./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU --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 cb55eb0e5d7c4df3b95a55b83f19894edf68e79ccb0eab5e69a8aa23c994caed --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:14:15,596 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:14:15,687 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:14:15,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:14:15,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:14:15,722 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:14:15,723 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:14:15,723 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:14:15,724 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:14:15,725 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:14:15,725 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:14:15,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:14:15,726 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:14:15,727 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:14:15,727 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:14:15,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:14:15,728 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:14:15,729 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:14:15,729 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:14:15,730 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:14:15,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:14:15,732 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:14:15,733 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:14:15,733 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:14:15,733 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:14:15,734 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:14:15,734 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:14:15,734 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:14:15,735 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:14:15,735 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:14:15,735 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:14:15,736 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:14:15,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:15,741 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:14:15,741 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:14:15,742 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:14:15,742 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:14:15,743 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:14:15,743 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:14:15,744 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:14:15,744 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:14:15,745 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:14:15,745 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_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb55eb0e5d7c4df3b95a55b83f19894edf68e79ccb0eab5e69a8aa23c994caed [2024-10-31 22:14:16,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:14:16,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:14:16,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:14:16,162 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:14:16,166 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:14:16,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c Unable to find full path for "g++" [2024-10-31 22:14:18,314 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:14:18,544 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:14:18,547 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2024-10-31 22:14:18,558 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/data/a178749dd/1b805116ac0a4a5e80d3b810adb0e9e5/FLAGb9000a4b4 [2024-10-31 22:14:18,574 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/data/a178749dd/1b805116ac0a4a5e80d3b810adb0e9e5 [2024-10-31 22:14:18,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:14:18,578 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:14:18,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:18,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:14:18,586 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:14:18,590 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:18,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ebcc2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18, skipping insertion in model container [2024-10-31 22:14:18,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:18,619 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:14:18,872 WARN L251 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_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c[588,601] [2024-10-31 22:14:18,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:18,922 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:14:18,939 WARN L251 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_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c[588,601] [2024-10-31 22:14:18,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:18,989 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:14:18,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18 WrapperNode [2024-10-31 22:14:18,989 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:18,991 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:18,991 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:14:18,991 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:14:18,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,011 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,044 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2024-10-31 22:14:19,045 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:19,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:14:19,046 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:14:19,046 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:14:19,057 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,059 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,078 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]. [2024-10-31 22:14:19,079 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,079 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,083 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,090 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,094 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:14:19,102 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:14:19,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:14:19,102 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:14:19,103 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (1/1) ... [2024-10-31 22:14:19,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:19,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:19,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:14:19,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:14:19,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:14:19,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:14:19,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:14:19,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:14:19,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 22:14:19,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 22:14:19,265 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:14:19,267 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:14:19,507 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-10-31 22:14:19,508 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:14:19,527 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:14:19,529 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:14:19,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:19 BoogieIcfgContainer [2024-10-31 22:14:19,530 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:14:19,535 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:14:19,536 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:14:19,540 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:14:19,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:14:18" (1/3) ... [2024-10-31 22:14:19,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b88165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:19, skipping insertion in model container [2024-10-31 22:14:19,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:18" (2/3) ... [2024-10-31 22:14:19,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b88165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:19, skipping insertion in model container [2024-10-31 22:14:19,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:19" (3/3) ... [2024-10-31 22:14:19,547 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound50.c [2024-10-31 22:14:19,577 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:14:19,578 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:14:19,657 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:14:19,682 INFO L333 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, 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;@14325069, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:14:19,683 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:14:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-31 22:14:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-31 22:14:19,704 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:19,704 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:19,705 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:19,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:19,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2024-10-31 22:14:19,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:19,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964412979] [2024-10-31 22:14:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:19,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:19,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:19,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964412979] [2024-10-31 22:14:19,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964412979] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:19,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:19,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718197441] [2024-10-31 22:14:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:19,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:14:19,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:19,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:14:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:14:19,951 