./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya --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 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:46:56,001 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:46:56,069 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:46:56,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:46:56,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:46:56,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:46:56,104 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:46:56,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:46:56,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:46:56,106 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:46:56,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:46:56,118 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:46:56,118 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:46:56,119 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:46:56,119 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:46:56,120 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:46:56,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:46:56,121 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:46:56,121 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:46:56,122 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:46:56,122 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:46:56,123 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:46:56,123 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:46:56,124 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:46:56,124 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:46:56,125 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:46:56,125 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:46:56,126 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:46:56,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:46:56,126 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:46:56,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:46:56,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:46:56,128 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:46:56,128 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:46:56,128 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:46:56,129 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:46:56,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:46:56,129 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:46:56,130 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:46:56,130 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:46:56,131 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:46:56,131 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:46:56,131 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_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c [2023-11-29 03:46:56,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:46:56,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:46:56,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:46:56,410 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:46:56,412 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:46:56,413 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-crafted/zero_sum_const2.c [2023-11-29 03:46:59,166 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:46:59,359 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:46:59,359 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/sv-benchmarks/c/array-crafted/zero_sum_const2.c [2023-11-29 03:46:59,365 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/data/f61997af1/2af2b1f3553c4982a8a234ab354479eb/FLAGb32785b94 [2023-11-29 03:46:59,379 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/data/f61997af1/2af2b1f3553c4982a8a234ab354479eb [2023-11-29 03:46:59,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:46:59,383 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:46:59,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:46:59,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:46:59,390 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:46:59,390 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,391 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c0642eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59, skipping insertion in model container [2023-11-29 03:46:59,392 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,413 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:46:59,543 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_64d8ea65-98cf-468d-af51-44f4e82bc717/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2023-11-29 03:46:59,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:46:59,573 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:46:59,588 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_64d8ea65-98cf-468d-af51-44f4e82bc717/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2023-11-29 03:46:59,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:46:59,609 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:46:59,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59 WrapperNode [2023-11-29 03:46:59,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:46:59,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:46:59,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:46:59,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:46:59,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,626 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,645 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-11-29 03:46:59,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:46:59,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:46:59,646 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:46:59,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:46:59,656 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,658 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,671 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-29 03:46:59,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,671 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,677 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,682 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,683 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,685 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:46:59,686 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:46:59,686 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:46:59,686 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:46:59,687 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (1/1) ... [2023-11-29 03:46:59,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:46:59,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:59,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:46:59,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:46:59,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:46:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:46:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:46:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:46:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:46:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 03:46:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:46:59,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:46:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:46:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:46:59,822 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:46:59,825 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:46:59,967 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:46:59,999 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:46:59,999 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 03:46:59,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:46:59 BoogieIcfgContainer [2023-11-29 03:46:59,999 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:47:00,003 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:47:00,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:47:00,006 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:47:00,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:46:59" (1/3) ... [2023-11-29 03:47:00,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b6d3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:47:00, skipping insertion in model container [2023-11-29 03:47:00,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:59" (2/3) ... [2023-11-29 03:47:00,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b6d3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:47:00, skipping insertion in model container [2023-11-29 03:47:00,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:46:59" (3/3) ... [2023-11-29 03:47:00,009 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2023-11-29 03:47:00,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:47:00,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:47:00,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:47:00,081 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;@cbdc3ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:47:00,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:47:00,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 03:47:00,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:00,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:00,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:00,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:00,099 INFO L85 PathProgramCache]: Analyzing trace with hash 618169066, now seen corresponding path program 1 times [2023-11-29 03:47:00,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:00,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221603074] [2023-11-29 03:47:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:00,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:00,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221603074] [2023-11-29 03:47:00,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221603074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:47:00,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:47:00,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:47:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595361297] [2023-11-29 03:47:00,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:47:00,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:47:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:00,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:47:00,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:47:00,306 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:00,335 INFO L93 Difference]: Finished difference Result 33 states and 52 transitions. [2023-11-29 03:47:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:47:00,338 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 03:47:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:00,344 INFO L225 Difference]: With dead ends: 33 [2023-11-29 03:47:00,344 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 03:47:00,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:47:00,349 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:00,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:47:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 03:47:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-29 03:47:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-11-29 03:47:00,375 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 14 [2023-11-29 03:47:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:00,376 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-11-29 03:47:00,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-11-29 03:47:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 03:47:00,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:00,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:00,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:47:00,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:00,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash -156327248, now seen corresponding path program 1 times [2023-11-29 03:47:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:00,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257313465] [2023-11-29 03:47:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:00,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:00,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:00,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257313465] [2023-11-29 03:47:00,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257313465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:47:00,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:47:00,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:47:00,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795157066] [2023-11-29 03:47:00,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:47:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:47:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:47:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:47:00,514 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:00,563 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-11-29 03:47:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:47:00,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 03:47:00,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:00,565 INFO L225 Difference]: With dead ends: 28 [2023-11-29 03:47:00,565 INFO L226 Difference]: Without dead ends: 16 [2023-11-29 03:47:00,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:47:00,567 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:00,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:47:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-29 03:47:00,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-29 03:47:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-29 03:47:00,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2023-11-29 03:47:00,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:00,573 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-29 03:47:00,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-29 03:47:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 03:47:00,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:00,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:00,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:47:00,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:00,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2062722695, now seen corresponding path program 1 times [2023-11-29 03:47:00,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:00,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991072918] [2023-11-29 03:47:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:47:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:00,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991072918] [2023-11-29 03:47:00,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991072918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:47:00,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:47:00,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:47:00,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849547313] [2023-11-29 03:47:00,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:47:00,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:47:00,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:00,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:47:00,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:47:00,667 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:00,712 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2023-11-29 03:47:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:47:00,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 03:47:00,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:00,714 INFO L225 Difference]: With dead ends: 30 [2023-11-29 03:47:00,714 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 03:47:00,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:47:00,716 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:00,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:47:00,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 03:47:00,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-29 03:47:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-29 03:47:00,722 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2023-11-29 03:47:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:00,723 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-29 03:47:00,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-29 03:47:00,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 03:47:00,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:00,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:00,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 03:47:00,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:00,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:00,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1688113859, now seen corresponding path program 1 times [2023-11-29 03:47:00,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:00,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996702438] [2023-11-29 03:47:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:47:00,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:00,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996702438] [2023-11-29 03:47:00,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996702438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:00,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289987202] [2023-11-29 03:47:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:00,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:00,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:00,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:00,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:47:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:00,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 03:47:00,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:47:00,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:47:01,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289987202] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:01,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:01,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 03:47:01,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147456548] [2023-11-29 03:47:01,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:01,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:47:01,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:01,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:47:01,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:47:01,009 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:01,059 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-11-29 03:47:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:47:01,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-29 03:47:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:01,060 INFO L225 Difference]: With dead ends: 37 [2023-11-29 03:47:01,060 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 03:47:01,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:47:01,062 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:01,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:47:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 03:47:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-29 03:47:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:01,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-29 03:47:01,067 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2023-11-29 03:47:01,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:01,068 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-29 03:47:01,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:01,068 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-29 03:47:01,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 03:47:01,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:01,069 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:01,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:47:01,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:01,270 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:01,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2017877324, now seen corresponding path program 2 times [2023-11-29 03:47:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:01,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659291389] [2023-11-29 03:47:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:01,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 03:47:01,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659291389] [2023-11-29 03:47:01,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659291389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258039315] [2023-11-29 03:47:01,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:47:01,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:01,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:01,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:01,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:47:01,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:47:01,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:01,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 03:47:01,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 03:47:01,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 03:47:01,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258039315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:01,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:01,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-29 03:47:01,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064025501] [2023-11-29 03:47:01,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:01,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 03:47:01,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 03:47:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:47:01,507 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:01,569 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-11-29 03:47:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:47:01,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-29 03:47:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:01,570 INFO L225 Difference]: With dead ends: 38 [2023-11-29 03:47:01,570 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 03:47:01,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:47:01,572 