./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.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_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/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_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/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_34775db0-5a99-42a3-b22f-97ae2aaed668/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 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:11:16,253 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:11:16,346 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:11:16,353 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:11:16,355 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:11:16,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:11:16,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:11:16,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:11:16,378 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:11:16,378 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:11:16,379 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:11:16,379 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:11:16,380 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:11:16,380 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:11:16,381 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:11:16,381 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:11:16,381 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:11:16,382 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:11:16,382 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:11:16,382 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:11:16,382 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:11:16,383 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:11:16,383 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:11:16,384 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:11:16,384 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:11:16,384 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:11:16,385 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:11:16,385 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:11:16,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:11:16,386 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:11:16,386 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:11:16,386 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:11:16,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:16,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:11:16,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:11:16,388 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:11:16,388 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:11:16,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:11:16,389 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:11:16,389 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:11:16,389 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:11:16,390 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:11:16,390 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_34775db0-5a99-42a3-b22f-97ae2aaed668/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 [2024-10-31 22:11:16,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:11:16,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:11:16,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:11:16,723 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:11:16,724 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:11:16,725 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c Unable to find full path for "g++" [2024-10-31 22:11:18,968 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:11:19,215 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:11:19,215 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-10-31 22:11:19,225 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/data/fcbf917eb/dd21c2433bd8491c9a70abab17aeddf7/FLAGf9a016a01 [2024-10-31 22:11:19,247 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/data/fcbf917eb/dd21c2433bd8491c9a70abab17aeddf7 [2024-10-31 22:11:19,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:11:19,252 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:11:19,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:19,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:11:19,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:11:19,262 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@387e7e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19, skipping insertion in model container [2024-10-31 22:11:19,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,294 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:11:19,518 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_34775db0-5a99-42a3-b22f-97ae2aaed668/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2024-10-31 22:11:19,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:19,547 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:11:19,557 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_34775db0-5a99-42a3-b22f-97ae2aaed668/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2024-10-31 22:11:19,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:19,585 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:11:19,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19 WrapperNode [2024-10-31 22:11:19,586 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:19,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:19,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:11:19,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:11:19,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,602 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,618 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2024-10-31 22:11:19,619 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:19,619 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:11:19,620 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:11:19,620 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:11:19,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,633 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,646 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 22:11:19,646 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,646 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,649 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,653 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,655 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,657 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:11:19,658 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:11:19,658 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:11:19,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:11:19,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (1/1) ... [2024-10-31 22:11:19,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:19,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:19,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:11:19,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:11:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:11:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-31 22:11:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-31 22:11:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:11:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:11:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:11:19,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 22:11:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 22:11:19,823 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:11:19,825 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:11:20,073 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-31 22:11:20,073 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:11:20,088 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:11:20,088 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:11:20,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:20 BoogieIcfgContainer [2024-10-31 22:11:20,089 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:11:20,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:11:20,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:11:20,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:11:20,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:11:19" (1/3) ... [2024-10-31 22:11:20,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc6af13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:20, skipping insertion in model container [2024-10-31 22:11:20,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:19" (2/3) ... [2024-10-31 22:11:20,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc6af13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:20, skipping insertion in model container [2024-10-31 22:11:20,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:20" (3/3) ... [2024-10-31 22:11:20,100 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2024-10-31 22:11:20,120 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:11:20,120 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:11:20,207 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:11:20,217 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;@59a3465f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:11:20,217 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:11:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 22:11:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 22:11:20,235 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:20,236 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:20,237 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:20,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2024-10-31 22:11:20,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:20,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960614566] [2024-10-31 22:11:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:20,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:20,457 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:11:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:20,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:11:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:20,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:11:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:20,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:11:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:11:20,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:20,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960614566] [2024-10-31 22:11:20,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960614566] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:20,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:20,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:20,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337890738] [2024-10-31 