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:19,974 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2024-10-31 22:14:19,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:14:19,976 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-31 22:14:19,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:19,982 INFO L225 Difference]: With dead ends: 50 [2024-10-31 22:14:19,983 INFO L226 Difference]: Without dead ends: 22 [2024-10-31 22:14:19,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:14:19,990 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:19,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:14:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-31 22:14:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-31 22:14:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:14:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2024-10-31 22:14:20,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2024-10-31 22:14:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:20,044 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2024-10-31 22:14:20,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2024-10-31 22:14:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 22:14:20,047 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:20,047 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:20,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:14:20,048 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:20,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2024-10-31 22:14:20,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:20,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875823245] [2024-10-31 22:14:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:20,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:20,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:20,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875823245] [2024-10-31 22:14:20,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875823245] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:20,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:20,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:20,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570981338] [2024-10-31 22:14:20,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:20,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:20,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:20,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:20,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:20,243 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:20,287 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2024-10-31 22:14:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:20,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 22:14:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:20,290 INFO L225 Difference]: With dead ends: 36 [2024-10-31 22:14:20,291 INFO L226 Difference]: Without dead ends: 24 [2024-10-31 22:14:20,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:20,294 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:20,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:14:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-31 22:14:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-31 22:14:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:14:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2024-10-31 22:14:20,313 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2024-10-31 22:14:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:20,313 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2024-10-31 22:14:20,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:20,316 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2024-10-31 22:14:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 22:14:20,317 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:20,317 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:20,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:14:20,318 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:20,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2024-10-31 22:14:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:20,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535122259] [2024-10-31 22:14:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:20,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:20,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:20,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535122259] [2024-10-31 22:14:20,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535122259] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:20,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:20,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:14:20,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898915581] [2024-10-31 22:14:20,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:20,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:20,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:20,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:20,570 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:20,796 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2024-10-31 22:14:20,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:20,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 22:14:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:20,798 INFO L225 Difference]: With dead ends: 30 [2024-10-31 22:14:20,798 INFO L226 Difference]: Without dead ends: 28 [2024-10-31 22:14:20,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:20,801 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:20,802 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 85 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-31 22:14:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-31 22:14:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:14:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2024-10-31 22:14:20,827 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2024-10-31 22:14:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:20,828 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2024-10-31 22:14:20,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2024-10-31 22:14:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-31 22:14:20,830 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:20,830 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:20,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:14:20,832 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:20,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2024-10-31 22:14:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514340698] [2024-10-31 22:14:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:20,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:14:20,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151765046] [2024-10-31 22:14:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:20,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:20,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:20,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:20,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:14:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:20,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:14:20,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:21,081 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:14:21,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:21,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514340698] [2024-10-31 22:14:21,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:14:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151765046] [2024-10-31 22:14:21,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151765046] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:21,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:21,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:14:21,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085641291] [2024-10-31 22:14:21,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:21,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:21,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:21,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:21,089 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:14:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:21,221 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2024-10-31 22:14:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:21,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-31 22:14:21,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:21,223 INFO L225 Difference]: With dead ends: 46 [2024-10-31 22:14:21,223 INFO L226 Difference]: Without dead ends: 44 [2024-10-31 22:14:21,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:21,225 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:21,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 120 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-31 22:14:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2024-10-31 22:14:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-31 22:14:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-10-31 22:14:21,250 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 13 [2024-10-31 22:14:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:21,250 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-10-31 22:14:21,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:14:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-10-31 22:14:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:14:21,252 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:21,252 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:21,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:14:21,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:21,454 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:21,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:21,475 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2024-10-31 22:14:21,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:21,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662283353] [2024-10-31 22:14:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:21,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:14:21,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15319967] [2024-10-31 