./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu --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 fe22a831ab045bcc67da4505e3ba36b6f549cf1239b349bc9f8fd22458d7fbac --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:06:56,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:06:56,926 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:06:56,935 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:06:56,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:06:56,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:06:56,981 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:06:56,982 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:06:56,984 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:06:56,989 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:06:56,991 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:06:56,992 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:06:56,992 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:06:56,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:06:56,995 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:06:56,996 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:06:56,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:06:56,997 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:06:56,997 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:06:56,998 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:06:56,998 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:06:56,999 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:06:57,000 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:06:57,001 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:06:57,002 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:06:57,003 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:06:57,003 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:06:57,004 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:06:57,004 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:57,005 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:06:57,006 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:06:57,007 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:06:57,007 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:06:57,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:06:57,008 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:06:57,008 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:06:57,009 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:06:57,027 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:06:57,027 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:06:57,027 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_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe22a831ab045bcc67da4505e3ba36b6f549cf1239b349bc9f8fd22458d7fbac [2023-11-19 08:06:57,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:06:57,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:06:57,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:06:57,400 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:06:57,401 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:06:57,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2023-11-19 08:07:00,562 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:07:00,779 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:07:00,780 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2023-11-19 08:07:00,789 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/data/083f2bd33/415e34ebd1bc4ba79d82803d68c80e92/FLAG80c6e8da5 [2023-11-19 08:07:00,806 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/data/083f2bd33/415e34ebd1bc4ba79d82803d68c80e92 [2023-11-19 08:07:00,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:07:00,811 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:07:00,812 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:07:00,813 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:07:00,825 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:07:00,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:07:00" (1/1) ... [2023-11-19 08:07:00,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@efda07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:00, skipping insertion in model container [2023-11-19 08:07:00,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:07:00" (1/1) ... [2023-11-19 08:07:00,855 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:07:01,086 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c[1175,1188] [2023-11-19 08:07:01,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:07:01,124 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:07:01,140 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c[1175,1188] [2023-11-19 08:07:01,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:07:01,174 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:07:01,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01 WrapperNode [2023-11-19 08:07:01,175 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:07:01,177 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:07:01,177 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:07:01,177 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:07:01,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,195 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,220 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2023-11-19 08:07:01,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:07:01,221 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:07:01,222 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:07:01,222 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:07:01,232 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,243 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,243 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,246 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,249 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,250 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,251 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,262 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:07:01,263 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:07:01,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:07:01,264 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:07:01,264 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (1/1) ... [2023-11-19 08:07:01,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:07:01,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:01,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:07:01,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:07:01,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:07:01,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:07:01,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:07:01,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:07:01,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 08:07:01,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 08:07:01,430 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:07:01,433 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:07:01,617 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:07:01,625 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:07:01,625 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:07:01,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:07:01 BoogieIcfgContainer [2023-11-19 08:07:01,629 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:07:01,650 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:07:01,651 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:07:01,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:07:01,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:07:00" (1/3) ... [2023-11-19 08:07:01,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3b2766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:07:01, skipping insertion in model container [2023-11-19 08:07:01,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:01" (2/3) ... [2023-11-19 08:07:01,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3b2766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:07:01, skipping insertion in model container [2023-11-19 08:07:01,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:07:01" (3/3) ... [2023-11-19 08:07:01,659 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound5.c [2023-11-19 08:07:01,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:07:01,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:07:01,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:07:01,786 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50bd8259, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:07:01,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:07:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 08:07:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 08:07:01,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:01,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:01,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:01,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash -572597424, now seen corresponding path program 1 times [2023-11-19 08:07:01,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:01,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055779632] [2023-11-19 08:07:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:01,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:02,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:02,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055779632] [2023-11-19 08:07:02,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:07:02,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856705487] [2023-11-19 08:07:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:02,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:02,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:02,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:02,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:07:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:02,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:07:02,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:02,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:02,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856705487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:02,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:02,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:07:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068070031] [2023-11-19 08:07:02,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:02,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:07:02,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:07:02,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:07:02,196 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:02,219 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2023-11-19 08:07:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:07:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 08:07:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:02,228 INFO L225 Difference]: With dead ends: 39 [2023-11-19 08:07:02,229 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 08:07:02,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:07:02,253 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2023-11-19 08:07:02,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:07:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 08:07:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 08:07:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 08:07:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-19 08:07:02,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2023-11-19 08:07:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:02,297 