22:11:20,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:20,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:11:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:11:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:11:20,556 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:11:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:20,577 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2024-10-31 22:11:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:11:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-10-31 22:11:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:20,587 INFO L225 Difference]: With dead ends: 67 [2024-10-31 22:11:20,588 INFO L226 Difference]: Without dead ends: 31 [2024-10-31 22:11:20,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 22:11:20,598 INFO L432 NwaCegarLoop]: 44 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, 44 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 22:11:20,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:11:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-31 22:11:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-31 22:11:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:11:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-10-31 22:11:20,654 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2024-10-31 22:11:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:20,654 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-10-31 22:11:20,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:11:20,655 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-10-31 22:11:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-31 22:11:20,657 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:20,657 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:20,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:11:20,658 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:20,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2024-10-31 22:11:20,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:20,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082664324] [2024-10-31 22:11:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:20,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:20,991 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:11:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:20,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:11:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:21,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:11:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:21,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:11:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:11:21,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:21,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082664324] [2024-10-31 22:11:21,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082664324] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:21,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:21,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:11:21,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266962774] [2024-10-31 22:11:21,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:21,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:11:21,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:21,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:11:21,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:11:21,056 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 22:11:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:21,218 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2024-10-31 22:11:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-10-31 22:11:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:21,220 INFO L225 Difference]: With dead ends: 50 [2024-10-31 22:11:21,220 INFO L226 Difference]: Without dead ends: 43 [2024-10-31 22:11:21,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:11:21,222 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:21,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:11:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-31 22:11:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-10-31 22:11:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:11:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-10-31 22:11:21,239 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2024-10-31 22:11:21,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:21,239 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-10-31 22:11:21,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 22:11:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-10-31 22:11:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 22:11:21,241 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:21,241 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:21,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:11:21,242 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:21,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:21,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2024-10-31 22:11:21,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:21,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973116695] [2024-10-31 22:11:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:21,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:21,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913418716] [2024-10-31 22:11:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:21,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:21,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:21,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:21,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:11:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:21,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:11:21,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:11:21,634 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:21,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:21,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973116695] [2024-10-31 22:11:21,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:11:21,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913418716] [2024-10-31 22:11:21,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913418716] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:21,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:21,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:11:21,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115974604] [2024-10-31 22:11:21,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:21,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:21,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:21,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:21,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:21,642 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 22:11:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:21,726 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-10-31 22:11:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-10-31 22:11:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:21,728 INFO L225 Difference]: With dead ends: 49 [2024-10-31 22:11:21,728 INFO L226 Difference]: Without dead ends: 47 [2024-10-31 22:11:21,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 22:11:21,730 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:21,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:11:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-31 22:11:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-31 22:11:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-31 22:11:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2024-10-31 22:11:21,755 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2024-10-31 22:11:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:21,755 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2024-10-31 22:11:21,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 22:11:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2024-10-31 22:11:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 22:11:21,756 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:21,757 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:21,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:11:21,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:21,963 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:21,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:21,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2024-10-31 22:11:21,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:21,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393810849] [2024-10-31 22:11:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:21,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:22,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:11:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:22,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:11:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:22,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:11:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:22,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:11:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:11:22,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:22,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393810849] [2024-10-31 22:11:22,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393810849] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:22,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484503419] [2024-10-31 22:11:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:22,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:22,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:22,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:22,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:11:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:22,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:11:22,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:11:22,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:11:22,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484503419] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:22,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:22,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-10-31 22:11:22,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662542712] [2024-10-31 22:11:22,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:22,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:11:22,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:11:22,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:11:22,655 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:11:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:22,947 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2024-10-31 