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:01,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 17 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:47:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 03:47:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-29 03:47:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-29 03:47:01,578 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2023-11-29 03:47:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:01,578 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-29 03:47:01,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-29 03:47:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 03:47:01,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:01,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:01,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:47:01,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:01,786 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:01,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash 657232848, now seen corresponding path program 3 times [2023-11-29 03:47:01,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:01,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339712958] [2023-11-29 03:47:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:03,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:03,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339712958] [2023-11-29 03:47:03,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339712958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:03,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764286455] [2023-11-29 03:47:03,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:47:03,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:03,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:03,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:03,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:47:03,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:47:03,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:03,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 03:47:03,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:03,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:47:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:03,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:47:03,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764286455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:03,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:03,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 24 [2023-11-29 03:47:03,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363592232] [2023-11-29 03:47:03,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:03,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:47:03,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:03,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:47:03,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:47:03,660 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:03,989 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-11-29 03:47:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:47:03,989 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-29 03:47:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:03,990 INFO L225 Difference]: With dead ends: 42 [2023-11-29 03:47:03,990 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 03:47:03,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-11-29 03:47:03,992 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:03,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:47:03,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 03:47:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-11-29 03:47:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-11-29 03:47:04,002 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2023-11-29 03:47:04,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:04,003 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-11-29 03:47:04,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-11-29 03:47:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 03:47:04,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:04,004 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:04,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 03:47:04,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:04,205 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:04,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash -604097640, now seen corresponding path program 4 times [2023-11-29 03:47:04,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:04,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879393292] [2023-11-29 03:47:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:04,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 03:47:04,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:04,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879393292] [2023-11-29 03:47:04,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879393292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:04,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065036747] [2023-11-29 03:47:04,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:47:04,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:04,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:04,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:04,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:47:04,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:47:04,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:04,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:47:04,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 03:47:04,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 03:47:04,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065036747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:04,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:04,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-29 03:47:04,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848451667] [2023-11-29 03:47:04,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:04,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:47:04,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:04,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:47:04,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:47:04,586 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:04,913 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-11-29 03:47:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 03:47:04,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-29 03:47:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:04,914 INFO L225 Difference]: With dead ends: 73 [2023-11-29 03:47:04,915 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 03:47:04,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2023-11-29 03:47:04,916 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:04,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 38 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:47:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 03:47:04,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-29 03:47:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-29 03:47:04,924 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2023-11-29 03:47:04,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:04,924 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-29 03:47:04,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-29 03:47:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 03:47:04,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:04,925 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:04,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:47:05,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:05,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:05,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:05,132 INFO L85 PathProgramCache]: Analyzing trace with hash 573634467, now seen corresponding path program 5 times [2023-11-29 03:47:05,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:05,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546977247] [2023-11-29 03:47:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:05,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:07,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:07,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546977247] [2023-11-29 03:47:07,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546977247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:07,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286505875] [2023-11-29 03:47:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:47:07,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:07,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:07,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:07,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:47:07,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 03:47:07,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:07,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 03:47:07,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:07,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:47:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:07,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 03:47:08,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286505875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:08,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:08,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 11] total 41 [2023-11-29 03:47:08,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438820556] [2023-11-29 03:47:08,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:08,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 03:47:08,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:08,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 03:47:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 03:47:08,302 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:09,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:09,312 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2023-11-29 03:47:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 03:47:09,313 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-29 03:47:09,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:09,314 INFO L225 Difference]: With dead ends: 59 [2023-11-29 03:47:09,314 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 03:47:09,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=254, Invalid=2608, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 03:47:09,316 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:09,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 138 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:47:09,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 03:47:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2023-11-29 03:47:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-11-29 03:47:09,328 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 29 [2023-11-29 03:47:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:09,328 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-11-29 03:47:09,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-11-29 03:47:09,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 03:47:09,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:09,329 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:09,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 03:47:09,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:09,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:09,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:09,534 INFO L85 PathProgramCache]: Analyzing trace with hash 497772317, now seen corresponding path program 6 times [2023-11-29 03:47:09,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:09,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392869898] [2023-11-29 03:47:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:09,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 03:47:09,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:09,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392869898] [2023-11-29 03:47:09,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392869898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:09,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060839657] [2023-11-29 03:47:09,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:47:09,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:09,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:09,647 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:09,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:47:09,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 03:47:09,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:09,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:47:09,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 03:47:09,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 03:47:09,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060839657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:09,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:09,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 03:47:09,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739011981] [2023-11-29 03:47:09,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:09,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 03:47:09,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:09,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 03:47:09,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 03:47:09,870 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:10,060 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2023-11-29 03:47:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 03:47:10,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-29 03:47:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:10,062 INFO L225 Difference]: With dead ends: 95 [2023-11-29 03:47:10,062 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 03:47:10,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-29 03:47:10,063 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:10,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 30 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:47:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 03:47:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2023-11-29 03:47:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2023-11-29 03:47:10,075 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2023-11-29 03:47:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:10,075 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2023-11-29 03:47:10,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2023-11-29 03:47:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 03:47:10,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:10,077 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:10,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:47:10,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:10,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:10,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1446173940, now seen corresponding path program 7 times [2023-11-29 03:47:10,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:10,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218472674] [2023-11-29 03:47:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:10,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:47:10,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:10,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218472674] [2023-11-29 03:47:10,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218472674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:10,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260722286] [2023-11-29 03:47:10,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:47:10,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:10,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:10,402 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:10,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:47:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:10,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:47:10,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:47:10,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:47:10,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260722286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:10,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:10,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 03:47:10,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711661681] [2023-11-29 03:47:10,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:10,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 03:47:10,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:10,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 03:47:10,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 03:47:10,642 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:10,813 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-11-29 03:47:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:47:10,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-29 03:47:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:10,814 INFO L225 Difference]: With dead ends: 49 [2023-11-29 03:47:10,814 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 03:47:10,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:47:10,816 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:10,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 23 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:47:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 03:47:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-29 03:47:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-29 03:47:10,825 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2023-11-29 03:47:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:10,825 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-29 03:47:10,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-29 03:47:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 03:47:10,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:10,827 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:10,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:47:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:47:11,029 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:11,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1645096176, now seen corresponding path program 8 times [2023-11-29 03:47:11,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:11,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646382449] [2023-11-29 03:47:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:11,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:13,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:13,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646382449] [2023-11-29 03:47:13,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646382449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:13,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545128571] [2023-11-29 03:47:13,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:47:13,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:13,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:13,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:13,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:47:13,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:47:13,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:13,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-29 03:47:13,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:13,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:47:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:14,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 03:47:14,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545128571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:14,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:14,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 13] total 51 [2023-11-29 03:47:14,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652999297] [2023-11-29 03:47:14,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:14,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 03:47:14,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:14,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 03:47:14,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2364, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 03:47:14,743 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 51 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 51 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:16,048 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2023-11-29 03:47:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 03:47:16,049 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 51 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-29 03:47:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:16,050 INFO L225 Difference]: With dead ends: 67 [2023-11-29 03:47:16,050 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 03:47:16,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=340, Invalid=3950, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 03:47:16,052 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:16,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 149 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 03:47:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 03:47:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2023-11-29 03:47:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2023-11-29 03:47:16,064 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 34 [2023-11-29 03:47:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:16,064 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2023-11-29 03:47:16,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 51 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2023-11-29 03:47:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 03:47:16,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:16,066 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:16,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:47:16,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 03:47:16,268 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:16,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash -245310728, now seen corresponding path program 9 times [2023-11-29 03:47:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:16,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753670924] [2023-11-29 03:47:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:16,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 03:47:16,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:16,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753670924] [2023-11-29 03:47:16,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753670924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:16,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542456399] [2023-11-29 03:47:16,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:47:16,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:16,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:16,406 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:16,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:47:16,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 03:47:16,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:16,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:47:16,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 03:47:16,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 03:47:16,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542456399] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:16,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:16,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-11-29 03:47:16,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707504241] [2023-11-29 03:47:16,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:16,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 03:47:16,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:16,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 03:47:16,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2023-11-29 03:47:16,735 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:17,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:17,152 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2023-11-29 03:47:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 03:47:17,152 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-29 03:47:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:17,153 INFO L225 Difference]: With dead ends: 101 [2023-11-29 03:47:17,153 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 03:47:17,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 03:47:17,155 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:17,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 50 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:47:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 03:47:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-29 03:47:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-11-29 03:47:17,165 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2023-11-29 03:47:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:17,166 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-11-29 03:47:17,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-11-29 03:47:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 03:47:17,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:17,167 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:17,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:47:17,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:17,369 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:17,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:17,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1575564419, now seen corresponding path program 10 times [2023-11-29 03:47:17,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:17,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655257733] [2023-11-29 03:47:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:17,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:20,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:20,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655257733] [2023-11-29 03:47:20,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655257733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:20,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671779551] [2023-11-29 03:47:20,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:47:20,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:20,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:20,706 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:20,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:47:20,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:47:20,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:20,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 03:47:20,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:20,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 03:47:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 03:47:21,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 03:47:22,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671779551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:22,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:22,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 18, 23] total 68 [2023-11-29 03:47:22,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917924763] [2023-11-29 03:47:22,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:22,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-29 03:47:22,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:22,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-29 03:47:22,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=4220, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 03:47:22,733 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 68 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:26,094 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2023-11-29 03:47:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 03:47:26,095 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 68 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 03:47:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:26,096 INFO L225 Difference]: With dead ends: 75 [2023-11-29 03:47:26,096 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 03:47:26,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=843, Invalid=8663, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 03:47:26,099 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:26,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 119 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 03:47:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 03:47:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2023-11-29 03:47:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2023-11-29 03:47:26,114 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 39 [2023-11-29 03:47:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:26,114 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2023-11-29 03:47:26,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 68 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2023-11-29 03:47:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 03:47:26,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:26,115 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:26,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:47:26,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 03:47:26,316 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:26,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:26,317 INFO L85 PathProgramCache]: Analyzing trace with hash 614734781, now seen corresponding path program 11 times [2023-11-29 03:47:26,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:26,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939063431] [2023-11-29 03:47:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:26,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 03:47:26,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:26,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939063431] [2023-11-29 03:47:26,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939063431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:26,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165152757] [2023-11-29 03:47:26,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:47:26,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:26,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:26,471 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:26,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:47:26,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 03:47:26,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:26,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 03:47:26,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 03:47:26,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 03:47:26,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165152757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:26,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:26,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2023-11-29 03:47:26,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767218414] [2023-11-29 03:47:26,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:26,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 03:47:26,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:26,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 03:47:26,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 03:47:26,904 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:27,382 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2023-11-29 03:47:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 03:47:27,382 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 03:47:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:27,383 INFO L225 Difference]: With dead ends: 115 [2023-11-29 03:47:27,383 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 03:47:27,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=450, Invalid=2306, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 03:47:27,385 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:27,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 38 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:47:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 03:47:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-29 03:47:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-11-29 03:47:27,396 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 40 [2023-11-29 03:47:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:27,396 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-11-29 03:47:27,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-11-29 03:47:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 03:47:27,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:27,397 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:27,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:47:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 03:47:27,598 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:27,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1723166224, now seen corresponding path program 12 times [2023-11-29 03:47:27,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:27,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214791350] [2023-11-29 03:47:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:31,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:31,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214791350] [2023-11-29 03:47:31,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214791350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:31,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812430555] [2023-11-29 03:47:31,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:47:31,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:31,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:31,557 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:31,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:47:31,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 03:47:31,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:31,641 WARN L260 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-29 03:47:31,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:31,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 03:47:33,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:47:33,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 03:47:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:47:33,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 03:47:34,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812430555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:34,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:34,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 25, 19] total 75 [2023-11-29 03:47:34,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658013869] [2023-11-29 03:47:34,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:34,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-29 03:47:34,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:34,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-29 03:47:34,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=5257, Unknown=1, NotChecked=0, Total=5550 [2023-11-29 03:47:34,975 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 75 states, 75 states have (on average 1.6) internal successors, (120), 75 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:39,241 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2023-11-29 03:47:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 03:47:39,241 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.6) internal successors, (120), 75 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-29 03:47:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:39,242 INFO L225 Difference]: With dead ends: 83 [2023-11-29 03:47:39,242 INFO L226 Difference]: Without dead ends: 79 [2023-11-29 03:47:39,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=749, Invalid=11682, Unknown=1, NotChecked=0, Total=12432 [2023-11-29 03:47:39,247 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:39,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 208 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 03:47:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-29 03:47:39,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2023-11-29 03:47:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.126984126984127) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2023-11-29 03:47:39,266 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 44 [2023-11-29 03:47:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:39,266 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2023-11-29 03:47:39,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.6) internal successors, (120), 75 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2023-11-29 03:47:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 03:47:39,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:39,267 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:39,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:47:39,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:39,468 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:39,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:39,468 INFO L85 PathProgramCache]: Analyzing trace with hash -793765288, now seen corresponding path program 13 times [2023-11-29 03:47:39,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:39,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640300897] [2023-11-29 03:47:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:39,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-29 03:47:39,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:39,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640300897] [2023-11-29 03:47:39,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640300897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:39,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998702054] [2023-11-29 03:47:39,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:47:39,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:39,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:39,628 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:39,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:47:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:39,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 03:47:39,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-29 03:47:39,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-29 03:47:39,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998702054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:39,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:39,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 03:47:39,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396455448] [2023-11-29 03:47:39,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:39,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 03:47:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:39,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 03:47:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:47:39,917 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:40,205 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2023-11-29 03:47:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 03:47:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-29 03:47:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:40,206 INFO L225 Difference]: With dead ends: 137 [2023-11-29 03:47:40,207 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 03:47:40,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 03:47:40,208 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:40,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 36 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:47:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 03:47:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2023-11-29 03:47:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-11-29 03:47:40,228 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 45 [2023-11-29 03:47:40,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:40,228 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-11-29 03:47:40,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-11-29 03:47:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 03:47:40,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:40,229 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:40,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 03:47:40,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:40,429 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:40,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1255056479, now seen corresponding path program 14 times [2023-11-29 03:47:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:40,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657135594] [2023-11-29 03:47:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:40,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 03:47:40,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:40,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657135594] [2023-11-29 03:47:40,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657135594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:40,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492790457] [2023-11-29 03:47:40,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:47:40,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:40,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:40,626 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:40,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:47:40,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:47:40,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:40,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 03:47:40,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 03:47:40,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 03:47:40,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492790457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:40,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:40,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 03:47:40,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715897572] [2023-11-29 03:47:40,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:40,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 03:47:40,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:40,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 03:47:40,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:47:40,928 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:41,152 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2023-11-29 03:47:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 03:47:41,153 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-29 03:47:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:41,153 INFO L225 Difference]: With dead ends: 70 [2023-11-29 03:47:41,153 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 03:47:41,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 03:47:41,154 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:41,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 20 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:47:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 03:47:41,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-29 03:47:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-11-29 03:47:41,168 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 46 [2023-11-29 03:47:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:41,168 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-11-29 03:47:41,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-11-29 03:47:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 03:47:41,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:41,169 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:41,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:47:41,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:47:41,370 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:41,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:41,370 INFO L85 PathProgramCache]: Analyzing trace with hash -194688669, now seen corresponding path program 15 times [2023-11-29 03:47:41,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:41,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147162440] [2023-11-29 03:47:41,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:41,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:46,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:46,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147162440] [2023-11-29 03:47:46,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147162440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:46,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357364089] [2023-11-29 03:47:46,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:47:46,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:46,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:46,119 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:46,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:47:46,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 03:47:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:46,229 WARN L260 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 141 conjunts are in the unsatisfiable core [2023-11-29 03:47:46,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:46,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 03:47:47,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:47:47,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:47:47,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:47:47,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:47:47,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 71 [2023-11-29 03:47:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 5 proven. 