22:14:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:21,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:21,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:21,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:21,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:14:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:21,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:14:21,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:14:21,724 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:14:21,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:21,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662283353] [2024-10-31 22:14:21,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:14:21,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15319967] [2024-10-31 22:14:21,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15319967] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:21,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:21,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:14:21,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421400121] [2024-10-31 22:14:21,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:21,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:21,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:21,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:21,728 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:14:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:21,844 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2024-10-31 22:14:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-10-31 22:14:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:21,846 INFO L225 Difference]: With dead ends: 50 [2024-10-31 22:14:21,846 INFO L226 Difference]: Without dead ends: 48 [2024-10-31 22:14:21,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:21,848 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:21,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:21,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-31 22:14:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-10-31 22:14:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-31 22:14:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2024-10-31 22:14:21,880 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18 [2024-10-31 22:14:21,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:21,880 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2024-10-31 22:14:21,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:14:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2024-10-31 22:14:21,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-31 22:14:21,883 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:21,883 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:21,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:22,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:22,086 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:22,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:22,087 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2024-10-31 22:14:22,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:22,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977498698] [2024-10-31 22:14:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:22,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:14:22,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795442376] [2024-10-31 22:14:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:22,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:22,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:22,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:22,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:14:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:22,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:14:22,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:14:22,281 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:14:22,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977498698] [2024-10-31 22:14:22,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:14:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795442376] [2024-10-31 22:14:22,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795442376] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:22,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:22,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:14:22,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238343728] [2024-10-31 22:14:22,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:22,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:22,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:22,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:22,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:22,284 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:14:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:22,391 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2024-10-31 22:14:22,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:22,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-10-31 22:14:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:22,393 INFO L225 Difference]: With dead ends: 58 [2024-10-31 22:14:22,393 INFO L226 Difference]: Without dead ends: 46 [2024-10-31 22:14:22,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:22,394 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:22,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 115 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-31 22:14:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-31 22:14:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-31 22:14:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-10-31 22:14:22,408 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 23 [2024-10-31 22:14:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:22,409 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-10-31 22:14:22,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:14:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-10-31 22:14:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 22:14:22,410 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:22,410 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:22,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:22,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:22,613 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:22,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2024-10-31 22:14:22,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:22,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140010232] [2024-10-31 22:14:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:22,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:22,757 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:14:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:22,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-31 22:14:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:22,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 22:14:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:22,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 22:14:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:22,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:14:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:22,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 22:14:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-31 22:14:22,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:22,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140010232] [2024-10-31 22:14:22,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140010232] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:22,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047918559] [2024-10-31 22:14:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:22,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:22,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:22,798 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:22,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:14:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:22,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:14:22,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-31 22:14:22,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-31 22:14:23,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047918559] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:23,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:23,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-10-31 22:14:23,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386176351] [2024-10-31 22:14:23,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:23,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:14:23,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:14:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:14:23,078 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-10-31 22:14:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:23,306 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2024-10-31 22:14:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:14:23,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 41 [2024-10-31 22:14:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:23,308 INFO L225 Difference]: With dead ends: 116 [2024-10-31 22:14:23,308 INFO L226 Difference]: Without dead ends: 100 [2024-10-31 22:14:23,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:14:23,309 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:23,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 138 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-31 22:14:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2024-10-31 22:14:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 47 states have (on average 1.148936170212766) internal successors, (54), 50 states have internal predecessors, (54), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-10-31 22:14:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2024-10-31 22:14:23,350 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 41 [2024-10-31 22:14:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:23,350 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2024-10-31 22:14:23,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-10-31 22:14:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2024-10-31 