22:11:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:11:22,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-10-31 22:11:22,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:22,949 INFO L225 Difference]: With dead ends: 99 [2024-10-31 22:11:22,950 INFO L226 Difference]: Without dead ends: 92 [2024-10-31 22:11:22,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:11:22,954 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 67 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:22,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 234 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:11:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-31 22:11:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2024-10-31 22:11:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-31 22:11:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2024-10-31 22:11:22,974 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2024-10-31 22:11:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:22,974 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2024-10-31 22:11:22,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:11:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2024-10-31 22:11:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 22:11:22,976 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:22,976 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:22,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:11:23,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:23,177 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:23,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:23,178 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2024-10-31 22:11:23,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:23,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912339901] [2024-10-31 22:11:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:23,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:23,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228635068] [2024-10-31 22:11:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:23,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:23,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:23,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:23,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:11:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:23,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:11:23,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:11:23,444 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:23,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:23,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912339901] [2024-10-31 22:11:23,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:11:23,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228635068] [2024-10-31 22:11:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228635068] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:23,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:23,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:11:23,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796633325] [2024-10-31 22:11:23,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:23,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:23,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:23,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:23,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:23,450 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:11:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:23,540 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2024-10-31 22:11:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-10-31 22:11:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:23,543 INFO L225 Difference]: With dead ends: 75 [2024-10-31 22:11:23,543 INFO L226 Difference]: Without dead ends: 73 [2024-10-31 22:11:23,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 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 22:11:23,544 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:23,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:11:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-31 22:11:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-10-31 22:11:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-31 22:11:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2024-10-31 22:11:23,577 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2024-10-31 22:11:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:23,578 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2024-10-31 22:11:23,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:11:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2024-10-31 22:11:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 22:11:23,582 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:23,582 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:23,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:11:23,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:23,783 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:23,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:23,784 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2024-10-31 22:11:23,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:23,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880201271] [2024-10-31 22:11:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:23,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:23,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136976111] [2024-10-31 22:11:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:23,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:23,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:23,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:11:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:23,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:11:23,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:11:24,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:11:24,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:24,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880201271] [2024-10-31 22:11:24,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:11:24,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136976111] [2024-10-31 22:11:24,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136976111] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:24,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:11:24,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-10-31 22:11:24,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797078779] [2024-10-31 22:11:24,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:24,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:11:24,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:24,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:11:24,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:11:24,209 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 22:11:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:24,477 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2024-10-31 22:11:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-10-31 22:11:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:24,479 INFO L225 Difference]: With dead ends: 107 [2024-10-31 22:11:24,479 INFO L226 Difference]: Without dead ends: 105 [2024-10-31 22:11:24,480 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:11:24,480 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:24,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 235 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:11:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-31 22:11:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-10-31 22:11:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-31 22:11:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2024-10-31 22:11:24,518 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2024-10-31 22:11:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:24,518 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2024-10-31 22:11:24,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 22:11:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2024-10-31 22:11:24,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-31 22:11:24,520 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:24,520 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:24,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:11:24,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:24,720 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:24,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2024-10-31 22:11:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:24,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945099388] [2024-10-31 22:11:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:24,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:24,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281191304] [2024-10-31 22:11:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:24,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:24,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:24,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:24,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:11:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:24,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:11:24,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-31 22:11:24,855 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:24,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:24,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945099388] [2024-10-31 22:11:24,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:11:24,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281191304] [2024-10-31 22:11:24,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281191304] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:24,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:24,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:11:24,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468417403] [2024-10-31 22:11:24,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:24,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:24,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:24,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:24,857 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 22:11:24,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:24,967 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2024-10-31 22:11:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:24,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-10-31 22:11:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:24,974 INFO L225 Difference]: With dead ends: 147 [2024-10-31 22:11:24,974 INFO L226 Difference]: Without dead ends: 145 [2024-10-31 22:11:24,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 