./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c --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_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/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_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/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_9ab91afb-3426-4e56-8214-5744f2e8e36d/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 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:48:43,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:48:43,660 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:48:43,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:48:43,672 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:48:43,710 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:48:43,712 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:48:43,712 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:48:43,713 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:48:43,718 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:48:43,719 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:48:43,720 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:48:43,721 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:48:43,722 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:48:43,723 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:48:43,723 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:48:43,724 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:48:43,724 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:48:43,725 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:48:43,725 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:48:43,725 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:48:43,726 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:48:43,726 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:48:43,727 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:48:43,727 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:48:43,728 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:48:43,728 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:48:43,729 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:48:43,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:48:43,730 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:48:43,731 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:48:43,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:43,732 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:48:43,732 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:48:43,732 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:48:43,732 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:48:43,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:48:43,733 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:48:43,733 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:48:43,733 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:48:43,733 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:48:43,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:48:43,734 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_9ab91afb-3426-4e56-8214-5744f2e8e36d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 [2023-11-26 10:48:44,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:48:44,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:48:44,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:48:44,080 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:48:44,081 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:48:44,082 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2023-11-26 10:48:47,044 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:48:47,333 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:48:47,336 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2023-11-26 10:48:47,347 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/data/e3f4ad853/547e53ea35234a78ab52e0d5d10131f8/FLAGc12c96384 [2023-11-26 10:48:47,361 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/data/e3f4ad853/547e53ea35234a78ab52e0d5d10131f8 [2023-11-26 10:48:47,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:48:47,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:48:47,367 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:47,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:48:47,373 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:48:47,374 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,375 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29f8db62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47, skipping insertion in model container [2023-11-26 10:48:47,375 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,400 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:48:47,545 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_9ab91afb-3426-4e56-8214-5744f2e8e36d/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2023-11-26 10:48:47,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:47,585 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:48:47,596 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_9ab91afb-3426-4e56-8214-5744f2e8e36d/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2023-11-26 10:48:47,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:47,620 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:48:47,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47 WrapperNode [2023-11-26 10:48:47,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:47,622 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:47,623 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:48:47,623 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:48:47,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,638 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,661 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2023-11-26 10:48:47,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:47,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:48:47,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:48:47,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:48:47,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,674 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,685 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:48:47,685 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,686 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,690 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,695 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,696 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:48:47,700 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:48:47,700 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:48:47,700 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:48:47,701 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (1/1) ... [2023-11-26 10:48:47,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:47,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:47,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:48:47,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:48:47,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:48:47,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:48:47,779 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:48:47,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:48:47,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:48:47,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:48:47,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 10:48:47,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 10:48:47,879 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:48:47,893 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:48:48,178 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:48:48,210 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:48:48,210 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:48:48,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:48 BoogieIcfgContainer [2023-11-26 10:48:48,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:48:48,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:48:48,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:48:48,217 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:48:48,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:48:47" (1/3) ... [2023-11-26 10:48:48,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bffa8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:48, skipping insertion in model container [2023-11-26 10:48:48,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:47" (2/3) ... [2023-11-26 10:48:48,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bffa8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:48, skipping insertion in model container [2023-11-26 10:48:48,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:48" (3/3) ... [2023-11-26 10:48:48,221 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2023-11-26 10:48:48,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:48:48,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:48:48,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:48:48,305 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;@1897626d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:48:48,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:48:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 10:48:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 10:48:48,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:48,317 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:48,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:48,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:48,323 INFO L85 PathProgramCache]: Analyzing trace with hash -689848145, now seen corresponding path program 1 times [2023-11-26 10:48:48,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:48,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227260584] [2023-11-26 10:48:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:48,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:48,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227260584] [2023-11-26 10:48:48,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:48:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702002776] [2023-11-26 