./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/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_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/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_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/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 27b7d41c83bd27c4821a45cf0c1b489a71375b91c18644eeffdc9ad906f09c11 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:48:38,348 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:48:38,418 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:48:38,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:48:38,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:48:38,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:48:38,451 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:48:38,451 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:48:38,452 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:48:38,453 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:48:38,453 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:48:38,454 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:48:38,454 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:48:38,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:48:38,455 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:48:38,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:48:38,457 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:48:38,457 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:48:38,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:48:38,458 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:48:38,458 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:48:38,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:48:38,460 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:48:38,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:48:38,460 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:48:38,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:48:38,461 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:48:38,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:48:38,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:48:38,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:48:38,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:48:38,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:38,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:48:38,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:48:38,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:48:38,465 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:48:38,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:48:38,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:48:38,466 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:48:38,466 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:48:38,466 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:48:38,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:48:38,467 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_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27b7d41c83bd27c4821a45cf0c1b489a71375b91c18644eeffdc9ad906f09c11 [2023-11-26 11:48:38,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:48:38,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:48:38,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:48:38,744 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:48:38,745 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:48:38,746 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i [2023-11-26 11:48:41,883 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:48:42,213 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:48:42,224 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i [2023-11-26 11:48:42,248 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/data/b8112ec11/0dd824d0e4004d9ba7da2b72f554820e/FLAGf106ad2f1 [2023-11-26 11:48:42,267 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/data/b8112ec11/0dd824d0e4004d9ba7da2b72f554820e [2023-11-26 11:48:42,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:48:42,278 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:48:42,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:42,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:48:42,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:48:42,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:42" (1/1) ... [2023-11-26 11:48:42,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4749c47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:42, skipping insertion in model container [2023-11-26 11:48:42,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:42" (1/1) ... [2023-11-26 11:48:42,390 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:48:42,604 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_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i[916,929] [2023-11-26 11:48:42,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:42,955 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:48:42,966 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_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i[916,929] [2023-11-26 11:48:43,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:43,226 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:48:43,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43 WrapperNode [2023-11-26 11:48:43,227 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:43,228 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:43,228 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:48:43,228 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:48:43,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,272 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,438 INFO L138 Inliner]: procedures = 26, calls = 85, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 780 [2023-11-26 11:48:43,439 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:43,440 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:48:43,440 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:48:43,440 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:48:43,452 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,471 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,560 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:48:43,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,561 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,647 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,665 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:48:43,695 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:48:43,695 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:48:43,695 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:48:43,696 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:43,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:43,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:48:43,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:48:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:48:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:48:43,782 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:48:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:48:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:48:43,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:48:43,984 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:48:43,986 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:48:45,581 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:48:45,689 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:48:45,689 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:48:45,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:45 BoogieIcfgContainer [2023-11-26 11:48:45,690 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:48:45,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:48:45,694 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:48:45,698 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:48:45,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:48:42" (1/3) ... [2023-11-26 11:48:45,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0e74aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:45, skipping insertion in model container [2023-11-26 11:48:45,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43" (2/3) ... [2023-11-26 11:48:45,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0e74aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:45, skipping insertion in model container [2023-11-26 11:48:45,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:45" (3/3) ... [2023-11-26 11:48:45,702 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-97.i [2023-11-26 11:48:45,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:48:45,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:48:45,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:48:45,797 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;@1ca65668, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:48:45,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:48:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 224 states have (on average 1.6160714285714286) internal successors, (362), 225 states have internal predecessors, (362), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-26 