125 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 03:47:48,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 03:47:50,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357364089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:50,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:50,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 25, 21] total 82 [2023-11-29 03:47:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907140985] [2023-11-29 03:47:50,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:50,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-29 03:47:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-29 03:47:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=6286, Unknown=0, NotChecked=0, Total=6642 [2023-11-29 03:47:50,091 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 82 states, 82 states have (on average 1.5975609756097562) internal successors, (131), 82 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:57,292 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2023-11-29 03:47:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 03:47:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.5975609756097562) internal successors, (131), 82 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-29 03:47:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:57,293 INFO L225 Difference]: With dead ends: 91 [2023-11-29 03:47:57,293 INFO L226 Difference]: Without dead ends: 87 [2023-11-29 03:47:57,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3682 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1110, Invalid=15402, Unknown=0, NotChecked=0, Total=16512 [2023-11-29 03:47:57,294 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:57,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 212 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 03:47:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-29 03:47:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2023-11-29 03:47:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2023-11-29 03:47:57,316 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 49 [2023-11-29 03:47:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:57,317 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2023-11-29 03:47:57,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.5975609756097562) internal successors, (131), 82 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2023-11-29 03:47:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 03:47:57,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:57,317 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:57,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 03:47:57,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:47:57,518 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:57,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:57,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1133623389, now seen corresponding path program 16 times [2023-11-29 03:47:57,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:57,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958997104] [2023-11-29 03:47:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:57,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 03:47:57,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958997104] [2023-11-29 03:47:57,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958997104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630171769] [2023-11-29 03:47:57,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:47:57,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:57,704 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:57,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:47:57,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:47:57,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:57,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 03:47:57,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 03:47:57,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 03:47:58,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630171769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:58,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:58,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2023-11-29 03:47:58,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727141916] [2023-11-29 03:47:58,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:58,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 03:47:58,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:58,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 03:47:58,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 03:47:58,233 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:58,901 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2023-11-29 03:47:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 03:47:58,901 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-29 03:47:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:58,902 INFO L225 Difference]: With dead ends: 143 [2023-11-29 03:47:58,902 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 03:47:58,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 69 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=724, Invalid=3968, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 03:47:58,903 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:58,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 35 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:47:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 03:47:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-29 03:47:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-11-29 03:47:58,919 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 50 [2023-11-29 03:47:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:58,920 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-11-29 03:47:58,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-11-29 03:47:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 03:47:58,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:58,920 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:58,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 03:47:59,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:59,121 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:59,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash 50616112, now seen corresponding path program 17 times [2023-11-29 03:47:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:59,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306175824] [2023-11-29 03:47:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:48:05,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:05,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306175824] [2023-11-29 03:48:05,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306175824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:48:05,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754880922] [2023-11-29 03:48:05,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:48:05,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:05,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:05,524 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:05,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:48:05,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 03:48:05,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:48:05,784 WARN L260 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 156 conjunts are in the unsatisfiable core [2023-11-29 03:48:05,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:06,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:48:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:48:07,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 03:48:09,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754880922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:09,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:48:09,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 29, 21] total 91 [2023-11-29 03:48:09,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305454382] [2023-11-29 03:48:09,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:09,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-29 03:48:09,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:09,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-29 03:48:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=7842, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 03:48:09,788 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 91 states, 91 states have (on average 1.5934065934065933) internal successors, (145), 91 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:48:14,601 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2023-11-29 03:48:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 03:48:14,602 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.5934065934065933) internal successors, (145), 91 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-29 03:48:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:48:14,602 INFO L225 Difference]: With dead ends: 99 [2023-11-29 03:48:14,602 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 03:48:14,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3189 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=707, Invalid=14299, Unknown=0, NotChecked=0, Total=15006 [2023-11-29 03:48:14,604 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 2998 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 3063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:48:14,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 255 Invalid, 3063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2998 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 03:48:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 03:48:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2023-11-29 03:48:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.103896103896104) internal successors, (85), 77 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2023-11-29 03:48:14,629 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 54 [2023-11-29 03:48:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:48:14,629 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2023-11-29 03:48:14,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.5934065934065933) internal successors, (145), 91 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2023-11-29 03:48:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 03:48:14,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:48:14,630 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:48:14,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 03:48:14,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:14,831 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:48:14,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:48:14,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1747055032, now seen corresponding path program 18 times [2023-11-29 03:48:14,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:48:14,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104000891] [2023-11-29 03:48:14,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:14,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:48:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-29 03:48:15,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:15,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104000891] [2023-11-29 03:48:15,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104000891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:48:15,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906335213] [2023-11-29 03:48:15,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:48:15,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:15,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:15,082 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:15,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:48:15,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 03:48:15,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:48:15,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 03:48:15,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-29 03:48:15,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-29 03:48:15,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906335213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:15,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:48:15,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-11-29 03:48:15,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944662255] [2023-11-29 03:48:15,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:15,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 03:48:15,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:15,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 03:48:15,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1975, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 03:48:15,775 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:48:16,641 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2023-11-29 03:48:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 03:48:16,641 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-29 03:48:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:48:16,641 INFO L225 Difference]: With dead ends: 157 [2023-11-29 03:48:16,641 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 03:48:16,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 75 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=885, Invalid=4967, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 03:48:16,643 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:48:16,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 59 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:48:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 03:48:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-29 03:48:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-11-29 03:48:16,664 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2023-11-29 03:48:16,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:48:16,664 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-11-29 03:48:16,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-11-29 03:48:16,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 03:48:16,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:48:16,665 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:48:16,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 03:48:16,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:16,866 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:48:16,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:48:16,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2084358589, now seen corresponding path program 19 times [2023-11-29 03:48:16,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:48:16,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030690637] [2023-11-29 03:48:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:16,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:48:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 9 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:48:24,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:24,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030690637] [2023-11-29 03:48:24,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030690637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:48:24,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794700625] [2023-11-29 03:48:24,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:48:24,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:24,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:24,846 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:24,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 03:48:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:24,940 WARN L260 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 174 conjunts are in the unsatisfiable core [2023-11-29 03:48:24,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:25,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:48:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:48:27,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 03:48:29,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794700625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:29,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:48:29,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 32, 23] total 101 [2023-11-29 03:48:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630817571] [2023-11-29 03:48:29,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:29,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-29 03:48:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-29 03:48:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=9648, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 03:48:29,756 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 101 states, 101 states have (on average 1.5742574257425743) internal successors, (159), 101 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:48:35,268 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2023-11-29 03:48:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 03:48:35,268 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.5742574257425743) internal successors, (159), 101 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-29 03:48:35,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:48:35,269 INFO L225 Difference]: With dead ends: 107 [2023-11-29 03:48:35,269 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 03:48:35,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4532 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=942, Invalid=16614, Unknown=0, NotChecked=0, Total=17556 [2023-11-29 03:48:35,271 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 3648 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 3648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:48:35,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 285 Invalid, 3820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 3648 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 03:48:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 03:48:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2023-11-29 03:48:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-11-29 03:48:35,304 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 59 [2023-11-29 03:48:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:48:35,304 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-11-29 03:48:35,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.5742574257425743) internal successors, (159), 101 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-11-29 03:48:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 03:48:35,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:48:35,305 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:48:35,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 03:48:35,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 03:48:35,505 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:48:35,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:48:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1790852349, now seen corresponding path program 20 times [2023-11-29 03:48:35,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:48:35,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823479455] [2023-11-29 03:48:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:35,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:48:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-29 03:48:35,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:35,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823479455] [2023-11-29 03:48:35,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823479455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:48:35,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827185908] [2023-11-29 03:48:35,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:48:35,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:35,794 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:35,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 03:48:35,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:48:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:48:35,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 03:48:35,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-29 03:48:36,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-29 03:48:36,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827185908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:36,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:48:36,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-29 03:48:36,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637887710] [2023-11-29 03:48:36,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:36,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 03:48:36,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 