10:48:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:48,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:48,518 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:48,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:48:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:48,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:48:48,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-26 10:48:48,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:48,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702002776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:48,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:48,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:48:48,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427703915] [2023-11-26 10:48:48,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:48,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:48:48,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:48,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:48:48,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:48:48,760 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:48:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:48,788 INFO L93 Difference]: Finished difference Result 60 states and 99 transitions. [2023-11-26 10:48:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:48:48,791 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-11-26 10:48:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:48,799 INFO L225 Difference]: With dead ends: 60 [2023-11-26 10:48:48,799 INFO L226 Difference]: Without dead ends: 29 [2023-11-26 10:48:48,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:48:48,806 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:48,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-26 10:48:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-26 10:48:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-26 10:48:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2023-11-26 10:48:48,849 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 27 [2023-11-26 10:48:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:48,849 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2023-11-26 10:48:48,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:48:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2023-11-26 10:48:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 10:48:48,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:48,852 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:48,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:48:49,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:48:49,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:49,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1989097615, now seen corresponding path program 1 times [2023-11-26 10:48:49,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:49,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898643350] [2023-11-26 10:48:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:49,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:49,078 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:49,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057791509] [2023-11-26 10:48:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:49,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:49,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:49,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:49,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:48:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:49,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:48:49,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-26 10:48:49,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:49,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:49,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898643350] [2023-11-26 10:48:49,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:49,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057791509] [2023-11-26 10:48:49,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057791509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:49,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:49,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:48:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012090281] [2023-11-26 10:48:49,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:49,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:48:49,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:49,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:48:49,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:48:49,275 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 10:48:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:49,305 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2023-11-26 10:48:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:48:49,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2023-11-26 10:48:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:49,307 INFO L225 Difference]: With dead ends: 39 [2023-11-26 10:48:49,307 INFO L226 Difference]: Without dead ends: 31 [2023-11-26 10:48:49,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:48:49,310 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:49,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-26 10:48:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-26 10:48:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-26 10:48:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-11-26 10:48:49,321 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 28 [2023-11-26 10:48:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:49,322 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-11-26 10:48:49,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 10:48:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-11-26 10:48:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 10:48:49,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:49,325 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:49,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:49,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:49,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:49,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:49,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1539070609, now seen corresponding path program 1 times [2023-11-26 10:48:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:49,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572064694] [2023-11-26 10:48:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:49,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:49,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:49,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241633105] [2023-11-26 10:48:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:49,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:49,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:49,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:49,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:48:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:49,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:48:49,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:48:49,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:48:49,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572064694] [2023-11-26 10:48:49,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241633105] [2023-11-26 10:48:49,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241633105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:49,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:49,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-11-26 10:48:49,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51697154] [2023-11-26 10:48:49,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:49,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:48:49,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:48:49,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:48:49,858 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:48:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:49,990 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2023-11-26 10:48:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:49,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-11-26 10:48:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:49,993 INFO L225 Difference]: With dead ends: 48 [2023-11-26 10:48:49,993 INFO L226 Difference]: Without dead ends: 40 [2023-11-26 10:48:49,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:48:49,995 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:49,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 97 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-26 10:48:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-11-26 10:48:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-26 10:48:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-11-26 10:48:50,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2023-11-26 10:48:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:50,009 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-11-26 10:48:50,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:48:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-11-26 10:48:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 10:48:50,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:50,011 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:50,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:50,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:50,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:50,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1634889762, now seen corresponding path program 1 times [2023-11-26 10:48:50,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:50,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742776198] [2023-11-26 10:48:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:50,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:50,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:50,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462214773] [2023-11-26 