11:48:45,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-26 11:48:45,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:45,849 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:45,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:45,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash 864953944, now seen corresponding path program 1 times [2023-11-26 11:48:45,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:45,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382696650] [2023-11-26 11:48:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:45,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:46,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:46,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382696650] [2023-11-26 11:48:46,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:48:46,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151273563] [2023-11-26 11:48:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:46,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:46,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:46,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:46,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:48:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:46,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:48:46,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2023-11-26 11:48:47,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:47,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151273563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:47,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:47,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:47,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36591020] [2023-11-26 11:48:47,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:47,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:48:47,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:48:47,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:48:47,095 INFO L87 Difference]: Start difference. First operand has 299 states, 224 states have (on average 1.6160714285714286) internal successors, (362), 225 states have internal predecessors, (362), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-26 11:48:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:47,181 INFO L93 Difference]: Finished difference Result 595 states and 1082 transitions. [2023-11-26 11:48:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:48:47,184 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) Word has length 499 [2023-11-26 11:48:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:47,201 INFO L225 Difference]: With dead ends: 595 [2023-11-26 11:48:47,201 INFO L226 Difference]: Without dead ends: 297 [2023-11-26 11:48:47,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:48:47,216 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:47,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 495 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-26 11:48:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2023-11-26 11:48:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 223 states have (on average 1.5874439461883407) internal successors, (354), 223 states have internal predecessors, (354), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-26 11:48:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 498 transitions. [2023-11-26 11:48:47,312 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 498 transitions. Word has length 499 [2023-11-26 11:48:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:47,313 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 498 transitions. [2023-11-26 11:48:47,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-26 11:48:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 498 transitions. [2023-11-26 11:48:47,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-26 11:48:47,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:47,330 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:47,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:48:47,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:48:47,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:47,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2068244440, now seen corresponding path program 1 times [2023-11-26 11:48:47,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835981833] [2023-11-26 11:48:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:47,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:47,730 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:47,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764549432] [2023-11-26 11:48:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:47,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:47,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:47,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:47,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:48:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:48,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:48:48,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 11:48:48,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:48,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:48,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835981833] [2023-11-26 11:48:48,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:48,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764549432] [2023-11-26 11:48:48,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764549432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:48,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:48,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:48,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562615260] [2023-11-26 11:48:48,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:48,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:48,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:48,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:48,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:48,338 INFO L87 Difference]: Start difference. First operand 297 states and 498 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 11:48:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:48,498 INFO L93 Difference]: Finished difference Result 764 states and 1280 transitions. [2023-11-26 11:48:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 499 [2023-11-26 11:48:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:48,508 INFO L225 Difference]: With dead ends: 764 [2023-11-26 11:48:48,508 INFO L226 Difference]: Without dead ends: 468 [2023-11-26 11:48:48,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:48,511 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 256 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:48,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1013 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-26 11:48:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 465. [2023-11-26 11:48:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 368 states have (on average 1.6032608695652173) internal successors, (590), 369 states have internal predecessors, (590), 94 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-26 11:48:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 778 transitions. [2023-11-26 11:48:48,572 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 778 transitions. Word has length 499 [2023-11-26 11:48:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:48,574 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 778 transitions. [2023-11-26 11:48:48,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 11:48:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 778 transitions. [2023-11-26 11:48:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-26 11:48:48,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:48,589 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:48,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:48,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:48,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:48,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash -287560810, now seen corresponding path program 1 times [2023-11-26 11:48:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:48,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964035541] [2023-11-26 11:48:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:48,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:48,936 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:48,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901842512] [2023-11-26 11:48:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:48,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:48,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:48,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:48,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:48:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:49,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:48:49,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 11:48:49,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:49,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:49,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964035541] [2023-11-26 