03:48:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 03:48:36,285 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:48:36,691 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2023-11-29 03:48:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 03:48:36,692 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-29 03:48:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:48:36,692 INFO L225 Difference]: With dead ends: 179 [2023-11-29 03:48:36,693 INFO L226 Difference]: Without dead ends: 96 [2023-11-29 03:48:36,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 89 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 03:48:36,694 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 84 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:48:36,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 33 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:48:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-29 03:48:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2023-11-29 03:48:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2023-11-29 03:48:36,733 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 60 [2023-11-29 03:48:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:48:36,733 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2023-11-29 03:48:36,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:36,733 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2023-11-29 03:48:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 03:48:36,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:48:36,734 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:48:36,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 03:48:36,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 03:48:36,934 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:48:36,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:48:36,935 INFO L85 PathProgramCache]: Analyzing trace with hash 806035604, now seen corresponding path program 21 times [2023-11-29 03:48:36,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:48:36,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494578638] [2023-11-29 03:48:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:36,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:48:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-29 03:48:37,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494578638] [2023-11-29 03:48:37,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494578638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:48:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530737794] [2023-11-29 03:48:37,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:48:37,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:37,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:37,211 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:37,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 03:48:37,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 03:48:37,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:48:37,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 03:48:37,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-29 03:48:37,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-29 03:48:37,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530737794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:37,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:48:37,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-29 03:48:37,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546454949] [2023-11-29 03:48:37,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 03:48:37,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:37,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 03:48:37,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 03:48:37,753 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:48:38,071 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2023-11-29 03:48:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 03:48:38,071 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-29 03:48:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:48:38,071 INFO L225 Difference]: With dead ends: 91 [2023-11-29 03:48:38,072 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 03:48:38,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 91 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1665, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 03:48:38,072 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:48:38,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 23 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:48:38,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 03:48:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-29 03:48:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-11-29 03:48:38,098 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 61 [2023-11-29 03:48:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:48:38,098 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-11-29 03:48:38,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-11-29 03:48:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 03:48:38,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:48:38,099 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:48:38,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 03:48:38,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 03:48:38,300 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:48:38,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:48:38,300 INFO L85 PathProgramCache]: Analyzing trace with hash 861726800, now seen corresponding path program 22 times [2023-11-29 03:48:38,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:48:38,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350667240] [2023-11-29 03:48:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:38,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:48:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 13 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:48:47,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:47,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350667240] [2023-11-29 03:48:47,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350667240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:48:47,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197762160] [2023-11-29 03:48:47,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:48:47,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:47,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:47,786 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:47,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 03:48:47,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:48:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:48:47,923 WARN L260 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 172 conjunts are in the unsatisfiable core [2023-11-29 03:48:47,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:47,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 03:48:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:48:50,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:48:53,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197762160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:53,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:48:53,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 26, 25] total 103 [2023-11-29 03:48:53,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801352432] [2023-11-29 03:48:53,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:53,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-11-29 03:48:53,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:53,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-11-29 03:48:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=9966, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 03:48:53,359 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 103 states, 103 states have (on average 1.6116504854368932) internal successors, (166), 103 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:49:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:49:03,139 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2023-11-29 03:49:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 03:49:03,140 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.6116504854368932) internal successors, (166), 103 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-29 03:49:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:49:03,141 INFO L225 Difference]: With dead ends: 115 [2023-11-29 03:49:03,141 INFO L226 Difference]: Without dead ends: 111 [2023-11-29 03:49:03,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6797 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=1605, Invalid=23835, Unknown=0, NotChecked=0, Total=25440 [2023-11-29 03:49:03,142 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 3652 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 3652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:49:03,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 265 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 3652 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 03:49:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-29 03:49:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2023-11-29 03:49:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 91 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:49:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2023-11-29 03:49:03,182 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 64 [2023-11-29 03:49:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:49:03,182 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2023-11-29 03:49:03,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.6116504854368932) internal successors, (166), 103 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:49:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2023-11-29 03:49:03,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 03:49:03,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:49:03,183 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:49:03,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 03:49:03,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 03:49:03,383 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:49:03,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:49:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash 996958488, now seen corresponding path program 23 times [2023-11-29 03:49:03,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:49:03,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730849937] [2023-11-29 03:49:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:49:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:49:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:49:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-29 03:49:03,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:49:03,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730849937] [2023-11-29 03:49:03,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730849937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:49:03,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538996048] [2023-11-29 03:49:03,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:49:03,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:49:03,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:49:03,693 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:49:03,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 03:49:04,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 03:49:04,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:49:04,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 03:49:04,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:49:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-29 03:49:04,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:49:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-29 03:49:04,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538996048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:49:04,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:49:04,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-11-29 03:49:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699892325] [2023-11-29 03:49:04,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:49:04,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 03:49:04,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:49:04,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 03:49:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=2886, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 03:49:04,857 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:49:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:49:05,883 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2023-11-29 03:49:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 03:49:05,883 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-29 03:49:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:49:05,884 INFO L225 Difference]: With dead ends: 185 [2023-11-29 03:49:05,884 INFO L226 Difference]: Without dead ends: 70 [2023-11-29 03:49:05,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 87 SyntacticMatches, 12 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3392 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1255, Invalid=7301, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 03:49:05,885 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:49:05,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 32 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 03:49:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-29 03:49:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-29 03:49:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:49:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2023-11-29 03:49:05,918 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2023-11-29 03:49:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:49:05,918 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2023-11-29 03:49:05,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:49:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2023-11-29 03:49:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 03:49:05,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:49:05,919 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:49:05,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 03:49:06,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 03:49:06,119 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:49:06,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:49:06,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1268841251, now seen corresponding path program 24 times [2023-11-29 03:49:06,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:49:06,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451452657] [2023-11-29 03:49:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:49:06,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:49:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:49:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 3 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:49:21,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:49:21,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451452657] [2023-11-29 03:49:21,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451452657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:49:21,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527747721] [2023-11-29 03:49:21,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:49:21,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:49:21,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:49:21,203 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:49:21,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 03:49:21,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 03:49:21,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:49:21,430 WARN L260 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 217 conjunts are in the unsatisfiable core [2023-11-29 03:49:21,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:49:21,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 03:49:28,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:49:28,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:49:28,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-29 03:49:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 3 proven. 324 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:49:28,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:49:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 03:49:41,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527747721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:49:41,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:49:41,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 60, 49] total 165 [2023-11-29 03:49:41,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770481230] [2023-11-29 03:49:41,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:49:41,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2023-11-29 03:49:41,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:49:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2023-11-29 03:49:41,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1455, Invalid=25605, Unknown=0, NotChecked=0, Total=27060 [2023-11-29 03:49:41,179 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 165 states, 165 states have (on average 1.1515151515151516) internal successors, (190), 165 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:50:02,233 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2023-11-29 03:50:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 03:50:02,234 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.1515151515151516) internal successors, (190), 165 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-29 03:50:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:50:02,235 INFO L225 Difference]: With dead ends: 143 [2023-11-29 03:50:02,235 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 03:50:02,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11574 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=3282, Invalid=44024, Unknown=0, NotChecked=0, Total=47306 [2023-11-29 03:50:02,237 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 167 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 5541 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 6091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 5541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:50:02,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 187 Invalid, 6091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 5541 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-29 03:50:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 03:50:02,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-29 03:50:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-11-29 03:50:02,270 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 69 [2023-11-29 03:50:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:50:02,270 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-11-29 03:50:02,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.1515151515151516) internal successors, (190), 165 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-11-29 03:50:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 03:50:02,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:50:02,271 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:02,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 03:50:02,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 03:50:02,471 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:50:02,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash 619948445, now seen corresponding path program 25 times [2023-11-29 03:50:02,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:02,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120729859] [2023-11-29 03:50:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:02,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-11-29 03:50:02,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:02,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120729859] [2023-11-29 03:50:02,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120729859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:02,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609179353] [2023-11-29 03:50:02,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:50:02,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:02,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:02,845 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:02,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 03:50:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:02,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 03:50:02,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-11-29 03:50:03,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-11-29 03:50:03,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609179353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:03,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:50:03,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-11-29 03:50:03,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181043159] [2023-11-29 03:50:03,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:03,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 03:50:03,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:03,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 03:50:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 03:50:03,417 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:50:03,791 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2023-11-29 03:50:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 03:50:03,791 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-29 03:50:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:50:03,792 INFO L225 Difference]: With dead ends: 167 [2023-11-29 03:50:03,792 INFO L226 Difference]: Without dead ends: 110 [2023-11-29 03:50:03,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 103 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 03:50:03,793 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:50:03,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 31 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:50:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-29 