:47:50,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 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 10:47:50,772 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:50,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 8 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-26 10:47:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2023-11-26 10:47:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-11-26 10:47:50,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 16 [2023-11-26 10:47:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:50,783 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-11-26 10:47:50,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-11-26 10:47:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:47:50,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:50,784 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:50,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:50,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:50,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:50,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:50,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2037648608, now seen corresponding path program 1 times [2023-11-26 10:47:50,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:50,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188224586] [2023-11-26 10:47:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:50,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:51,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:51,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515971568] [2023-11-26 10:47:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:51,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:51,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:51,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:51,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:47:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:51,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:47:51,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:47:51,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:47:51,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:51,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188224586] [2023-11-26 10:47:51,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:51,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515971568] [2023-11-26 10:47:51,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515971568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:51,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:51,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-26 10:47:51,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794023006] [2023-11-26 10:47:51,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:51,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:47:51,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:51,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:47:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:47:51,271 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:51,522 INFO L93 Difference]: Finished difference Result 118 states and 149 transitions. [2023-11-26 10:47:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:47:51,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 10:47:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:51,523 INFO L225 Difference]: With dead ends: 118 [2023-11-26 10:47:51,524 INFO L226 Difference]: Without dead ends: 84 [2023-11-26 10:47:51,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:47:51,525 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 180 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:51,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 51 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:51,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-26 10:47:51,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2023-11-26 10:47:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 65 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2023-11-26 10:47:51,556 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 23 [2023-11-26 10:47:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:51,557 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2023-11-26 10:47:51,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2023-11-26 10:47:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 10:47:51,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:51,559 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:51,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:51,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:51,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:51,766 INFO L85 PathProgramCache]: Analyzing trace with hash 211545824, now seen corresponding path program 2 times [2023-11-26 10:47:51,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:51,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895678475] [2023-11-26 10:47:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:51,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:51,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651834291] [2023-11-26 10:47:51,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:51,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:51,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:51,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:51,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:47:51,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:47:51,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:51,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:47:51,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-26 10:47:52,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-26 10:47:52,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:52,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895678475] [2023-11-26 10:47:52,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651834291] [2023-11-26 10:47:52,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651834291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:52,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:52,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-26 10:47:52,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111007379] [2023-11-26 10:47:52,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:52,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 10:47:52,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:52,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 10:47:52,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2023-11-26 10:47:52,440 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:53,152 INFO L93 Difference]: Finished difference Result 232 states and 287 transitions. [2023-11-26 10:47:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 10:47:53,154 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-26 10:47:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:53,158 INFO L225 Difference]: With dead ends: 232 [2023-11-26 10:47:53,158 INFO L226 Difference]: Without dead ends: 168 [2023-11-26 10:47:53,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2023-11-26 10:47:53,162 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 572 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:53,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 79 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:47:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-26 10:47:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 126. [2023-11-26 10:47:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.216) internal successors, (152), 125 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2023-11-26 10:47:53,211 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 35 [2023-11-26 10:47:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:53,212 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2023-11-26 10:47:53,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2023-11-26 10:47:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-26 10:47:53,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:53,216 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:53,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:53,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:53,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:53,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:53,423 INFO L85 PathProgramCache]: Analyzing trace with hash -50112928, now seen corresponding path program 3 times [2023-11-26 10:47:53,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:53,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658187106] [2023-11-26 10:47:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:53,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:53,494 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:53,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068927201] [2023-11-26 10:47:53,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:47:53,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:53,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:53,496 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:53,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:47:53,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:47:53,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:53,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:47:53,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2023-11-26 10:47:53,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2023-11-26 10:47:53,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:53,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658187106] [2023-11-26 10:47:53,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:53,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068927201] [2023-11-26 10:47:53,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068927201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:53,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:53,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-26 10:47:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936209961] [2023-11-26 10:47:53,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:47:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:47:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:53,921 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:54,129 INFO L93 Difference]: Finished difference Result 589 states and 717 transitions. [2023-11-26 10:47:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:47:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-26 10:47:54,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:54,134 INFO L225 Difference]: With dead ends: 589 [2023-11-26 10:47:54,134 INFO L226 Difference]: Without dead ends: 490 [2023-11-26 10:47:54,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:47:54,136 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 124 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:54,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 14 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-11-26 10:47:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 276. [2023-11-26 10:47:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.12) internal successors, (308), 275 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 308 transitions. [2023-11-26 10:47:54,204 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 308 transitions. Word has length 59 [2023-11-26 10:47:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:54,204 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 308 transitions. [2023-11-26 10:47:54,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 308 transitions. [2023-11-26 10:47:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-26 10:47:54,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:54,209 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:54,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:54,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:54,417 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:54,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash -280915025, now seen corresponding path program 4 times [2023-11-26 10:47:54,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:54,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580884612] [2023-11-26 10:47:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:54,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:54,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:54,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585982697] [2023-11-26 10:47:54,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:47:54,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:54,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:54,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:54,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:47:54,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:47:54,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:54,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 10:47:55,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8404 backedges. 231 proven. 3212 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2023-11-26 10:47:56,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8404 backedges. 231 proven. 3212 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2023-11-26 10:47:56,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:56,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580884612] [2023-11-26 10:47:56,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:56,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585982697] [2023-11-26 10:47:56,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585982697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:56,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:56,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2023-11-26 10:47:56,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395123100] [2023-11-26 10:47:56,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:56,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-26 10:47:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:56,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-26 10:47:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1145, Invalid=2161, Unknown=0, NotChecked=0, Total=3306 [2023-11-26 10:47:57,000 INFO L87 Difference]: Start difference. First operand 276 states and 308 transitions. Second operand has 58 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:01,439 INFO L93 Difference]: Finished difference Result 1526 states and 1739 transitions. [2023-11-26 10:48:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-11-26 10:48:01,439 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2023-11-26 10:48:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:01,452 INFO L225 Difference]: With dead ends: 1526 [2023-11-26 10:48:01,453 INFO L226 Difference]: Without dead ends: 1352 [2023-11-26 10:48:01,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10106 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8406, Invalid=18000, Unknown=0, NotChecked=0, Total=26406 [2023-11-26 10:48:01,468 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 733 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:01,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 737 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 10:48:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2023-11-26 10:48:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 576. [2023-11-26 10:48:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.0782608695652174) internal successors, (620), 575 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 620 transitions. [2023-11-26 10:48:01,592 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 620 transitions. Word has length 209 [2023-11-26 10:48:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:01,611 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 620 transitions. [2023-11-26 10:48:01,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:01,612 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 620 transitions. [2023-11-26 10:48:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2023-11-26 10:48:01,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:01,623 INFO L195 NwaCegarLoop]: trace histogram [220, 220, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:01,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:01,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:01,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:01,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:01,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1712444303, now seen corresponding path program 5 times [2023-11-26 10:48:01,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:01,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660397419] [2023-11-26 10:48:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:01,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:02,081 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:02,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568185528] [2023-11-26 10:48:02,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:48:02,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:02,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:02,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:02,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d394d997-32a1-4039-88de-d2c566d872fa/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process