10:48:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:50,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:50,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:48:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:48:50,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:48:50,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-26 10:48:50,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:50,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742776198] [2023-11-26 10:48:50,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:50,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462214773] [2023-11-26 10:48:50,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462214773] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:50,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:48:50,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-11-26 10:48:50,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929478179] [2023-11-26 10:48:50,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:50,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:50,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:50,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:48:50,562 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 10:48:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:50,618 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-11-26 10:48:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:50,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-11-26 10:48:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:50,620 INFO L225 Difference]: With dead ends: 38 [2023-11-26 10:48:50,620 INFO L226 Difference]: Without dead ends: 36 [2023-11-26 10:48:50,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:48:50,622 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:50,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 116 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-26 10:48:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-26 10:48:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-26 10:48:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-11-26 10:48:50,634 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 31 [2023-11-26 10:48:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:50,634 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-11-26 10:48:50,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 10:48:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-11-26 10:48:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 10:48:50,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:50,636 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:50,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:50,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:50,843 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:50,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:50,844 INFO L85 PathProgramCache]: Analyzing trace with hash 753217482, now seen corresponding path program 1 times [2023-11-26 10:48:50,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:50,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504639550] [2023-11-26 10:48:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:50,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:50,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:50,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602498205] [2023-11-26 10:48:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:50,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:50,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:50,880 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:50,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:48:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:48:50,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-26 10:48:51,018 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:51,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:51,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504639550] [2023-11-26 10:48:51,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:51,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602498205] [2023-11-26 10:48:51,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602498205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:51,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:51,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:48:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641275597] [2023-11-26 10:48:51,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:51,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:51,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:51,030 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 10:48:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:51,068 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2023-11-26 10:48:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:48:51,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2023-11-26 10:48:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:51,069 INFO L225 Difference]: With dead ends: 61 [2023-11-26 10:48:51,070 INFO L226 Difference]: Without dead ends: 38 [2023-11-26 10:48:51,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:51,071 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:51,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-26 10:48:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-26 10:48:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-26 10:48:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-11-26 10:48:51,084 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 34 [2023-11-26 10:48:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:51,084 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-11-26 10:48:51,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 10:48:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-11-26 10:48:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 10:48:51,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:51,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:51,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 10:48:51,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:51,291 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:51,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:51,292 INFO L85 PathProgramCache]: Analyzing trace with hash 120049922, now seen corresponding path program 1 times [2023-11-26 10:48:51,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:51,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364190398] [2023-11-26 10:48:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:51,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:51,304 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:51,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700042661] [2023-11-26 10:48:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:51,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:51,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:51,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:51,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:48:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:51,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 10:48:51,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:48:51,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-26 10:48:51,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:51,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364190398] [2023-11-26 10:48:51,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:51,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700042661] [2023-11-26 10:48:51,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700042661] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:51,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:48:51,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-11-26 10:48:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058388779] [2023-11-26 10:48:51,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:51,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:51,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:48:51,776 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:48:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:51,858 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2023-11-26 10:48:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:51,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-11-26 10:48:51,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:51,860 INFO L225 Difference]: With dead ends: 52 [2023-11-26 10:48:51,860 INFO L226 Difference]: Without dead ends: 50 [2023-11-26 10:48:51,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:48:51,862 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:51,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 133 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-26 10:48:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-11-26 10:48:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-26 10:48:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2023-11-26 10:48:51,878 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 36 [2023-11-26 10:48:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:51,878 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2023-11-26 10:48:51,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:48:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2023-11-26 10:48:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 10:48:51,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:51,880 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:51,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:52,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:48:52,086 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:52,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash 391757342, now seen corresponding path program 1 times [2023-11-26 10:48:52,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:52,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476332814] [2023-11-26 10:48:52,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:52,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:52,101 