11:48:49,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:49,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901842512] [2023-11-26 11:48:49,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901842512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:49,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:49,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:49,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141343738] [2023-11-26 11:48:49,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:49,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:49,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:49,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:49,578 INFO L87 Difference]: Start difference. First operand 465 states and 778 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 11:48:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:50,346 INFO L93 Difference]: Finished difference Result 2038 states and 3394 transitions. [2023-11-26 11:48:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:48:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 499 [2023-11-26 11:48:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:50,363 INFO L225 Difference]: With dead ends: 2038 [2023-11-26 11:48:50,363 INFO L226 Difference]: Without dead ends: 1574 [2023-11-26 11:48:50,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:50,367 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 878 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:50,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 1625 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:48:50,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2023-11-26 11:48:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1566. [2023-11-26 11:48:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1273 states have (on average 1.5993715632364494) internal successors, (2036), 1279 states have internal predecessors, (2036), 284 states have call successors, (284), 8 states have call predecessors, (284), 8 states have return successors, (284), 278 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-26 11:48:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2604 transitions. [2023-11-26 11:48:50,552 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2604 transitions. Word has length 499 [2023-11-26 11:48:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:50,554 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 2604 transitions. [2023-11-26 11:48:50,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 11:48:50,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2604 transitions. [2023-11-26 11:48:50,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-26 11:48:50,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:50,568 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:50,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:50,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:50,779 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:50,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:50,780 INFO L85 PathProgramCache]: Analyzing trace with hash -12801196, now seen corresponding path program 1 times [2023-11-26 11:48:50,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:50,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797876636] [2023-11-26 11:48:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:50,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:50,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:50,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67328908] [2023-11-26 11:48:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:50,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:50,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:50,903 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:50,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:48:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:51,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:48:51,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4427 proven. 147 refuted. 0 times theorem prover too weak. 5650 trivial. 0 not checked. [2023-11-26 11:48:52,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 66 proven. 147 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-26 11:48:52,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:52,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797876636] [2023-11-26 11:48:52,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:52,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67328908] [2023-11-26 11:48:52,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67328908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:52,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:52,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:48:52,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305973170] [2023-11-26 11:48:52,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:52,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:52,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:52,516 INFO L87 Difference]: Start difference. First operand 1566 states and 2604 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2023-11-26 11:48:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:53,132 INFO L93 Difference]: Finished difference Result 2511 states and 4164 transitions. [2023-11-26 11:48:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:48:53,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) Word has length 499 [2023-11-26 11:48:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:53,142 INFO L225 Difference]: With dead ends: 2511 [2023-11-26 11:48:53,142 INFO L226 Difference]: Without dead ends: 946 [2023-11-26 11:48:53,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 990 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:48:53,148 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 615 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:53,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1054 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:48:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-11-26 11:48:53,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 938. [2023-11-26 11:48:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 733 states have (on average 1.5702592087312415) internal successors, (1151), 735 states have internal predecessors, (1151), 196 states have call successors, (196), 8 states have call predecessors, (196), 8 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-26 11:48:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1543 transitions. [2023-11-26 11:48:53,259 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1543 transitions. Word has length 499 [2023-11-26 11:48:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:53,263 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1543 transitions. [2023-11-26 11:48:53,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2023-11-26 11:48:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1543 transitions. [2023-11-26 11:48:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2023-11-26 11:48:53,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:53,277 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:53,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:53,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:53,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:53,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1674529174, now seen corresponding path program 1 times [2023-11-26 11:48:53,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:53,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567787471] [2023-11-26 11:48:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:53,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:53,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175979369] [2023-11-26 11:48:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:53,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:53,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:53,594 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:53,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:48:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:54,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:48:54,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4631 proven. 141 refuted. 0 times theorem prover too weak. 5452 trivial. 0 not checked. [2023-11-26 11:48:54,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 72 proven. 