22:14:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 22:14:23,352 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:23,352 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:23,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:23,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:23,553 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:23,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:23,553 INFO L85 PathProgramCache]: Analyzing trace with hash -680109588, now seen corresponding path program 1 times [2024-10-31 22:14:23,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:23,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385973406] [2024-10-31 22:14:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:23,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:14:23,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103925673] [2024-10-31 22:14:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:23,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:23,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:23,598 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:23,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:14:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:23,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-31 22:14:23,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 22:14:23,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 22:14:24,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385973406] [2024-10-31 22:14:24,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:14:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103925673] [2024-10-31 22:14:24,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103925673] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:24,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:14:24,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-10-31 22:14:24,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927722619] [2024-10-31 22:14:24,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:24,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:14:24,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:14:24,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:14:24,086 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-31 22:14:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:24,473 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2024-10-31 22:14:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:14:24,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 41 [2024-10-31 22:14:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:24,476 INFO L225 Difference]: With dead ends: 114 [2024-10-31 22:14:24,476 INFO L226 Difference]: Without dead ends: 112 [2024-10-31 22:14:24,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:14:24,477 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:24,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 164 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:14:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-31 22:14:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-10-31 22:14:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 59 states have (on average 1.11864406779661) internal successors, (66), 62 states have internal predecessors, (66), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-10-31 22:14:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2024-10-31 22:14:24,533 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 41 [2024-10-31 22:14:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:24,534 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2024-10-31 22:14:24,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-31 22:14:24,534 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2024-10-31 22:14:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 22:14:24,544 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:24,545 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:24,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:24,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:24,745 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:24,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:24,746 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 2 times [2024-10-31 22:14:24,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:24,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104927650] [2024-10-31 22:14:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:24,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:14:24,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496133534] [2024-10-31 22:14:24,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:14:24,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:24,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:24,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:24,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:14:24,856 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:14:24,857 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:24,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 22:14:24,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-31 22:14:25,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-31 22:14:25,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:25,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104927650] [2024-10-31 22:14:25,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:14:25,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496133534] [2024-10-31 22:14:25,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496133534] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:25,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:14:25,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2024-10-31 22:14:25,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73648124] [2024-10-31 22:14:25,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:25,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:14:25,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:25,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:14:25,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:14:25,390 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2024-10-31 22:14:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:25,791 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2024-10-31 22:14:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:14:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2024-10-31 22:14:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:25,797 INFO L225 Difference]: With dead ends: 127 [2024-10-31 22:14:25,797 INFO L226 Difference]: Without dead ends: 122 [2024-10-31 22:14:25,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:14:25,799 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:25,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 110 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:14:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-31 22:14:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2024-10-31 22:14:25,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 71 states have internal predecessors, (75), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-10-31 22:14:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2024-10-31 22:14:25,859 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 46 [2024-10-31 22:14:25,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:25,859 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2024-10-31 22:14:25,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2024-10-31 22:14:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2024-10-31 22:14:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-31 22:14:25,861 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:25,861 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:25,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:14:26,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:26,065 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:26,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:26,065 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2024-10-31 22:14:26,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:26,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965686727] [2024-10-31 22:14:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:26,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:14:26,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438381735] [2024-10-31 22:14:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:26,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:26,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:26,115 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:26,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:14:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:26,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 22:14:26,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-10-31 22:14:26,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-10-31 22:14:27,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:27,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965686727] [2024-10-31 22:14:27,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:14:27,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438381735] [2024-10-31 22:14:27,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438381735] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:27,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:14:27,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2024-10-31 22:14:27,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362829470] [2024-10-31 22:14:27,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:27,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:14:27,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:14:27,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:14:27,105 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2024-10-31 22:14:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:27,881 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2024-10-31 22:14:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:14:27,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 67 [2024-10-31 22:14:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:27,883 INFO L225 Difference]: With dead ends: 137 [2024-10-31 22:14:27,883 INFO L226 Difference]: Without dead ends: 133 [2024-10-31 