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:52,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834987576] [2023-11-26 10:48:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:52,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:52,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:52,106 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:52,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:48:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:52,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 10:48:52,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:48:52,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-26 10:48:52,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:52,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476332814] [2023-11-26 10:48:52,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:52,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834987576] [2023-11-26 10:48:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834987576] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:52,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:48:52,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-11-26 10:48:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366149846] [2023-11-26 10:48:52,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:52,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:52,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:52,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:52,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:48:52,592 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:48:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:52,668 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2023-11-26 10:48:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2023-11-26 10:48:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:52,674 INFO L225 Difference]: With dead ends: 56 [2023-11-26 10:48:52,675 INFO L226 Difference]: Without dead ends: 54 [2023-11-26 10:48:52,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:48:52,677 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:52,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-26 10:48:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-11-26 10:48:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-26 10:48:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2023-11-26 10:48:52,712 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 41 [2023-11-26 10:48:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:52,715 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2023-11-26 10:48:52,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:48:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2023-11-26 10:48:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-26 10:48:52,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:52,720 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:52,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:52,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:48:52,932 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:52,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash 439925314, now seen corresponding path program 1 times [2023-11-26 10:48:52,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:52,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167150537] [2023-11-26 10:48:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:52,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:52,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921181466] [2023-11-26 10:48:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:52,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:52,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:52,944 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:52,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:48:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:53,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 10:48:53,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 10:48:53,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:57,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:57,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167150537] [2023-11-26 10:48:57,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:57,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921181466] [2023-11-26 10:48:57,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921181466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:57,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:48:57,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-26 10:48:57,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242473712] [2023-11-26 10:48:57,382 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:57,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:48:57,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:48:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2023-11-26 10:48:57,383 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-26 10:48:57,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:57,543 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-11-26 10:48:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:48:57,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-11-26 10:48:57,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:57,545 INFO L225 Difference]: With dead ends: 60 [2023-11-26 10:48:57,545 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 10:48:57,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2023-11-26 10:48:57,546 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:57,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 121 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 10:48:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-11-26 10:48:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-26 10:48:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2023-11-26 10:48:57,569 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 46 [2023-11-26 10:48:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:57,570 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2023-11-26 10:48:57,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-26 10:48:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2023-11-26 10:48:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 10:48:57,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:57,572 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:57,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:57,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:57,778 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:57,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:57,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1428774585, now seen corresponding path program 1 times [2023-11-26 10:48:57,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:57,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326188404] [2023-11-26 10:48:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:57,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:57,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:57,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829502546] [2023-11-26 10:48:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:57,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:57,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:57,801 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:57,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:48:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:57,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:48:57,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-26 10:48:58,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-26 10:48:58,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:58,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326188404] [2023-11-26 10:48:58,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:58,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829502546] [2023-11-26 10:48:58,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829502546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:58,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:58,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-26 10:48:58,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737564719] [2023-11-26 10:48:58,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:58,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:48:58,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:48:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:48:58,131 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-26 10:48:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:58,341 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2023-11-26 10:48:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:48:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 55 [2023-11-26 10:48:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:58,345 INFO L225 Difference]: With dead ends: 210 [2023-11-26 10:48:58,346 INFO L226 Difference]: Without dead ends: 202 [2023-11-26 10:48:58,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:48:58,347 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:58,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 146 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-26 10:48:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2023-11-26 10:48:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 128 states have internal predecessors, (148), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-26 10:48:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2023-11-26 10:48:58,399 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 55 [2023-11-26 10:48:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:58,400 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2023-11-26 10:48:58,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-26 10:48:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2023-11-26 10:48:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-26 10:48:58,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:58,402 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:58,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:58,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 