141 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-26 11:48:55,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:55,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567787471] [2023-11-26 11:48:55,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:55,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175979369] [2023-11-26 11:48:55,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175979369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:55,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:55,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:48:55,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720915678] [2023-11-26 11:48:55,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:55,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:48:55,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:55,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:48:55,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:48:55,356 INFO L87 Difference]: Start difference. First operand 938 states and 1543 transitions. Second operand has 8 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-11-26 11:48:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:56,041 INFO L93 Difference]: Finished difference Result 1899 states and 3105 transitions. [2023-11-26 11:48:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:48:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) Word has length 501 [2023-11-26 11:48:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:56,051 INFO L225 Difference]: With dead ends: 1899 [2023-11-26 11:48:56,052 INFO L226 Difference]: Without dead ends: 962 [2023-11-26 11:48:56,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 994 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:48:56,058 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 507 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:56,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 1028 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:48:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2023-11-26 11:48:56,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 954. [2023-11-26 11:48:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 745 states have (on average 1.5355704697986576) internal successors, (1144), 747 states have internal predecessors, (1144), 196 states have call successors, (196), 12 states have call predecessors, (196), 12 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-26 11:48:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1536 transitions. [2023-11-26 11:48:56,200 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1536 transitions. Word has length 501 [2023-11-26 11:48:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:56,202 INFO L495 AbstractCegarLoop]: Abstraction has 954 states and 1536 transitions. [2023-11-26 11:48:56,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-11-26 11:48:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1536 transitions. [2023-11-26 11:48:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-11-26 11:48:56,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:56,217 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:56,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:56,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:56,426 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:56,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:56,427 INFO L85 PathProgramCache]: Analyzing trace with hash -175616658, now seen corresponding path program 1 times [2023-11-26 11:48:56,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:56,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133082458] [2023-11-26 11:48:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:56,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:56,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:56,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972250435] [2023-11-26 11:48:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:56,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:56,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:56,514 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:56,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:48:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:56,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:48:56,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5183 proven. 105 refuted. 0 times theorem prover too weak. 4936 trivial. 0 not checked. [2023-11-26 11:48:57,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 108 proven. 105 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-26 11:48:57,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:57,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133082458] [2023-11-26 11:48:57,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:57,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972250435] [2023-11-26 11:48:57,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972250435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:57,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:57,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:48:57,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329001306] [2023-11-26 11:48:57,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:57,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:57,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:57,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:57,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:57,899 INFO L87 Difference]: Start difference. First operand 954 states and 1536 transitions. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) [2023-11-26 11:48:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:58,602 INFO L93 Difference]: Finished difference Result 1923 states and 3085 transitions. [2023-11-26 11:48:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:48:58,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) Word has length 502 [2023-11-26 11:48:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:58,613 INFO L225 Difference]: With dead ends: 1923 [2023-11-26 11:48:58,613 INFO L226 Difference]: Without dead ends: 970 [2023-11-26 11:48:58,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1006 GetRequests, 996 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:48:58,618 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 872 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:58,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1043 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:48:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2023-11-26 11:48:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 962. [2023-11-26 11:48:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 751 states have (on average 1.5246338215712383) internal successors, (1145), 753 states have internal predecessors, (1145), 196 states have call successors, (196), 14 states have call predecessors, (196), 14 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-26 11:48:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1537 transitions. [2023-11-26 11:48:58,723 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1537 transitions. Word has length 502 [2023-11-26 11:48:58,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:58,725 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 1537 transitions. [2023-11-26 11:48:58,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) [2023-11-26 11:48:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1537 transitions. [2023-11-26 11:48:58,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-11-26 11:48:58,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:58,731 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:58,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:58,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:58,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:58,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:58,942 INFO L85 PathProgramCache]: Analyzing trace with hash 190629636, now seen corresponding path program 1 times [2023-11-26 11:48:58,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:58,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075665148] [2023-11-26 11:48:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:58,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:59,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:59,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701055926] [2023-11-26 11:48:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:59,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:59,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:59,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:59,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:48:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:59,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:59,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 11:48:59,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:59,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075665148] [2023-11-26 11:48:59,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701055926] [2023-11-26 11:48:59,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701055926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:59,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:59,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:59,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477621558] [2023-11-26 11:48:59,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:59,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:59,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:59,703 INFO L87 Difference]: Start difference. First operand 962 states and 1537 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 11:49:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:00,118 INFO L93 Difference]: Finished difference Result 2912 states and 4643 transitions. [2023-11-26 11:49:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:49:00,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 504 [2023-11-26 11:49:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:00,134 INFO L225 Difference]: With dead ends: 2912 [2023-11-26 11:49:00,134 INFO L226 Difference]: Without dead ends: 1951 [2023-11-26 11:49:00,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 501 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 11:49:00,138 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 446 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:00,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1349 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:49:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2023-11-26 11:49:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1839. [2023-11-26 11:49:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1416 states have (on average 1.5070621468926553) internal successors, (2134), 1422 states have internal predecessors, (2134), 392 states have call successors, (392), 30 states have call predecessors, (392), 30 states have return successors, (392), 386 states have call predecessors, (392), 392 states have call successors, (392) [2023-11-26 11:49:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2918 transitions. [2023-11-26 11:49:00,423 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2918 transitions. Word has length 504 [2023-11-26 11:49:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:00,424 INFO L495 AbstractCegarLoop]: Abstraction has 1839 states and 2918 transitions. [2023-11-26 11:49:00,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 11:49:00,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2918 transitions. [2023-11-26 11:49:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-11-26 11:49:00,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:00,431 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:00,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:00,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:00,641 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:00,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:00,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1576833030, now seen corresponding path program 1 times [2023-11-26 11:49:00,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:00,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888350233] [2023-11-26 11:49:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:00,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:00,735 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:00,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177893273] [2023-11-26 11:49:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:00,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:00,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:00,737 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:00,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:49:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:01,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:49:01,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5163 proven. 99 refuted. 0 times theorem prover too weak. 4962 trivial. 0 not checked. [2023-11-26 11:49:01,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 114 proven. 99 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-26 11:49:01,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888350233] [2023-11-26 11:49:01,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:01,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177893273] [2023-11-26 11:49:01,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177893273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:01,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:01,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:49:01,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783691444] [2023-11-26 11:49:01,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:01,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:49:01,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:01,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:49:01,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:49:01,946 INFO L87 Difference]: Start difference. First operand 1839 states and 2918 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2023-11-26 11:49:03,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:03,036 INFO L93 Difference]: Finished difference Result 3789 states and 5977 transitions. [2023-11-26 11:49:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:49:03,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) Word has length 504 [2023-11-26 11:49:03,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:03,052 INFO L225 Difference]: With dead ends: 3789 [2023-11-26 11:49:03,053 INFO L226 Difference]: Without dead ends: 1951 [2023-11-26 11:49:03,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 1000 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:49:03,059 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 639 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:03,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1189 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:49:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2023-11-26 11:49:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1928. [2023-11-26 11:49:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1459 states have (on average 1.485263879369431) internal successors, (2167), 1466 states have internal predecessors, (2167), 430 states have call successors, (430), 38 states have call predecessors, (430), 38 states have return successors, (430), 423 states have call predecessors, (430), 430 states have call successors, (430) [2023-11-26 11:49:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 3027 transitions. [2023-11-26 11:49:03,307 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 3027 transitions. Word has length 504 [2023-11-26 11:49:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:03,308 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 3027 transitions. [2023-11-26 11:49:03,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2023-11-26 11:49:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 3027 transitions. [2023-11-26 11:49:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-11-26 11:49:03,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:03,315 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:03,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:03,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:03,524 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:03,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:03,525 INFO L85 PathProgramCache]: Analyzing trace with hash -841651448, now seen corresponding path program 1 times [2023-11-26 11:49:03,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:03,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760803280] [2023-11-26 11:49:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:03,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:03,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:03,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80270714] [2023-11-26 11:49:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:03,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:03,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:03,595 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:03,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:49:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:04,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:49:04,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3851 proven. 51 refuted. 0 times theorem prover too weak. 6322 trivial. 0 not checked. [2023-11-26 11:49:04,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 162 proven. 51 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-26 11:49:04,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:04,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760803280] [2023-11-26 11:49:04,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:04,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80270714] [2023-11-26 11:49:04,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80270714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:04,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:04,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:49:04,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664413651] [2023-11-26 11:49:04,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:04,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:04,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:04,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:04,763 INFO L87 Difference]: Start difference. First operand 1928 states and 3027 transitions. Second operand has 8 states, 8 states have (on average 30.875) internal successors, (247), 8 states have internal predecessors, (247), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) [2023-11-26 11:49:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:05,617 INFO L93 Difference]: Finished difference Result 3820 states and 5980 transitions. [2023-11-26 11:49:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:05,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.875) internal successors, (247), 8 states have internal