22:11:24,975 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:24,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:11:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-10-31 22:11:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2024-10-31 22:11:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-10-31 22:11:25,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2024-10-31 22:11:25,034 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2024-10-31 22:11:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:25,035 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2024-10-31 22:11:25,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 22:11:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2024-10-31 22:11:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-31 22:11:25,036 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:25,036 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:25,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:11:25,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:25,240 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:25,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2024-10-31 22:11:25,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:25,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673245437] [2024-10-31 22:11:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:25,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:25,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378418218] [2024-10-31 22:11:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:25,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:25,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:25,269 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:25,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:11:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:25,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:11:25,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:11:25,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673245437] [2024-10-31 22:11:25,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:11:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378418218] [2024-10-31 22:11:25,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378418218] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:25,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:11:25,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-10-31 22:11:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401223719] [2024-10-31 22:11:25,596 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:25,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:11:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:11:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:11:25,599 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:11:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:25,803 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2024-10-31 22:11:25,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:11:25,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-10-31 22:11:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:25,806 INFO L225 Difference]: With dead ends: 152 [2024-10-31 22:11:25,806 INFO L226 Difference]: Without dead ends: 150 [2024-10-31 22:11:25,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:11:25,808 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 26 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:25,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 209 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:11:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-31 22:11:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-10-31 22:11:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 94 states have internal predecessors, (118), 45 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-10-31 22:11:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 207 transitions. [2024-10-31 22:11:25,849 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 207 transitions. Word has length 43 [2024-10-31 22:11:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:25,850 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 207 transitions. [2024-10-31 22:11:25,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:11:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 207 transitions. [2024-10-31 22:11:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-31 22:11:25,851 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:25,851 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:25,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:11:26,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:26,055 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:26,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2024-10-31 22:11:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428198410] [2024-10-31 22:11:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:26,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:11:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:26,158 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:11:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:26,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:11:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:26,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:11:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:11:26,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:26,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428198410] [2024-10-31 22:11:26,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428198410] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:26,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:26,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:11:26,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634571405] [2024-10-31 22:11:26,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:26,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:26,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:26,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:26,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:26,174 INFO L87 Difference]: Start difference. First operand 147 states and 207 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 22:11:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:26,317 INFO L93 Difference]: Finished difference Result 186 states and 259 transitions. [2024-10-31 22:11:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:26,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2024-10-31 22:11:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:26,319 INFO L225 Difference]: With dead ends: 186 [2024-10-31 22:11:26,319 INFO L226 Difference]: Without dead ends: 130 [2024-10-31 22:11:26,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:11:26,321 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:26,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 160 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:11:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-31 22:11:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-10-31 22:11:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-31 22:11:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2024-10-31 22:11:26,349 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 43 [2024-10-31 22:11:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:26,349 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2024-10-31 22:11:26,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 22:11:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2024-10-31 22:11:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 22:11:26,351 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:26,351 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:26,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:11:26,352 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:26,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2024-10-31 22:11:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:26,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126894844] [2024-10-31 22:11:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:26,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020196573] [2024-10-31 22:11:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:26,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:26,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:26,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:11:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:26,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:11:26,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-31 22:11:26,495 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:26,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:26,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126894844] [2024-10-31 22:11:26,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:11:26,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020196573] [2024-10-31 22:11:26,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020196573] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:26,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:26,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:11:26,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628585949] [2024-10-31 22:11:26,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:26,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:26,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:26,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:26,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:26,497 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 22:11:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:26,595 INFO L93 Difference]: Finished difference Result 180 states and 262 transitions. [2024-10-31 22:11:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:26,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2024-10-31 22:11:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:26,598 INFO L225 Difference]: With dead ends: 180 [2024-10-31 22:11:26,599 INFO L226 Difference]: Without dead ends: 178 [2024-10-31 22:11:26,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 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 22:11:26,601 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:26,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 132 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:11:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-10-31 22:11:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2024-10-31 22:11:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 9 states have call predecessors, (69), 9 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2024-10-31 22:11:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 240 transitions. [2024-10-31 22:11:26,651 