10:48:58,608 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:58,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1348925863, now seen corresponding path program 1 times [2023-11-26 10:48:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:58,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472550816] [2023-11-26 10:48:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:58,634 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:58,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821428449] [2023-11-26 10:48:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:58,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:58,646 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:58,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:48:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:58,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:48:58,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-26 10:48:58,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-26 10:48:58,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:58,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472550816] [2023-11-26 10:48:58,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:58,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821428449] [2023-11-26 10:48:58,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821428449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:58,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:58,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-11-26 10:48:58,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030644695] [2023-11-26 10:48:58,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:58,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:48:58,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:48:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:48:58,905 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-26 10:48:59,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:59,209 INFO L93 Difference]: Finished difference Result 278 states and 363 transitions. [2023-11-26 10:48:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:48:59,210 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2023-11-26 10:48:59,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:59,212 INFO L225 Difference]: With dead ends: 278 [2023-11-26 10:48:59,213 INFO L226 Difference]: Without dead ends: 258 [2023-11-26 10:48:59,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:48:59,214 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 70 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:59,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 319 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:59,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-26 10:48:59,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 234. [2023-11-26 10:48:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 154 states have internal predecessors, (185), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-26 10:48:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 298 transitions. [2023-11-26 10:48:59,274 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 298 transitions. Word has length 56 [2023-11-26 10:48:59,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:59,274 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 298 transitions. [2023-11-26 10:48:59,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-26 10:48:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 298 transitions. [2023-11-26 10:48:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-26 10:48:59,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:59,276 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:59,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:59,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:59,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:59,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash -848672706, now seen corresponding path program 1 times [2023-11-26 10:48:59,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:59,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113747651] [2023-11-26 10:48:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:59,494 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:59,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866228142] [2023-11-26 10:48:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:59,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:59,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:59,496 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:59,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:48:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:48:59,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-26 10:48:59,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-26 10:48:59,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:59,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113747651] [2023-11-26 10:48:59,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:59,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866228142] [2023-11-26 10:48:59,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866228142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:59,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:59,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-26 10:48:59,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127344566] [2023-11-26 10:48:59,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:59,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:48:59,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:48:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:48:59,752 INFO L87 Difference]: Start difference. First operand 234 states and 298 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-26 10:48:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:59,975 INFO L93 Difference]: Finished difference Result 343 states and 447 transitions. [2023-11-26 10:48:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:48:59,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 58 [2023-11-26 10:48:59,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:59,980 INFO L225 Difference]: With dead ends: 343 [2023-11-26 10:48:59,980 INFO L226 Difference]: Without dead ends: 247 [2023-11-26 10:48:59,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:48:59,984 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 66 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:59,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 173 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-26 10:49:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2023-11-26 10:49:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 160 states have (on average 1.175) internal successors, (188), 163 states have internal predecessors, (188), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-26 10:49:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 301 transitions. [2023-11-26 10:49:00,045 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 301 transitions. Word has length 58 [2023-11-26 10:49:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:00,047 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 301 transitions. [2023-11-26 10:49:00,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-26 10:49:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 301 transitions. [2023-11-26 10:49:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 10:49:00,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:00,049 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:00,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:00,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:00,256 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:00,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:00,256 INFO L85 PathProgramCache]: Analyzing trace with hash -421956392, now seen corresponding path program 1 times [2023-11-26 10:49:00,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:00,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849559308] [2023-11-26 10:49:00,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:00,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:00,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:00,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019106274] [2023-11-26 10:49:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:00,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:00,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:00,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:00,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:49:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:00,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 10:49:00,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 10:49:00,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-26 10:49:00,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:00,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849559308] [2023-11-26 10:49:00,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:00,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019106274] [2023-11-26 10:49:00,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019106274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:00,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:00,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-11-26 10:49:00,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110374803] [2023-11-26 10:49:00,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:00,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 10:49:00,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:00,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 10:49:00,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:49:00,690 INFO L87 Difference]: Start difference. First operand 243 states and 301 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-26 10:49:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:01,145 INFO L93 Difference]: Finished difference Result 329 states and 428 transitions. [2023-11-26 10:49:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:49:01,146 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 63 [2023-11-26 10:49:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:01,150 INFO L225 Difference]: With dead ends: 329 [2023-11-26 10:49:01,150 INFO L226 Difference]: Without dead ends: 323 [2023-11-26 10:49:01,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:49:01,151 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 39 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:01,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 377 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:49:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-26 10:49:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 290. [2023-11-26 10:49:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 193 states have (on average 1.1968911917098446) internal successors, (231), 202 states have internal predecessors, (231), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-26 10:49:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 365 transitions. [2023-11-26 10:49:01,226 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 365 transitions. Word has length 63 [2023-11-26 10:49:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:01,227 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 365 transitions. [2023-11-26 10:49:01,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-26 10:49:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 365 transitions. [2023-11-26 10:49:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-26 10:49:01,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:01,229 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:01,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:01,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:01,436 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:01,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash -245166072, now seen corresponding path program 2 times [2023-11-26 10:49:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:01,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115874696] [2023-11-26 10:49:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:01,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:01,458 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:01,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830941538] [2023-11-26 10:49:01,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:49:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:01,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:01,459 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:01,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:49:01,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:49:01,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:01,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-26 10:49:01,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 10:49:02,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:02,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:02,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115874696] [2023-11-26 10:49:02,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830941538] [2023-11-26 10:49:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830941538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:02,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:49:02,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-26 10:49:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933860232] [2023-11-26 10:49:02,299 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:02,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:49:02,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:49:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:49:02,302 INFO L87 Difference]: Start difference. First operand 290 states and 365 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-26 10:49:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:02,832 INFO L93 Difference]: Finished difference Result 314 states and 392 transitions. [2023-11-26 10:49:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:49:02,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2023-11-26 10:49:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:02,836 INFO L225 Difference]: With dead ends: 314 [2023-11-26 10:49:02,836 INFO L226 Difference]: Without dead ends: 312 [2023-11-26 10:49:02,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:49:02,837 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 54 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:02,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 254 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:49:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-26 10:49:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2023-11-26 10:49:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 205 states have (on average 1.1951219512195121) internal successors, (245), 214 states have internal predecessors, (245), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-26 10:49:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 387 transitions. [2023-11-26 10:49:02,911 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 387 transitions. Word has length 68 [2023-11-26 10:49:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:02,911 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 387 transitions. [2023-11-26 10:49:02,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-26 10:49:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 387 transitions. [2023-11-26 10:49:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-26 10:49:02,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:02,913 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:02,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:03,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:03,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:03,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:03,120 INFO L85 PathProgramCache]: Analyzing trace with hash -441972072, now seen corresponding path program 3 times [2023-11-26 10:49:03,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:03,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493505813] [2023-11-26 10:49:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:03,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:03,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:03,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400613290] [2023-11-26 10:49:03,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:49:03,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:03,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:03,149 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:03,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 10:49:03,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 10:49:03,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:03,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-26 10:49:03,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-26 10:49:06,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:07,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:07,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493505813] [2023-11-26 10:49:07,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:07,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400613290] [2023-11-26 10:49:07,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400613290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:07,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:49:07,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-26 10:49:07,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803163998] [2023-11-26 10:49:07,344 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:07,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:49:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:07,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:49:07,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:49:07,346 INFO L87 Difference]: Start difference. First operand 309 states and 387 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-26 10:49:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:09,114 INFO L93 Difference]: Finished difference Result 326 states and 403 transitions. [2023-11-26 10:49:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:49:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2023-11-26 10:49:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:09,118 INFO L225 Difference]: With dead ends: 326 [2023-11-26 10:49:09,118 INFO L226 Difference]: Without dead ends: 322 [2023-11-26 10:49:09,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-11-26 10:49:09,119 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:09,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 241 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:49:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-26 10:49:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2023-11-26 10:49:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 213 states have (on average 1.1830985915492958) internal successors, (252), 221 states have internal predecessors, (252), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-26 10:49:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 394 transitions. [2023-11-26 10:49:09,190 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 394 transitions. Word has length 73 [2023-11-26 10:49:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:09,190 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 394 transitions. [2023-11-26 10:49:09,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-26 10:49:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 394 transitions. [2023-11-26 10:49:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-26 10:49:09,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:09,192 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:09,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:09,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:49:09,399 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:09,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2054740817, now seen corresponding path program 1 times [2023-11-26 10:49:09,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:09,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490387341] [2023-11-26 