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-19 08:07:02,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-19 08:07:02,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 08:07:02,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:02,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:02,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:02,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:07:02,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:02,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:02,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1986366499, now seen corresponding path program 1 times [2023-11-19 08:07:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:02,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698571136] [2023-11-19 08:07:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:02,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:02,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:02,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698571136] [2023-11-19 08:07:02,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:07:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980746803] [2023-11-19 08:07:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:02,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:02,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:02,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:07:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:02,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:07:02,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:02,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:02,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980746803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:02,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:02,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:02,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081323587] [2023-11-19 08:07:02,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:02,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:07:02,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:07:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:02,747 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:02,768 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-19 08:07:02,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:07:02,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 08:07:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:02,770 INFO L225 Difference]: With dead ends: 26 [2023-11-19 08:07:02,770 INFO L226 Difference]: Without dead ends: 19 [2023-11-19 08:07:02,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:02,773 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:02,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:07:02,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-19 08:07:02,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-19 08:07:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 08:07:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-19 08:07:02,780 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2023-11-19 08:07:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:02,780 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-19 08:07:02,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-19 08:07:02,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 08:07:02,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:02,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:02,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:02,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:02,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:02,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1984579039, now seen corresponding path program 1 times [2023-11-19 08:07:02,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:02,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584932355] [2023-11-19 08:07:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:02,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:03,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:03,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563039202] [2023-11-19 08:07:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:03,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:03,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:03,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:03,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:07:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:03,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:07:03,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:03,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:03,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:03,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584932355] [2023-11-19 08:07:03,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:03,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563039202] [2023-11-19 08:07:03,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563039202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:03,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:03,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:07:03,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697508268] [2023-11-19 08:07:03,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:03,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:07:03,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:03,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:07:03,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:07:03,177 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:03,239 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-11-19 08:07:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:07:03,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 08:07:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:03,241 INFO L225 Difference]: With dead ends: 30 [2023-11-19 08:07:03,241 INFO L226 Difference]: Without dead ends: 28 [2023-11-19 08:07:03,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:07:03,244 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 48 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 [2023-11-19 08:07:03,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:07:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-19 08:07:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-11-19 08:07:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 08:07:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-19 08:07:03,256 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2023-11-19 08:07:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:03,257 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-19 08:07:03,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-19 08:07:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 08:07:03,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:03,259 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:03,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:03,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:03,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:03,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:03,469 INFO L85 PathProgramCache]: Analyzing trace with hash 845350648, now seen corresponding path program 1 times [2023-11-19 08:07:03,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:03,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555115360] [2023-11-19 08:07:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:03,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:03,486 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:03,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890699954] [2023-11-19 08:07:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:03,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:03,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:03,489 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:03,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:07:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:03,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:07:03,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:03,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:03,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:03,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555115360] [2023-11-19 08:07:03,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:03,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890699954] [2023-11-19 08:07:03,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890699954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:03,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:03,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-11-19 08:07:03,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104917018] [2023-11-19 08:07:03,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:03,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:07:03,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:03,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:07:03,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:07:03,948 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 08:07:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:04,073 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-11-19 08:07:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:07:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-19 08:07:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:04,076 INFO L225 Difference]: With dead ends: 40 [2023-11-19 08:07:04,077 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 08:07:04,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:07:04,079 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:04,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 90 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 08:07:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2023-11-19 08:07:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 08:07:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-11-19 08:07:04,090 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2023-11-19 08:07:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:04,090 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-11-19 08:07:04,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 08:07:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-11-19 08:07:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 08:07:04,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:04,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:04,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:04,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 08:07:04,313 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:04,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:04,314 INFO L85 PathProgramCache]: Analyzing trace with hash 905454657, now seen corresponding path program 1 times [2023-11-19 08:07:04,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:04,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977397309] [2023-11-19 08:07:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:04,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:04,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:04,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834057441] [2023-11-19 08:07:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:04,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:04,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:04,340 