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 240 transitions. Word has length 48 [2024-10-31 22:11:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:26,651 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 240 transitions. [2024-10-31 22:11:26,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 22:11:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 240 transitions. [2024-10-31 22:11:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-31 22:11:26,654 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:26,655 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:26,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:11:26,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:26,860 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:26,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:26,861 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2024-10-31 22:11:26,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:26,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434475274] [2024-10-31 22:11:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:26,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:26,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029859747] [2024-10-31 22:11:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:26,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:26,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:26,894 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:26,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:11:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:26,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-31 22:11:26,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-31 22:11:27,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-31 22:11:29,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:29,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434475274] [2024-10-31 22:11:30,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:11:30,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029859747] [2024-10-31 22:11:30,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029859747] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:30,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:11:30,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-31 22:11:30,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589903462] [2024-10-31 22:11:30,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:30,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:11:30,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:30,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:11:30,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:11:30,004 INFO L87 Difference]: Start difference. First operand 166 states and 240 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-10-31 22:11:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:35,185 INFO L93 Difference]: Finished difference Result 445 states and 665 transitions. [2024-10-31 22:11:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-31 22:11:35,186 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 60 [2024-10-31 22:11:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:35,191 INFO L225 Difference]: With dead ends: 445 [2024-10-31 22:11:35,192 INFO L226 Difference]: Without dead ends: 342 [2024-10-31 22:11:35,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-10-31 22:11:35,198 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 167 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:35,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 391 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-10-31 22:11:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-10-31 22:11:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 256. [2024-10-31 22:11:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 150 states have (on average 1.2066666666666668) internal successors, (181), 157 states have internal predecessors, (181), 93 states have call successors, (93), 12 states have call predecessors, (93), 12 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-10-31 22:11:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 366 transitions. [2024-10-31 22:11:35,354 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 366 transitions. Word has length 60 [2024-10-31 22:11:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:35,355 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 366 transitions. [2024-10-31 22:11:35,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-10-31 22:11:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 366 transitions. [2024-10-31 22:11:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-31 22:11:35,356 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:35,357 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:35,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:11:35,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:35,561 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:35,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:35,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2024-10-31 22:11:35,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:35,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353685179] [2024-10-31 22:11:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:35,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:35,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964908881] [2024-10-31 22:11:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:35,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:35,591 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:35,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:11:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:35,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:11:35,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-31 22:11:35,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-10-31 22:11:35,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:35,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353685179] [2024-10-31 22:11:35,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:11:35,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964908881] [2024-10-31 22:11:35,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964908881] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:35,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:11:35,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-31 22:11:35,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045575550] [2024-10-31 22:11:35,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:35,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:35,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:35,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:35,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:11:35,860 INFO L87 Difference]: Start difference. First operand 256 states and 366 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-31 22:11:36,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:36,034 INFO L93 Difference]: Finished difference Result 262 states and 371 transitions. [2024-10-31 22:11:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:36,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2024-10-31 22:11:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:36,037 INFO L225 Difference]: With dead ends: 262 [2024-10-31 22:11:36,037 INFO L226 Difference]: Without dead ends: 260 [2024-10-31 22:11:36,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:11:36,039 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:36,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 127 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:11:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-10-31 22:11:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2024-10-31 22:11:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 153 states have (on average 1.2026143790849673) internal successors, (184), 160 states have internal predecessors, (184), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-10-31 22:11:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 369 transitions. [2024-10-31 22:11:36,176 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 369 transitions. Word has length 70 [2024-10-31 22:11:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:36,176 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 369 transitions. [2024-10-31 22:11:36,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-31 22:11:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 369 transitions. [2024-10-31 22:11:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-31 22:11:36,178 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:36,178 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:36,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:11:36,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:11:36,382 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:36,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2024-10-31 22:11:36,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:36,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202386042] [2024-10-31 22:11:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:36,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123698077] [2024-10-31 22:11:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:36,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:36,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:36,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:36,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:11:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:36,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-31 22:11:36,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-31 22:11:37,160 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-10-31 22:11:37,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:37,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202386042] [2024-10-31 22:11:37,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:11:37,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123698077] [2024-10-31 22:11:37,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123698077] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:37,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:11:37,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-10-31 22:11:37,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630884103] [2024-10-31 22:11:37,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:37,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:11:37,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:11:37,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:11:37,427 INFO L87 Difference]: Start difference. First operand 260 states and 369 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-10-31 22:11:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:41,191 INFO L93 Difference]: Finished