03:50:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2023-11-29 03:50:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0707070707070707) internal successors, (106), 99 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2023-11-29 03:50:03,857 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 70 [2023-11-29 03:50:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:50:03,857 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2023-11-29 03:50:03,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2023-11-29 03:50:03,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 03:50:03,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:50:03,858 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:03,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 03:50:04,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 03:50:04,059 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:50:04,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:04,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1487289460, now seen corresponding path program 26 times [2023-11-29 03:50:04,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598702825] [2023-11-29 03:50:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:04,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 03:50:04,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:04,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598702825] [2023-11-29 03:50:04,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598702825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:04,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268888403] [2023-11-29 03:50:04,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:50:04,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:04,437 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:04,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 03:50:04,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:50:04,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:50:04,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 03:50:04,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 03:50:04,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 03:50:04,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268888403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:04,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:50:04,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-11-29 03:50:04,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985683626] [2023-11-29 03:50:04,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:04,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 03:50:04,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 03:50:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 03:50:04,984 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:50:05,417 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2023-11-29 03:50:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 03:50:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-29 03:50:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:50:05,418 INFO L225 Difference]: With dead ends: 105 [2023-11-29 03:50:05,418 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 03:50:05,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 104 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=676, Invalid=2294, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 03:50:05,419 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:50:05,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:50:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 03:50:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-29 03:50:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-11-29 03:50:05,457 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 71 [2023-11-29 03:50:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:50:05,457 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-11-29 03:50:05,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-11-29 03:50:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-29 03:50:05,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:50:05,458 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:05,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 03:50:05,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 03:50:05,658 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:50:05,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1117856112, now seen corresponding path program 27 times [2023-11-29 03:50:05,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:05,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069403633] [2023-11-29 03:50:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:05,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 18 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:19,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:19,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069403633] [2023-11-29 03:50:19,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069403633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:19,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745612559] [2023-11-29 03:50:19,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:50:19,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:19,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:19,355 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:19,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 03:50:19,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 03:50:19,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:50:19,619 WARN L260 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 239 conjunts are in the unsatisfiable core [2023-11-29 03:50:19,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:20,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 03:50:20,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 03:50:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:50:28,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:50:28,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 86 treesize of output 185 [2023-11-29 03:50:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 6 proven. 369 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 03:50:29,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 362 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 03:50:43,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745612559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:43,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:50:43,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 66, 63] total 190 [2023-11-29 03:50:43,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758209872] [2023-11-29 03:50:43,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:43,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2023-11-29 03:50:43,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2023-11-29 03:50:43,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2321, Invalid=33589, Unknown=0, NotChecked=0, Total=35910 [2023-11-29 03:50:43,370 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 190 states, 190 states have (on average 1.0736842105263158) internal successors, (204), 190 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:00,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:52:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:52:15,081 INFO L93 Difference]: Finished difference Result 339 states and 378 transitions. [2023-11-29 03:52:15,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2023-11-29 03:52:15,082 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 1.0736842105263158) internal successors, (204), 190 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-29 03:52:15,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:52:15,084 INFO L225 Difference]: With dead ends: 339 [2023-11-29 03:52:15,084 INFO L226 Difference]: Without dead ends: 283 [2023-11-29 03:52:15,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35625 ImplicationChecksByTransitivity, 103.1s TimeCoverageRelationStatistics Valid=11130, Invalid=118109, Unknown=1, NotChecked=0, Total=129240 [2023-11-29 03:52:15,089 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 466 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 10585 mSolverCounterSat, 1702 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 12288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1702 IncrementalHoareTripleChecker+Valid, 10585 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:52:15,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 570 Invalid, 12288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1702 Valid, 10585 Invalid, 1 Unknown, 0 Unchecked, 14.7s Time] [2023-11-29 03:52:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-29 03:52:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 171. [2023-11-29 03:52:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1058823529411765) internal successors, (188), 170 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2023-11-29 03:52:15,224 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 74 [2023-11-29 03:52:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:52:15,224 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2023-11-29 03:52:15,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 1.0736842105263158) internal successors, (204), 190 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:15,225 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2023-11-29 03:52:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 03:52:15,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:52:15,225 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:52:15,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 03:52:15,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:52:15,426 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:52:15,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:52:15,426 INFO L85 PathProgramCache]: Analyzing trace with hash 322189062, now seen corresponding path program 28 times [2023-11-29 03:52:15,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:52:15,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047876953] [2023-11-29 03:52:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:52:15,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:52:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:52:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-29 03:52:15,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:52:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047876953] [2023-11-29 03:52:15,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047876953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:52:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568697491] [2023-11-29 03:52:15,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:52:15,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:52:15,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:52:15,865 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:52:15,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 03:52:15,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:52:15,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:52:15,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 03:52:15,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:52:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-29 03:52:16,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:52:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-29 03:52:16,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568697491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:52:16,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:52:16,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-11-29 03:52:16,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645311193] [2023-11-29 03:52:16,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:52:16,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 03:52:16,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:52:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 03:52:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 03:52:16,567 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:52:17,211 INFO L93 Difference]: Finished difference Result 300 states and 325 transitions. [2023-11-29 03:52:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 03:52:17,212 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-29 03:52:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:52:17,212 INFO L225 Difference]: With dead ends: 300 [2023-11-29 03:52:17,212 INFO L226 Difference]: Without dead ends: 117 [2023-11-29 03:52:17,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 111 SyntacticMatches, 25 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 03:52:17,213 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:52:17,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 51 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:52:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-29 03:52:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2023-11-29 03:52:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0654205607476634) internal successors, (114), 107 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2023-11-29 03:52:17,325 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 75 [2023-11-29 03:52:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:52:17,325 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2023-11-29 03:52:17,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2023-11-29 03:52:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-29 03:52:17,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:52:17,325 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:52:17,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 03:52:17,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:52:17,526 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:52:17,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:52:17,526 INFO L85 PathProgramCache]: Analyzing trace with hash -270914349, now seen corresponding path program 29 times [2023-11-29 03:52:17,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:52:17,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116427062] [2023-11-29 03:52:17,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:52:17,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:52:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:52:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 66 proven. 103 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-29 03:52:17,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:52:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116427062] [2023-11-29 03:52:17,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116427062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:52:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767782036] [2023-11-29 03:52:17,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:52:17,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:52:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:52:17,949 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:52:17,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 03:52:18,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 03:52:18,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:52:18,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 03:52:18,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:52:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-29 03:52:18,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:52:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-29 03:52:18,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767782036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:52:18,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:52:18,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-11-29 03:52:18,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755263807] [2023-11-29 03:52:18,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:52:18,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 03:52:18,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:52:18,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 03:52:18,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 03:52:18,885 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:52:19,406 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2023-11-29 03:52:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 03:52:19,407 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2023-11-29 03:52:19,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:52:19,407 INFO L225 Difference]: With dead ends: 113 [2023-11-29 03:52:19,408 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 03:52:19,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 26 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 03:52:19,409 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:52:19,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:52:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 03:52:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2023-11-29 03:52:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2023-11-29 03:52:19,486 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 78 [2023-11-29 03:52:19,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:52:19,486 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2023-11-29 03:52:19,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2023-11-29 03:52:19,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-29 03:52:19,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:52:19,487 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:52:19,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-29 03:52:19,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:52:19,687 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:52:19,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:52:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash 219977731, now seen corresponding path program 30 times [2023-11-29 03:52:19,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:52:19,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479321962] [2023-11-29 03:52:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:52:19,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:52:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:52:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 21 proven. 434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:52:37,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:52:37,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479321962] [2023-11-29 03:52:37,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479321962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:52:37,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623850592] [2023-11-29 03:52:37,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:52:37,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:52:37,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:52:37,537 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:52:37,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 03:52:37,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 03:52:37,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:52:37,972 WARN L260 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 239 conjunts are in the unsatisfiable core [2023-11-29 03:52:37,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:52:38,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 03:52:43,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:52:43,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:52:43,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:52:43,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:52:43,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 74 [2023-11-29 03:52:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 13 proven. 