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:04,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:07:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:04,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:07:04,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:04,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:04,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:04,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977397309] [2023-11-19 08:07:04,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:04,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834057441] [2023-11-19 08:07:04,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834057441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:04,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:04,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-19 08:07:04,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740688636] [2023-11-19 08:07:04,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:04,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:07:04,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:07:04,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:07:04,529 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 08:07:04,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:04,640 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2023-11-19 08:07:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:07:04,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-19 08:07:04,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:04,642 INFO L225 Difference]: With dead ends: 60 [2023-11-19 08:07:04,642 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 08:07:04,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:07:04,644 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:04,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:07:04,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 08:07:04,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-11-19 08:07:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 08:07:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-11-19 08:07:04,662 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 20 [2023-11-19 08:07:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:04,663 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-11-19 08:07:04,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 08:07:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-11-19 08:07:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 08:07:04,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:04,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:04,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:04,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:04,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:04,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash 907242117, now seen corresponding path program 1 times [2023-11-19 08:07:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:04,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017295441] [2023-11-19 08:07:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:04,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:04,897 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:04,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302205235] [2023-11-19 08:07:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:04,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:04,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:04,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:07:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:04,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 08:07:04,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:05,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:07,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:07,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017295441] [2023-11-19 08:07:07,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:07,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302205235] [2023-11-19 08:07:07,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302205235] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:07:07,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:07:07,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-19 08:07:07,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727650528] [2023-11-19 08:07:07,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:07,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:07:07,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:07,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:07:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:07:07,226 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 08:07:07,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:07,699 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2023-11-19 08:07:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:07:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-19 08:07:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:07,701 INFO L225 Difference]: With dead ends: 88 [2023-11-19 08:07:07,701 INFO L226 Difference]: Without dead ends: 86 [2023-11-19 08:07:07,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:07:07,703 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:07,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:07:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-19 08:07:07,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2023-11-19 08:07:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 67 states have internal predecessors, (78), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 08:07:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2023-11-19 08:07:07,721 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 20 [2023-11-19 08:07:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:07,722 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2023-11-19 08:07:07,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 08:07:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2023-11-19 08:07:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 08:07:07,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:07,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:07,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:07,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:07:07,950 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:07,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:07,950 INFO L85 PathProgramCache]: Analyzing trace with hash 97895491, now seen corresponding path program 1 times [2023-11-19 08:07:07,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:07,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286653394] [2023-11-19 08:07:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:07,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:07,968 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:07,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123714958] [2023-11-19 08:07:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:07,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:07,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:07,972 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:07,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:07:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:08,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 08:07:08,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:08,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:09,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:09,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286653394] [2023-11-19 08:07:09,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:09,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123714958] [2023-11-19 08:07:09,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123714958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:09,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:09,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2023-11-19 08:07:09,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034507261] [2023-11-19 08:07:09,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:09,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:07:09,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:09,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:07:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:07:09,032 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 08:07:09,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:09,580 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2023-11-19 08:07:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:07:09,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-19 08:07:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:09,587 INFO L225 Difference]: With dead ends: 110 [2023-11-19 08:07:09,587 INFO L226 Difference]: Without dead ends: 108 [2023-11-19 08:07:09,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2023-11-19 08:07:09,589 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:09,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 110 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:07:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-19 08:07:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 92. [2023-11-19 08:07:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 08:07:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2023-11-19 08:07:09,609 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 20 [2023-11-19 08:07:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:09,609 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2023-11-19 08:07:09,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 08:07:09,609 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2023-11-19 08:07:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 08:07:09,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:09,611 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:09,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:09,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:09,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:09,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash 103630759, now seen corresponding path program 1 times [2023-11-19 08:07:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:09,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593291236] [2023-11-19 08:07:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:09,840 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:09,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573080076] [2023-11-19 08:07:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:09,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:09,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:09,842 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:09,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:07:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:09,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 08:07:09,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:07:10,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:07:18,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:18,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593291236] [2023-11-19 08:07:18,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:18,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573080076] [2023-11-19 08:07:18,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573080076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:18,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:18,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2023-11-19 08:07:18,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523398812] [2023-11-19 08:07:18,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 