difference Result 322 states and 459 transitions. [2024-10-31 22:11:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-31 22:11:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 68 [2024-10-31 22:11:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:41,196 INFO L225 Difference]: With dead ends: 322 [2024-10-31 22:11:41,196 INFO L226 Difference]: Without dead ends: 320 [2024-10-31 22:11:41,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2024-10-31 22:11:41,197 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 114 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:41,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 576 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-10-31 22:11:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-10-31 22:11:41,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 268. [2024-10-31 22:11:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.1949685534591195) internal successors, (190), 166 states have internal predecessors, (190), 93 states have call successors, (93), 15 states have call predecessors, (93), 15 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-10-31 22:11:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 375 transitions. [2024-10-31 22:11:41,366 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 375 transitions. Word has length 68 [2024-10-31 22:11:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:41,367 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 375 transitions. [2024-10-31 22:11:41,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-10-31 22:11:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 375 transitions. [2024-10-31 22:11:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-31 22:11:41,369 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:41,369 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:41,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:11:41,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:11:41,575 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:41,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:41,576 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2024-10-31 22:11:41,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:41,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400651060] [2024-10-31 22:11:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:41,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:11:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:11:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:11:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:11:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-31 22:11:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-31 22:11:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-31 22:11:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-31 22:11:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-31 22:11:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-31 22:11:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-10-31 22:11:41,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:41,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400651060] [2024-10-31 22:11:41,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400651060] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:41,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:41,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:11:41,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462117514] [2024-10-31 22:11:41,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:41,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:41,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:41,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:41,752 INFO L87 Difference]: Start difference. First operand 268 states and 375 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-31 22:11:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:41,997 INFO L93 Difference]: Finished difference Result 459 states and 645 transitions. [2024-10-31 22:11:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:41,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2024-10-31 22:11:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:42,001 INFO L225 Difference]: With dead ends: 459 [2024-10-31 22:11:42,002 INFO L226 Difference]: Without dead ends: 289 [2024-10-31 22:11:42,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 22:11:42,004 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:42,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 121 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:11:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-10-31 22:11:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 277. [2024-10-31 22:11:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 168 states have (on average 1.1964285714285714) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 15 states have call predecessors, (93), 15 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-10-31 22:11:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 386 transitions. [2024-10-31 22:11:42,170 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 386 transitions. Word has length 73 [2024-10-31 22:11:42,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:42,170 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 386 transitions. [2024-10-31 22:11:42,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-31 22:11:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 386 transitions. [2024-10-31 22:11:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-31 22:11:42,171 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:42,172 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:42,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:11:42,172 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:42,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:42,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2024-10-31 22:11:42,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:42,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406063222] [2024-10-31 22:11:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:42,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:42,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824488491] [2024-10-31 22:11:42,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:11:42,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:42,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:42,197 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:42,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:11:42,266 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:11:42,266 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:11:42,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-31 22:11:42,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-10-31 22:11:43,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:45,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:45,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406063222] [2024-10-31 22:11:45,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:11:45,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824488491] [2024-10-31 22:11:45,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824488491] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:45,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:11:45,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-31 22:11:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264964082] [2024-10-31 22:11:45,791 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:45,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:11:45,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:11:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2024-10-31 22:11:45,792 INFO L87 Difference]: Start difference. First operand 277 states and 386 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-31 22:11:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:46,848 INFO L93 Difference]: Finished difference Result 344 states and 469 transitions. [2024-10-31 22:11:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 22:11:46,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2024-10-31 22:11:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:46,851 INFO L225 Difference]: With dead ends: 344 [2024-10-31 22:11:46,851 INFO L226 Difference]: Without dead ends: 342 [2024-10-31 22:11:46,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2024-10-31 22:11:46,854 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:46,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 429 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 22:11:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-10-31 22:11:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 332. [2024-10-31 22:11:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 202 states have (on average 1.188118811881188) internal successors, (240), 203 states have internal predecessors, (240), 109 states have call successors, (109), 20 states have call predecessors, (109), 20 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2024-10-31 22:11:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 457 transitions. [2024-10-31 22:11:46,989 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 457 transitions. Word has length 73 [2024-10-31 22:11:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:46,989 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 457 transitions. [2024-10-31 22:11:46,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-31 22:11:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 457 transitions. [2024-10-31 22:11:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-10-31 22:11:46,991 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:46,991 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:47,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-31 22:11:47,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:11:47,191 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:47,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2024-10-31 22:11:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:47,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770073586] [2024-10-31 22:11:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:11:47,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970427349] [2024-10-31 22:11:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:47,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:47,215 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:47,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34775db0-5a99-42a3-b22f-97ae2aaed668/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:11:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:47,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-10-31 22:11:47,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-10-31 22:11:48,767 INFO L311 TraceCheckSpWp]: Computing backward predicates...