364 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 03:52:43,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:52:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 03:52:49,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623850592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:52:49,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:52:49,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 37, 33] total 138 [2023-11-29 03:52:49,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750095218] [2023-11-29 03:52:49,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:52:49,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2023-11-29 03:52:49,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:52:50,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2023-11-29 03:52:50,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=776, Invalid=18130, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 03:52:50,001 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 138 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 138 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:14,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:53:14,500 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2023-11-29 03:53:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-29 03:53:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 138 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-29 03:53:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:53:14,501 INFO L225 Difference]: With dead ends: 139 [2023-11-29 03:53:14,502 INFO L226 Difference]: Without dead ends: 135 [2023-11-29 03:53:14,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12080 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=2705, Invalid=45915, Unknown=0, NotChecked=0, Total=48620 [2023-11-29 03:53:14,504 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 79 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 5950 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 6202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 5950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:53:14,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 325 Invalid, 6202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 5950 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-29 03:53:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-29 03:53:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2023-11-29 03:53:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 112 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 120 transitions. [2023-11-29 03:53:14,627 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 120 transitions. Word has length 79 [2023-11-29 03:53:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:53:14,627 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 120 transitions. [2023-11-29 03:53:14,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 138 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 120 transitions. [2023-11-29 03:53:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-29 03:53:14,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:53:14,628 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:53:14,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 03:53:14,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:53:14,828 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:53:14,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:53:14,829 INFO L85 PathProgramCache]: Analyzing trace with hash 930872893, now seen corresponding path program 31 times [2023-11-29 03:53:14,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:53:14,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136159037] [2023-11-29 03:53:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:53:14,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:53:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:53:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-29 03:53:15,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:53:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136159037] [2023-11-29 03:53:15,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136159037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:53:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152832963] [2023-11-29 03:53:15,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:53:15,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:53:15,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:53:15,359 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:53:15,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 03:53:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:53:15,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:53:15,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:53:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-29 03:53:15,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:53:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-29 03:53:16,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152832963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:53:16,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:53:16,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-29 03:53:16,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740495380] [2023-11-29 03:53:16,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:53:16,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 03:53:16,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:53:16,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 03:53:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 03:53:16,125 INFO L87 Difference]: Start difference. First operand 113 states and 120 transitions. Second operand has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:53:16,930 INFO L93 Difference]: Finished difference Result 235 states and 250 transitions. [2023-11-29 03:53:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 03:53:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-11-29 03:53:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:53:16,931 INFO L225 Difference]: With dead ends: 235 [2023-11-29 03:53:16,931 INFO L226 Difference]: Without dead ends: 124 [2023-11-29 03:53:16,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 117 SyntacticMatches, 27 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 03:53:16,932 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:53:16,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 39 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:53:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-29 03:53:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2023-11-29 03:53:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 113 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2023-11-29 03:53:17,101 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 80 [2023-11-29 03:53:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:53:17,101 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2023-11-29 03:53:17,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2023-11-29 03:53:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-29 03:53:17,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:53:17,102 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:53:17,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 03:53:17,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:53:17,303 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:53:17,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:53:17,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1857171540, now seen corresponding path program 32 times [2023-11-29 03:53:17,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:53:17,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486933401] [2023-11-29 03:53:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:53:17,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:53:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:53:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 78 proven. 118 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-29 03:53:17,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:53:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486933401] [2023-11-29 03:53:17,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486933401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:53:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427547890] [2023-11-29 03:53:17,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:53:17,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:53:17,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:53:17,774 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:53:17,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 03:53:17,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:53:17,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:53:17,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:53:17,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:53:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-29 03:53:18,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:53:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-29 03:53:18,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427547890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:53:18,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:53:18,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-29 03:53:18,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958596147] [2023-11-29 03:53:18,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:53:18,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 03:53:18,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:53:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 03:53:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 03:53:18,525 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:53:19,214 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2023-11-29 03:53:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 03:53:19,214 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-11-29 03:53:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:53:19,215 INFO L225 Difference]: With dead ends: 119 [2023-11-29 03:53:19,215 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 03:53:19,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 118 SyntacticMatches, 28 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=883, Invalid=3023, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 03:53:19,216 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:53:19,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 41 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:53:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 03:53:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-29 03:53:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-11-29 03:53:19,308 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 81 [2023-11-29 03:53:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:53:19,308 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-11-29 03:53:19,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-11-29 03:53:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 03:53:19,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:53:19,309 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:53:19,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-29 03:53:19,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 03:53:19,510 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:53:19,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:53:19,510 INFO L85 PathProgramCache]: Analyzing trace with hash -365755760, now seen corresponding path program 33 times [2023-11-29 03:53:19,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:53:19,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932316894] [2023-11-29 03:53:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:53:19,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:53:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:53:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 9 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:53:38,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:53:38,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932316894] [2023-11-29 03:53:38,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932316894] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:53:38,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515142233] [2023-11-29 03:53:38,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:53:38,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:53:38,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:53:38,457 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:53:38,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 03:53:38,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 03:53:38,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:53:38,777 WARN L260 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 275 conjunts are in the unsatisfiable core [2023-11-29 03:53:38,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:53:39,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:53:39,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:53:45,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:53:45,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:53:45,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 86 treesize of output 185 [2023-11-29 03:53:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:53:46,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:53:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 522 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:53:56,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515142233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:53:56,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:53:56,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 52, 46] total 169 [2023-11-29 03:53:56,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215053440] [2023-11-29 03:53:56,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:53:56,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2023-11-29 03:53:56,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:53:56,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2023-11-29 03:53:56,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2225, Invalid=26167, Unknown=0, NotChecked=0, Total=28392 [2023-11-29 03:53:56,383 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 169 states, 169 states have (on average 1.4378698224852071) internal successors, (243), 169 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:26,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:54:26,813 INFO L93 Difference]: Finished difference Result 265 states and 283 transitions. [2023-11-29 03:54:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-11-29 03:54:26,814 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 1.4378698224852071) internal successors, (243), 169 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-29 03:54:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:54:26,815 INFO L225 Difference]: With dead ends: 265 [2023-11-29 03:54:26,815 INFO L226 Difference]: Without dead ends: 144 [2023-11-29 03:54:26,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20949 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=5535, Invalid=66021, Unknown=0, NotChecked=0, Total=71556 [2023-11-29 03:54:26,818 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 255 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 7431 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 8298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 7431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:54:26,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 322 Invalid, 8298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 7431 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-11-29 03:54:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-29 03:54:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2023-11-29 03:54:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 120 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2023-11-29 03:54:26,966 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 84 [2023-11-29 03:54:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:54:26,966 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2023-11-29 03:54:26,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 1.4378698224852071) internal successors, (243), 169 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2023-11-29 03:54:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-29 03:54:26,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:54:26,967 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:54:26,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 03:54:27,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 03:54:27,167 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:54:27,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:54:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash 603687969, now seen corresponding path program 34 times [2023-11-29 03:54:27,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:54:27,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114652780] [2023-11-29 03:54:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:54:27,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:54:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:54:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 91 proven. 134 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-29 03:54:27,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:54:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114652780] [2023-11-29 03:54:27,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114652780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:54:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564828650] [2023-11-29 03:54:27,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:54:27,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:27,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:54:27,732 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:54:27,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 03:54:27,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:54:27,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:54:27,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 03:54:27,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:54:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-29 03:54:28,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:54:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-29 03:54:28,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564828650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:54:28,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:54:28,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-11-29 03:54:28,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884332880] [2023-11-29 03:54:28,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:54:28,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 03:54:28,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:54:28,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 03:54:28,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 03:54:28,522 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 50 states, 50 states have (on average 1.66) internal successors, (83), 50 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:54:29,236 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2023-11-29 03:54:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 03:54:29,236 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.66) internal successors, (83), 50 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-29 03:54:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:54:29,237 INFO L225 Difference]: With dead ends: 161 [2023-11-29 03:54:29,237 INFO L226 Difference]: Without dead ends: 90 [2023-11-29 03:54:29,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 126 SyntacticMatches, 30 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=997, Invalid=3425, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 03:54:29,238 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:54:29,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 35 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:54:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-29 03:54:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-11-29 03:54:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2023-11-29 03:54:29,352 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 86 [2023-11-29 03:54:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:54:29,352 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2023-11-29 03:54:29,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.66) internal successors, (83), 50 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2023-11-29 03:54:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 03:54:29,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:54:29,353 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:54:29,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 03:54:29,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:29,553 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:54:29,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:54:29,554 INFO L85 PathProgramCache]: Analyzing trace with hash -355201821, now seen corresponding path program 35 times [2023-11-29 03:54:29,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:54:29,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640658685] [2023-11-29 03:54:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:54:29,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:54:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:54:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 30 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:54:52,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:54:52,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640658685] [2023-11-29 03:54:52,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640658685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:54:52,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028691270] [2023-11-29 03:54:52,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:54:52,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:52,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:54:52,777 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:54:52,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 03:54:54,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-29 03:54:54,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:54:54,436 WARN L260 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 314 conjunts are in the unsatisfiable core [2023-11-29 03:54:54,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:54:54,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:54:54,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:54:54,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:54:54,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:54:54,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:54:54,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:54:54,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:54:55,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 03:54:55,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 03:54:55,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 03:54:55,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 03:54:55,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 03:54:55,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:54:55,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 03:54:55,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:54:55,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 03:54:55,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:54:55,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 03:55:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:55:01,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:55:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 03:55:09,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028691270] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:55:09,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:55:09,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 51, 35] total 162 [2023-11-29 03:55:09,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552705025] [2023-11-29 03:55:09,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:55:09,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2023-11-29 03:55:09,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:55:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2023-11-29 03:55:09,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1008, Invalid=25074, Unknown=0, NotChecked=0, Total=26082 [2023-11-29 03:55:09,097 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 162 states, 162 states have (on average 1.5) internal successors, (243), 162 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:55:24,474 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2023-11-29 03:55:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 03:55:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 1.5) internal successors, (243), 162 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-11-29 03:55:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:55:24,475 INFO L225 Difference]: With dead ends: 155 [2023-11-29 03:55:24,475 INFO L226 Difference]: Without dead ends: 151 [2023-11-29 03:55:24,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13426 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=2050, Invalid=42260, Unknown=0, NotChecked=0, Total=44310 [2023-11-29 03:55:24,477 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 6382 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 6680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 6382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:55:24,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 321 Invalid, 6680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 6382 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-29 03:55:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-29 03:55:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 127. [2023-11-29 03:55:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 126 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 134 transitions. [2023-11-29 03:55:24,637 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 134 transitions. Word has length 89 [2023-11-29 03:55:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:55:24,637 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 134 transitions. [2023-11-29 03:55:24,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 1.5) internal successors, (243), 162 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 134 transitions. [2023-11-29 03:55:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 03:55:24,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:55:24,637 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:55:24,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 03:55:24,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:55:24,838 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:55:24,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:55:24,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1109474013, now seen corresponding path program 36 times [2023-11-29 03:55:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:55:24,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818633487] [2023-11-29 03:55:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:55:24,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:55:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:55:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 121 proven. 