22:14:27,884 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:14:27,884 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:27,885 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 172 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 22:14:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-31 22:14:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-10-31 22:14:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 79 states have internal predecessors, (82), 37 states have call successors, (37), 20 states have call predecessors, (37), 19 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2024-10-31 22:14:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2024-10-31 22:14:27,937 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 67 [2024-10-31 22:14:27,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:27,938 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2024-10-31 22:14:27,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2024-10-31 22:14:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2024-10-31 22:14:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-31 22:14:27,939 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:27,939 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:27,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:14:28,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:14:28,144 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:28,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:28,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times [2024-10-31 22:14:28,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:28,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718242933] [2024-10-31 22:14:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:28,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:14:28,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182493625] [2024-10-31 22:14:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:28,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:28,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:28,173 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:28,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:14:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:28,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 22:14:28,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-10-31 22:14:28,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-10-31 22:14:28,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:28,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718242933] [2024-10-31 22:14:28,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:14:28,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182493625] [2024-10-31 22:14:28,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182493625] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:28,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:14:28,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-10-31 22:14:28,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63317102] [2024-10-31 22:14:28,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:28,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:14:28,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:14:28,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:14:28,966 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2024-10-31 22:14:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:30,032 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2024-10-31 22:14:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:14:30,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 72 [2024-10-31 22:14:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:30,035 INFO L225 Difference]: With dead ends: 144 [2024-10-31 22:14:30,035 INFO L226 Difference]: Without dead ends: 133 [2024-10-31 22:14:30,036 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:14:30,037 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:30,037 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 177 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-31 22:14:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-31 22:14:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-10-31 22:14:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 80 states have internal predecessors, (82), 35 states have call successors, (35), 20 states have call predecessors, (35), 20 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2024-10-31 22:14:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2024-10-31 22:14:30,115 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 72 [2024-10-31 22:14:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:30,116 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2024-10-31 22:14:30,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2024-10-31 22:14:30,116 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2024-10-31 22:14:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-31 22:14:30,118 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:30,119 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-31 22:14:30,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:30,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:30,324 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:30,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:30,326 INFO L85 PathProgramCache]: Analyzing trace with hash 514910066, now seen corresponding path program 3 times [2024-10-31 22:14:30,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:30,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687763605] [2024-10-31 22:14:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:30,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:14:30,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726187729] [2024-10-31 22:14:30,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:14:30,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:30,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:30,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:14:30,520 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:14:30,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:30,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-31 22:14:30,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-31 22:14:30,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-31 22:14:31,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:31,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687763605] [2024-10-31 22:14:31,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:14:31,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726187729] [2024-10-31 22:14:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726187729] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:31,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:14:31,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-10-31 22:14:31,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127163222] [2024-10-31 22:14:31,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:31,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:14:31,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:31,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:14:31,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:14:31,832 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2024-10-31 22:14:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:33,272 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2024-10-31 22:14:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:14:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 79 [2024-10-31 22:14:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:33,274 INFO L225 Difference]: With dead ends: 140 [2024-10-31 22:14:33,274 INFO L226 Difference]: Without dead ends: 122 [2024-10-31 22:14:33,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:14:33,276 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 16 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:33,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 217 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-31 22:14:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-31 22:14:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2024-10-31 22:14:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 76 states have internal predecessors, (77), 27 states have call successors, (27), 19 states have call predecessors, (27), 19 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-31 22:14:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2024-10-31 22:14:33,324 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 79 [2024-10-31 22:14:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:33,325 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2024-10-31 22:14:33,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2024-10-31 22:14:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2024-10-31 22:14:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-10-31 22:14:33,327 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:33,327 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:33,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:14:33,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:33,531 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:33,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times [2024-10-31 22:14:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:33,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758458574] [2024-10-31 22:14:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:33,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:14:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-31 22:14:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 22:14:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,879 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 22:14:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:14:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,889 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 22:14:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-31 22:14:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-31 22:14:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-31 22:14:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-31 22:14:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-31 22:14:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-10-31 22:14:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-31 