08:07:18,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:18,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 08:07:18,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-19 08:07:18,082 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 08:07:20,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 08:07:22,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 08:07:24,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 08:07:31,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 08:07:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:33,731 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2023-11-19 08:07:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 08:07:33,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-11-19 08:07:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:33,734 INFO L225 Difference]: With dead ends: 131 [2023-11-19 08:07:33,734 INFO L226 Difference]: Without dead ends: 129 [2023-11-19 08:07:33,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=102, Invalid=359, Unknown=1, NotChecked=0, Total=462 [2023-11-19 08:07:33,735 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:33,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 160 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 195 Invalid, 3 Unknown, 0 Unchecked, 9.4s Time] [2023-11-19 08:07:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-19 08:07:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2023-11-19 08:07:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 105 states have internal predecessors, (117), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 08:07:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142 transitions. [2023-11-19 08:07:33,768 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 142 transitions. Word has length 30 [2023-11-19 08:07:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:33,768 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 142 transitions. [2023-11-19 08:07:33,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 08:07:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 142 transitions. [2023-11-19 08:07:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 08:07:33,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:33,771 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:33,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:33,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:33,989 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:33,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash -667620151, now seen corresponding path program 2 times [2023-11-19 08:07:33,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:33,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149294848] [2023-11-19 08:07:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:33,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:34,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:34,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619549338] [2023-11-19 08:07:34,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:07:34,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:34,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:34,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:34,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:07:34,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:07:34,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:07:34,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 08:07:34,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 08:07:34,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 08:07:35,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:35,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149294848] [2023-11-19 08:07:35,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619549338] [2023-11-19 08:07:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619549338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:35,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:35,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2023-11-19 08:07:35,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713815560] [2023-11-19 08:07:35,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:35,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 08:07:35,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:35,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 08:07:35,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:07:35,804 INFO L87 Difference]: Start difference. First operand 126 states and 142 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 08:07:38,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:38,753 INFO L93 Difference]: Finished difference Result 211 states and 253 transitions. [2023-11-19 08:07:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 08:07:38,754 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2023-11-19 08:07:38,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:38,757 INFO L225 Difference]: With dead ends: 211 [2023-11-19 08:07:38,757 INFO L226 Difference]: Without dead ends: 209 [2023-11-19 08:07:38,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2023-11-19 08:07:38,759 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:38,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 230 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 08:07:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-19 08:07:38,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 143. [2023-11-19 08:07:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 113 states have (on average 1.168141592920354) internal successors, (132), 120 states have internal predecessors, (132), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (17), 11 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-19 08:07:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 167 transitions. [2023-11-19 08:07:38,804 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 167 transitions. Word has length 40 [2023-11-19 08:07:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:38,805 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 167 transitions. [2023-11-19 08:07:38,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 08:07:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 167 transitions. [2023-11-19 08:07:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 08:07:38,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:38,808 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:38,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-19 08:07:39,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:39,033 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:39,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash -957536403, now seen corresponding path program 2 times [2023-11-19 08:07:39,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:39,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865807256] [2023-11-19 08:07:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:39,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:39,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:39,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040024826] [2023-11-19 08:07:39,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:07:39,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:39,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:39,061 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:39,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:07:39,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:07:39,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:07:39,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:07:39,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:39,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 08:07:39,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:39,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865807256] [2023-11-19 08:07:39,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:39,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040024826] [2023-11-19 08:07:39,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040024826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:39,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:39,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2023-11-19 08:07:39,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245581167] [2023-11-19 08:07:39,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:39,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:07:39,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:07:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:07:39,322 INFO L87 Difference]: Start difference. First operand 143 states and 167 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 08:07:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:39,413 INFO L93 Difference]: Finished difference Result 176 states and 202 transitions. [2023-11-19 08:07:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:07:39,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2023-11-19 08:07:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:39,415 INFO L225 Difference]: With dead ends: 176 [2023-11-19 08:07:39,415 INFO L226 Difference]: Without dead ends: 169 [2023-11-19 08:07:39,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:07:39,417 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:39,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:07:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-19 08:07:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-11-19 08:07:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 141 states have internal predecessors, (153), 19 states have call successors, (19), 14 states have call predecessors, (19), 14 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-19 08:07:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2023-11-19 08:07:39,451 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 50 [2023-11-19 08:07:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:39,451 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2023-11-19 08:07:39,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 08:07:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2023-11-19 08:07:39,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 08:07:39,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:39,454 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:39,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:39,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:39,668 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:39,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1003105367, now seen corresponding path program 2 times [2023-11-19 08:07:39,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:39,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551948266] [2023-11-19 08:07:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:39,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:39,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:39,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446464980] [2023-11-19 08:07:39,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:07:39,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:39,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:39,713 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:39,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7e44bba-4465-4086-a8bb-1dc88a24593c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:07:39,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:07:39,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:07:39,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 08:07:39,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 08:07:42,234 INFO L327 TraceCheckSpWp]: Computing backward predicates...