135 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-11-29 03:55:25,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:55:25,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818633487] [2023-11-29 03:55:25,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818633487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:55:25,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133111940] [2023-11-29 03:55:25,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:55:25,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:55:25,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:55:25,403 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:55:25,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 03:55:26,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 03:55:26,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:55:26,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:55:26,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:55:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-11-29 03:55:26,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:55:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-11-29 03:55:27,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133111940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:55:27,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:55:27,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 84 [2023-11-29 03:55:27,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062691473] [2023-11-29 03:55:27,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:55:27,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-29 03:55:27,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:55:27,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-29 03:55:27,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=5916, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 03:55:27,610 INFO L87 Difference]: Start difference. First operand 127 states and 134 transitions. Second operand has 84 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:55:29,389 INFO L93 Difference]: Finished difference Result 255 states and 272 transitions. [2023-11-29 03:55:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 03:55:29,389 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-11-29 03:55:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:55:29,390 INFO L225 Difference]: With dead ends: 255 [2023-11-29 03:55:29,390 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 03:55:29,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 117 SyntacticMatches, 17 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7257 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2460, Invalid=15096, Unknown=0, NotChecked=0, Total=17556 [2023-11-29 03:55:29,392 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 823 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 823 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:55:29,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 62 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [823 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 03:55:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 03:55:29,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-29 03:55:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2023-11-29 03:55:29,516 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 90 [2023-11-29 03:55:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:55:29,517 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2023-11-29 03:55:29,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2023-11-29 03:55:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 03:55:29,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:55:29,517 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:55:29,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 03:55:29,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 03:55:29,718 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:55:29,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:55:29,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1911851952, now seen corresponding path program 37 times [2023-11-29 03:55:29,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:55:29,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432009571] [2023-11-29 03:55:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:55:29,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:55:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:55:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 78 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:55:55,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:55:55,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432009571] [2023-11-29 03:55:55,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432009571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:55:55,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240511733] [2023-11-29 03:55:55,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:55:55,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:55:55,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:55:55,812 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:55:55,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 03:55:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:55:55,979 WARN L260 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 300 conjunts are in the unsatisfiable core [2023-11-29 03:55:55,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:55:57,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:56:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:56:02,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:56:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 544 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 03:56:11,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240511733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:56:11,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:56:11,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 53, 37] total 171 [2023-11-29 03:56:11,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271227650] [2023-11-29 03:56:11,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:56:11,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2023-11-29 03:56:11,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:56:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2023-11-29 03:56:11,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=27734, Unknown=0, NotChecked=0, Total=29070 [2023-11-29 03:56:11,074 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 171 states, 171 states have (on average 1.5029239766081872) internal successors, (257), 171 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:56:28,841 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2023-11-29 03:56:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 03:56:28,842 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.5029239766081872) internal successors, (257), 171 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2023-11-29 03:56:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:56:28,842 INFO L225 Difference]: With dead ends: 163 [2023-11-29 03:56:28,842 INFO L226 Difference]: Without dead ends: 159 [2023-11-29 03:56:28,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17687 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=2564, Invalid=47388, Unknown=0, NotChecked=0, Total=49952 [2023-11-29 03:56:28,844 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 7772 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 8091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 7772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:56:28,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 353 Invalid, 8091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 7772 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-11-29 03:56:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-29 03:56:29,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2023-11-29 03:56:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0601503759398496) internal successors, (141), 133 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2023-11-29 03:56:29,023 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 94 [2023-11-29 03:56:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:56:29,023 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2023-11-29 03:56:29,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.5029239766081872) internal successors, (257), 171 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2023-11-29 03:56:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 03:56:29,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:56:29,024 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:56:29,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 03:56:29,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 03:56:29,225 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:56:29,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:56:29,225 INFO L85 PathProgramCache]: Analyzing trace with hash -470073544, now seen corresponding path program 38 times [2023-11-29 03:56:29,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:56:29,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066316626] [2023-11-29 03:56:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:56:29,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:56:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:56:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 137 proven. 152 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-11-29 03:56:29,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:56:29,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066316626] [2023-11-29 03:56:29,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066316626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:56:29,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626857135] [2023-11-29 03:56:29,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:56:29,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:56:29,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:56:29,961 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:56:29,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 03:56:30,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:56:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:56:30,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 03:56:30,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:56:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-11-29 03:56:30,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:56:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-11-29 03:56:30,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626857135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:56:30,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:56:30,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-11-29 03:56:30,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691764118] [2023-11-29 03:56:30,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:56:30,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 03:56:30,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:56:30,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 03:56:30,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 03:56:30,969 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:56:32,065 INFO L93 Difference]: Finished difference Result 277 states and 292 transitions. [2023-11-29 03:56:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 03:56:32,065 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-11-29 03:56:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:56:32,066 INFO L225 Difference]: With dead ends: 277 [2023-11-29 03:56:32,066 INFO L226 Difference]: Without dead ends: 145 [2023-11-29 03:56:32,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 138 SyntacticMatches, 33 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 03:56:32,067 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:56:32,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 42 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:56:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-29 03:56:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 135. [2023-11-29 03:56:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0522388059701493) internal successors, (141), 134 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 141 transitions. [2023-11-29 03:56:32,303 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 141 transitions. Word has length 95 [2023-11-29 03:56:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:56:32,303 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 141 transitions. [2023-11-29 03:56:32,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 141 transitions. [2023-11-29 03:56:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-29 03:56:32,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:56:32,304 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:56:32,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 03:56:32,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:56:32,504 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:56:32,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:56:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1534442561, now seen corresponding path program 39 times [2023-11-29 03:56:32,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:56:32,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321614627] [2023-11-29 03:56:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:56:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:56:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:56:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 120 proven. 169 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-11-29 03:56:33,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:56:33,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321614627] [2023-11-29 03:56:33,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321614627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:56:33,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687803337] [2023-11-29 03:56:33,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:56:33,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:56:33,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:56:33,243 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:56:33,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 03:56:33,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-29 03:56:33,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:56:33,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 03:56:33,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:56:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-11-29 03:56:34,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:56:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-11-29 03:56:34,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687803337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:56:34,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:56:34,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-11-29 03:56:34,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304244907] [2023-11-29 03:56:34,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:56:34,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 03:56:34,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:56:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 03:56:34,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 03:56:34,713 INFO L87 Difference]: Start difference. First operand 135 states and 141 transitions. Second operand has 56 states, 56 states have (on average 1.625) internal successors, (91), 56 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:56:35,547 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2023-11-29 03:56:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 03:56:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.625) internal successors, (91), 56 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2023-11-29 03:56:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:56:35,549 INFO L225 Difference]: With dead ends: 140 [2023-11-29 03:56:35,549 INFO L226 Difference]: Without dead ends: 100 [2023-11-29 03:56:35,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 139 SyntacticMatches, 34 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1246, Invalid=4304, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 03:56:35,550 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:56:35,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 23 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:56:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-29 03:56:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-29 03:56:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2023-11-29 03:56:35,696 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 96 [2023-11-29 03:56:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:56:35,696 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2023-11-29 03:56:35,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.625) internal successors, (91), 56 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2023-11-29 03:56:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-29 03:56:35,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:56:35,697 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:56:35,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 03:56:35,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-29 03:56:35,898 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:56:35,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:56:35,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1222990275, now seen corresponding path program 40 times [2023-11-29 03:56:35,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:56:35,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300788988] [2023-11-29 03:56:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:56:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:56:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:57:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 43 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:57:08,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:57:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300788988] [2023-11-29 03:57:08,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300788988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:57:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497472146] [2023-11-29 03:57:08,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:57:08,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:08,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:57:08,266 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:57:08,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64d8ea65-98cf-468d-af51-44f4e82bc717/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 03:57:08,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:57:08,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:57:08,519 WARN L260 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 282 conjunts are in the unsatisfiable core [2023-11-29 03:57:08,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:57:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 03:57:15,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:57:38,332 WARN L293 SmtUtils]: Spent 13.06s on a formula simplification that was a NOOP. DAG size: 969 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-29 03:57:38,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:57:38,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 34 select indices, 34 select index equivalence classes, 0 disjoint index pairs (out of 561 index pairs), introduced 34 new quantified variables, introduced 561 case distinctions, treesize of input 290 treesize of output 2623