22:14:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-31 22:14:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-10-31 22:14:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-10-31 22:14:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-10-31 22:14:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-10-31 22:14:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-10-31 22:14:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-10-31 22:14:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,979 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-10-31 22:14:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-10-31 22:14:33,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:33,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758458574] [2024-10-31 22:14:33,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758458574] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:33,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557255921] [2024-10-31 22:14:33,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:14:33,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:33,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:33,987 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:33,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:14:34,076 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:14:34,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:34,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:14:34,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-10-31 22:14:34,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-10-31 22:14:34,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557255921] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:34,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:34,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-10-31 22:14:34,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472461247] [2024-10-31 22:14:34,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:34,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:14:34,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:14:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:14:34,481 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (63), 6 states have call predecessors, (63), 6 states have return successors, (62), 9 states have call predecessors, (62), 9 states have call successors, (62) [2024-10-31 22:14:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:35,020 INFO L93 Difference]: Finished difference Result 387 states and 415 transitions. [2024-10-31 22:14:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-31 22:14:35,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (63), 6 states have call predecessors, (63), 6 states have return successors, (62), 9 states have call predecessors, (62), 9 states have call successors, (62) Word has length 125 [2024-10-31 22:14:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:35,022 INFO L225 Difference]: With dead ends: 387 [2024-10-31 22:14:35,022 INFO L226 Difference]: Without dead ends: 361 [2024-10-31 22:14:35,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:14:35,024 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 122 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:35,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 133 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:14:35,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-10-31 22:14:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 284. [2024-10-31 22:14:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 172 states have (on average 1.052325581395349) internal successors, (181), 179 states have internal predecessors, (181), 66 states have call successors, (66), 46 states have call predecessors, (66), 45 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2024-10-31 22:14:35,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 311 transitions. [2024-10-31 22:14:35,141 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 311 transitions. Word has length 125 [2024-10-31 22:14:35,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:35,142 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 311 transitions. [2024-10-31 22:14:35,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (63), 6 states have call predecessors, (63), 6 states have return successors, (62), 9 states have call predecessors, (62), 9 states have call successors, (62) [2024-10-31 22:14:35,142 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 311 transitions. [2024-10-31 22:14:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-10-31 22:14:35,144 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:35,144 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:35,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:35,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:35,345 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:35,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash 36255119, now seen corresponding path program 1 times [2024-10-31 22:14:35,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:35,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607795619] [2024-10-31 22:14:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:35,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:14:35,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371594323] [2024-10-31 22:14:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:35,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:35,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:35,392 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:35,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:14:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:35,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-31 22:14:35,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2024-10-31 22:14:35,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:36,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:36,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607795619] [2024-10-31 22:14:36,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:14:36,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371594323] [2024-10-31 22:14:36,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371594323] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:36,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:14:36,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-31 22:14:36,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794213115] [2024-10-31 22:14:36,100 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:36,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:14:36,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:36,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:14:36,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:14:36,101 INFO L87 Difference]: Start difference. First operand 284 states and 311 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2024-10-31 22:14:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:36,525 INFO L93 Difference]: Finished difference Result 295 states and 322 transitions. [2024-10-31 22:14:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:14:36,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 133 [2024-10-31 22:14:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:36,528 INFO L225 Difference]: With dead ends: 295 [2024-10-31 22:14:36,528 INFO L226 Difference]: Without dead ends: 287 [2024-10-31 22:14:36,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:14:36,529 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:36,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 241 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:14:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-10-31 22:14:36,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2024-10-31 22:14:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 175 states have (on average 1.0457142857142858) internal successors, (183), 181 states have internal predecessors, (183), 65 states have call successors, (65), 47 states have call predecessors, (65), 46 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2024-10-31 22:14:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 311 transitions. [2024-10-31 22:14:36,666 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 311 transitions. Word has length 133 [2024-10-31 22:14:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:36,667 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 311 transitions. [2024-10-31 22:14:36,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2024-10-31 22:14:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 311 transitions. [2024-10-31 22:14:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-10-31 22:14:36,669 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:36,669 INFO L215 NwaCegarLoop]: trace histogram [29, 28, 28, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:36,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-31 22:14:36,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:36,870 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:14:36,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:36,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1802004917, now seen corresponding path program 2 times [2024-10-31 22:14:36,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:36,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948896036] [2024-10-31 22:14:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:36,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:14:36,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171677270] [2024-10-31 22:14:36,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:14:36,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:36,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:36,992 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:36,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93a4aec-9653-46f9-b9ea-e32e7d8db3e9/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:14:37,115 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:14:37,116 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:37,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-31 22:14:37,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 115 proven. 102 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2024-10-31 22:14:37,719 INFO L311 TraceCheckSpWp]: Computing backward predicates...