predecessors, (247), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) Word has length 504 [2023-11-26 11:49:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:05,632 INFO L225 Difference]: With dead ends: 3820 [2023-11-26 11:49:05,633 INFO L226 Difference]: Without dead ends: 1966 [2023-11-26 11:49:05,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:49:05,640 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 794 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:05,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 1043 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:49:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2023-11-26 11:49:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1944. [2023-11-26 11:49:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1471 states have (on average 1.470428280081577) internal successors, (2163), 1478 states have internal predecessors, (2163), 430 states have call successors, (430), 42 states have call predecessors, (430), 42 states have return successors, (430), 423 states have call predecessors, (430), 430 states have call successors, (430) [2023-11-26 11:49:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 3023 transitions. [2023-11-26 11:49:05,885 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 3023 transitions. Word has length 504 [2023-11-26 11:49:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:05,886 INFO L495 AbstractCegarLoop]: Abstraction has 1944 states and 3023 transitions. [2023-11-26 11:49:05,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.875) internal successors, (247), 8 states have internal predecessors, (247), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) [2023-11-26 11:49:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 3023 transitions. [2023-11-26 11:49:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-26 11:49:05,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:05,893 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:05,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:06,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:06,101 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:06,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:06,102 INFO L85 PathProgramCache]: Analyzing trace with hash -120698157, now seen corresponding path program 1 times [2023-11-26 11:49:06,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:06,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756567748] [2023-11-26 11:49:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:06,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:06,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:06,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067277666] [2023-11-26 11:49:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:06,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:06,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:06,190 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:06,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:49:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:06,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:49:06,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2531 proven. 183 refuted. 0 times theorem prover too weak. 7510 trivial. 0 not checked. [2023-11-26 11:49:07,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 30 proven. 183 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-26 11:49:07,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:07,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756567748] [2023-11-26 11:49:07,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:07,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067277666] [2023-11-26 11:49:07,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067277666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:07,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:07,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:49:07,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927240573] [2023-11-26 11:49:07,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:07,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:07,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:07,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:07,944 INFO L87 Difference]: Start difference. First operand 1944 states and 3023 transitions. Second operand has 8 states, 8 states have (on average 29.75) internal successors, (238), 8 states have internal predecessors, (238), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) [2023-11-26 11:49:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:08,659 INFO L93 Difference]: Finished difference Result 3872 states and 5987 transitions. [2023-11-26 11:49:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.75) internal successors, (238), 8 states have internal predecessors, (238), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) Word has length 505 [2023-11-26 11:49:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:08,674 INFO L225 Difference]: With dead ends: 3872 [2023-11-26 11:49:08,674 INFO L226 Difference]: Without dead ends: 2002 [2023-11-26 11:49:08,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 1002 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:49:08,681 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 269 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:08,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1025 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:49:08,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2023-11-26 11:49:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1980. [2023-11-26 11:49:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1498 states have (on average 1.4566088117489986) internal successors, (2182), 1505 states have internal predecessors, (2182), 430 states have call successors, (430), 51 states have call predecessors, (430), 51 states have return successors, (430), 423 states have call predecessors, (430), 430 states have call successors, (430) [2023-11-26 11:49:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 3042 transitions. [2023-11-26 11:49:09,051 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 3042 transitions. Word has length 505 [2023-11-26 11:49:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:09,052 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 3042 transitions. [2023-11-26 11:49:09,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.75) internal successors, (238), 8 states have internal predecessors, (238), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) [2023-11-26 11:49:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 3042 transitions. [2023-11-26 11:49:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-26 11:49:09,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:09,059 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:09,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:09,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:09,273 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:09,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash 313030929, now seen corresponding path program 1 times [2023-11-26 11:49:09,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:09,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755371275] [2023-11-26 11:49:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:09,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:09,342 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:09,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380933628] [2023-11-26 11:49:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:09,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:09,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:09,344 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:09,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:49:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:09,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:49:09,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4127 proven. 57 refuted. 0 times theorem prover too weak. 6040 trivial. 0 not checked. [2023-11-26 11:49:10,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 156 proven. 