10:49:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:09,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:09,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:09,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137581307] [2023-11-26 10:49:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:09,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:09,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:09,434 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:09,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 10:49:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:09,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-26 10:49:09,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-26 10:49:10,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-26 10:49:11,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490387341] [2023-11-26 10:49:11,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:11,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137581307] [2023-11-26 10:49:11,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137581307] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:11,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:11,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-11-26 10:49:11,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244480098] [2023-11-26 10:49:11,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 10:49:11,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 10:49:11,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:49:11,354 INFO L87 Difference]: Start difference. First operand 319 states and 394 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-11-26 10:49:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:23,744 INFO L93 Difference]: Finished difference Result 453 states and 600 transitions. [2023-11-26 10:49:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-26 10:49:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2023-11-26 10:49:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:23,749 INFO L225 Difference]: With dead ends: 453 [2023-11-26 10:49:23,749 INFO L226 Difference]: Without dead ends: 442 [2023-11-26 10:49:23,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2023-11-26 10:49:23,752 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 149 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:23,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 666 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-26 10:49:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-11-26 10:49:23,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 409. [2023-11-26 10:49:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 271 states have (on average 1.2324723247232472) internal successors, (334), 280 states have internal predecessors, (334), 103 states have call successors, (103), 34 states have call predecessors, (103), 34 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-26 10:49:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 538 transitions. [2023-11-26 10:49:23,899 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 538 transitions. Word has length 79 [2023-11-26 10:49:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:23,900 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 538 transitions. [2023-11-26 10:49:23,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-11-26 10:49:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 538 transitions. [2023-11-26 10:49:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-26 10:49:23,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:23,902 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:23,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:24,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:49:24,108 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:24,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:24,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1545591774, now seen corresponding path program 4 times [2023-11-26 10:49:24,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:24,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069268592] [2023-11-26 10:49:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:24,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:24,131 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:24,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635107447] [2023-11-26 10:49:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:49:24,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:24,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:24,133 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:24,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 10:49:24,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:49:24,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:24,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:49:24,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-26 10:49:24,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:24,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069268592] [2023-11-26 10:49:24,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:24,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635107447] [2023-11-26 10:49:24,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635107447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:24,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:24,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:49:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896854073] [2023-11-26 10:49:24,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:24,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:49:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:49:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:49:24,265 INFO L87 Difference]: Start difference. First operand 409 states and 538 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-26 10:49:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:24,498 INFO L93 Difference]: Finished difference Result 622 states and 881 transitions. [2023-11-26 10:49:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:49:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 95 [2023-11-26 10:49:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:24,503 INFO L225 Difference]: With dead ends: 622 [2023-11-26 10:49:24,503 INFO L226 Difference]: Without dead ends: 447 [2023-11-26 10:49:24,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:49:24,505 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:24,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 177 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-26 10:49:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 404. [2023-11-26 10:49:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 264 states have (on average 1.231060606060606) internal successors, (325), 270 states have internal predecessors, (325), 105 states have call successors, (105), 34 states have call predecessors, (105), 34 states have return successors, (103), 99 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-26 10:49:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 533 transitions. [2023-11-26 10:49:24,668 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 533 transitions. Word has length 95 [2023-11-26 10:49:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:24,669 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 533 transitions. [2023-11-26 10:49:24,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-26 10:49:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 533 transitions. [2023-11-26 10:49:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-26 10:49:24,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:24,672 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:24,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:24,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:24,878 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:24,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:24,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1858222944, now seen corresponding path program 1 times [2023-11-26 10:49:24,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:24,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631192381] [2023-11-26 10:49:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:24,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:24,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:24,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576320122] [2023-11-26 10:49:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:24,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:24,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:24,894 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:24,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ab91afb-3426-4e56-8214-5744f2e8e36d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 10:49:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:24,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-26 10:49:24,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-11-26 10:49:26,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-11-26 10:49:31,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631192381] [2023-11-26 10:49:31,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:31,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576320122] [2023-11-26 10:49:31,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576320122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:31,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:31,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-11-26 10:49:31,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912127785] [2023-11-26 10:49:31,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:31,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 10:49:31,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:31,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 10:49:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-11-26 10:49:31,396 INFO L87 Difference]: Start difference. First operand 404 states and 533 transitions. Second operand has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30)