57 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-26 11:49:11,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:11,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755371275] [2023-11-26 11:49:11,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:11,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380933628] [2023-11-26 11:49:11,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380933628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:11,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:11,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-26 11:49:11,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125324183] [2023-11-26 11:49:11,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:11,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:49:11,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:49:11,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:49:11,333 INFO L87 Difference]: Start difference. First operand 1980 states and 3042 transitions. Second operand has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-26 11:49:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:14,917 INFO L93 Difference]: Finished difference Result 10074 states and 15468 transitions. [2023-11-26 11:49:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 11:49:14,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) Word has length 505 [2023-11-26 11:49:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:14,971 INFO L225 Difference]: With dead ends: 10074 [2023-11-26 11:49:14,971 INFO L226 Difference]: Without dead ends: 8172 [2023-11-26 11:49:14,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-11-26 11:49:14,979 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 5069 mSDsluCounter, 3655 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5140 SdHoareTripleChecker+Valid, 4155 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:14,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5140 Valid, 4155 Invalid, 2916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1160 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-26 11:49:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2023-11-26 11:49:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 6580. [2023-11-26 11:49:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 5203 states have (on average 1.4543532577359215) internal successors, (7567), 5223 states have internal predecessors, (7567), 1226 states have call successors, (1226), 150 states have call predecessors, (1226), 150 states have return successors, (1226), 1206 states have call predecessors, (1226), 1226 states have call successors, (1226) [2023-11-26 11:49:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 10019 transitions. [2023-11-26 11:49:15,919 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 10019 transitions. Word has length 505 [2023-11-26 11:49:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:15,920 INFO L495 AbstractCegarLoop]: Abstraction has 6580 states and 10019 transitions. [2023-11-26 11:49:15,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-26 11:49:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 10019 transitions. [2023-11-26 11:49:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-26 11:49:15,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:15,928 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:15,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-26 11:49:16,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:49:16,146 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:16,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash -857720303, now seen corresponding path program 1 times [2023-11-26 11:49:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:16,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721188211] [2023-11-26 11:49:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:16,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:16,213 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:16,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069104576] [2023-11-26 11:49:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:16,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:16,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:16,215 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:16,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:49:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:16,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:49:16,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5408 proven. 93 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2023-11-26 11:49:17,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 327 proven. 96 refuted. 0 times theorem prover too weak. 9801 trivial. 0 not checked. [2023-11-26 11:49:19,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:19,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721188211] [2023-11-26 11:49:19,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:19,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069104576] [2023-11-26 11:49:19,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069104576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:19,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:19,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-11-26 11:49:19,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480648507] [2023-11-26 11:49:19,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:49:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:49:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:49:19,184 INFO L87 Difference]: Start difference. First operand 6580 states and 10019 transitions. Second operand has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) [2023-11-26 11:49:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:21,442 INFO L93 Difference]: Finished difference Result 18549 states and 28176 transitions. [2023-11-26 11:49:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:49:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) Word has length 505 [2023-11-26 11:49:21,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:21,499 INFO L225 Difference]: With dead ends: 18549 [2023-11-26 11:49:21,499 INFO L226 Difference]: Without dead ends: 12047 [2023-11-26 11:49:21,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 993 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:49:21,520 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 823 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:21,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 1632 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 11:49:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12047 states. [2023-11-26 11:49:22,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12047 to 11881. [2023-11-26 11:49:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11881 states, 9828 states have (on average 1.455942205942206) internal successors, (14309), 9872 states have internal predecessors, (14309), 1802 states have call successors, (1802), 250 states have call predecessors, (1802), 250 states have return successors, (1802), 1758 states have call predecessors, (1802), 1802 states have call successors, (1802) [2023-11-26 11:49:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11881 states to 11881 states and 17913 transitions. [2023-11-26 11:49:22,965 INFO L78 Accepts]: Start accepts. Automaton has 11881 states and 17913 transitions. Word has length 505 [2023-11-26 11:49:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:22,967 INFO L495 AbstractCegarLoop]: Abstraction has 11881 states and 17913 transitions. [2023-11-26 11:49:22,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) [2023-11-26 11:49:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 11881 states and 17913 transitions. [2023-11-26 11:49:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-26 11:49:22,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:22,980 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:22,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:23,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:49:23,189 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:23,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:23,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1367193393, now seen corresponding path program 1 times [2023-11-26 11:49:23,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:23,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755977436] [2023-11-26 11:49:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:23,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:23,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:23,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767367013] [2023-11-26 11:49:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:23,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:23,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:23,265 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:23,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b9c08d-9f8d-48b4-9e10-b2d892ca7431/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:49:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:23,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:49:23,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 11:49:24,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:24,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:24,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755977436] [2023-11-26 11:49:24,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:24,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767367013] [2023-11-26 11:49:24,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767367013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:24,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:24,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:49:24,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080412768] [2023-11-26 11:49:24,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:24,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:49:24,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:49:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:49:24,602 INFO L87 Difference]: Start difference. First operand 11881 states and 17913 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72)