./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx --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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:05:01,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:05:01,741 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:05:01,752 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:05:01,753 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:05:01,791 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:05:01,793 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:05:01,794 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:05:01,795 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:05:01,796 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:05:01,796 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:05:01,797 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:05:01,798 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:05:01,798 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:05:01,799 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:05:01,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:05:01,800 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:05:01,801 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:05:01,801 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:05:01,802 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:05:01,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:05:01,803 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:05:01,803 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:05:01,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:05:01,804 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:05:01,805 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:05:01,805 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:05:01,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:05:01,807 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:05:01,807 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:05:01,809 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:05:01,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:05:01,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:05:01,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:05:01,810 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:05:01,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:05:01,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:05:01,811 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:05:01,811 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:05:01,812 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:05:01,812 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:05:01,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:05:01,813 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_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2023-11-21 22:05:02,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:05:02,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:05:02,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:05:02,123 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:05:02,124 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:05:02,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-11-21 22:05:05,153 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:05:05,519 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:05:05,519 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-11-21 22:05:05,535 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/data/50d803c89/2a161e52124240448fa434c3b0647356/FLAG6c5f44576 [2023-11-21 22:05:05,551 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/data/50d803c89/2a161e52124240448fa434c3b0647356 [2023-11-21 22:05:05,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:05:05,556 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:05:05,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:05:05,558 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:05:05,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:05:05,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:05:05" (1/1) ... [2023-11-21 22:05:05,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d3c594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:05, skipping insertion in model container [2023-11-21 22:05:05,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:05:05" (1/1) ... [2023-11-21 22:05:05,613 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:05:05,954 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_02caaced-cad4-450b-bf05-67e992332eae/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-11-21 22:05:05,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:05,978 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:05:06,053 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_02caaced-cad4-450b-bf05-67e992332eae/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-11-21 22:05:06,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:06,092 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:05:06,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06 WrapperNode [2023-11-21 22:05:06,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:05:06,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:05:06,094 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:05:06,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:05:06,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,119 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,146 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 131 [2023-11-21 22:05:06,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:05:06,147 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:05:06,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:05:06,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:05:06,160 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,166 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,185 INFO L187 HeapSplitter]: Split 13 memory accesses to 3 slices as follows [2, 5, 6] [2023-11-21 22:05:06,186 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,199 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,204 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,207 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,209 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,213 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:05:06,224 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:05:06,225 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:05:06,225 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:05:06,226 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (1/1) ... [2023-11-21 22:05:06,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:05:06,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:06,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:05:06,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:05:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-21 22:05:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-21 22:05:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:05:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2023-11-21 22:05:06,297 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2023-11-21 22:05:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:05:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:05:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-21 22:05:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-21 22:05:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-21 22:05:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-21 22:05:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-21 22:05:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-21 22:05:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:05:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-21 22:05:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-21 22:05:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-21 22:05:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:05:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:05:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 22:05:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:05:06,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:05:06,438 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:05:06,440 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:05:06,466 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-21 22:05:06,698 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:05:06,766 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:05:06,767 INFO L308 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-21 22:05:06,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:06 BoogieIcfgContainer [2023-11-21 22:05:06,769 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:05:06,771 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:05:06,772 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:05:06,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:05:06,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:05:05" (1/3) ... [2023-11-21 22:05:06,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b6802d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:05:06, skipping insertion in model container [2023-11-21 22:05:06,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:06" (2/3) ... [2023-11-21 22:05:06,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b6802d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:05:06, skipping insertion in model container [2023-11-21 22:05:06,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:06" (3/3) ... [2023-11-21 22:05:06,778 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2023-11-21 22:05:06,797 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:05:06,797 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:05:06,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:05:06,850 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;@e2aabe9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:05:06,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:05:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 28 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 22:05:06,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:06,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:06,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:06,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:06,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1587196413, now seen corresponding path program 1 times [2023-11-21 22:05:06,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:06,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745973938] [2023-11-21 22:05:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:06,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:07,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:07,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:05:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:05:07,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:07,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745973938] [2023-11-21 22:05:07,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745973938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:07,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:07,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:05:07,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248203725] [2023-11-21 22:05:07,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:07,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 22:05:07,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 22:05:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:05:07,244 INFO L87 Difference]: Start difference. First operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 28 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:05:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:07,326 INFO L93 Difference]: Finished difference Result 66 states and 94 transitions. [2023-11-21 22:05:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 22:05:07,347 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-21 22:05:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:07,361 INFO L225 Difference]: With dead ends: 66 [2023-11-21 22:05:07,361 INFO L226 Difference]: Without dead ends: 27 [2023-11-21 22:05:07,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:05:07,382 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:07,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:05:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-21 22:05:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-21 22:05:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-11-21 22:05:07,429 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2023-11-21 22:05:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:07,430 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-11-21 22:05:07,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:05:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-11-21 22:05:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 22:05:07,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:07,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:07,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:05:07,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:07,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1429883115, now seen corresponding path program 1 times [2023-11-21 22:05:07,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:07,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809516639] [2023-11-21 22:05:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:07,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:07,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:07,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:05:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:05:07,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:07,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809516639] [2023-11-21 22:05:07,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809516639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:07,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238663173] [2023-11-21 22:05:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:07,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:07,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:07,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:07,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:05:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:08,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:05:08,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:08,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:08,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238663173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:08,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:05:08,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-21 22:05:08,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110878762] [2023-11-21 22:05:08,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:08,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:05:08,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:05:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:05:08,232 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:05:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:08,411 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-11-21 22:05:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:05:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-11-21 22:05:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:08,415 INFO L225 Difference]: With dead ends: 49 [2023-11-21 22:05:08,416 INFO L226 Difference]: Without dead ends: 29 [2023-11-21 22:05:08,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:05:08,420 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:08,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 104 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:05:08,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-21 22:05:08,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-21 22:05:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-21 22:05:08,438 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 22 [2023-11-21 22:05:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:08,440 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-21 22:05:08,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:05:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-21 22:05:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 22:05:08,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:08,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:08,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:08,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:08,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:08,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:08,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1004596092, now seen corresponding path program 1 times [2023-11-21 22:05:08,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:08,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263892641] [2023-11-21 22:05:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:08,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:08,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:08,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:05:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:05:08,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:08,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263892641] [2023-11-21 22:05:08,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263892641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:08,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:08,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:05:08,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794717079] [2023-11-21 22:05:08,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:08,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:05:08,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:05:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:05:08,860 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:05:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:08,993 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-11-21 22:05:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:05:08,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-11-21 22:05:08,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:08,996 INFO L225 Difference]: With dead ends: 47 [2023-11-21 22:05:08,997 INFO L226 Difference]: Without dead ends: 44 [2023-11-21 22:05:08,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:05:09,001 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:09,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 104 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:05:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-21 22:05:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2023-11-21 22:05:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-11-21 22:05:09,015 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 26 [2023-11-21 22:05:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:09,015 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-11-21 22:05:09,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:05:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-11-21 22:05:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 22:05:09,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:09,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:09,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:05:09,020 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:09,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1076084260, now seen corresponding path program 1 times [2023-11-21 22:05:09,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:09,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129276818] [2023-11-21 22:05:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:09,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:09,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:09,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:05:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:05:09,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:09,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129276818] [2023-11-21 22:05:09,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129276818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:09,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176405840] [2023-11-21 22:05:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:09,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:09,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:09,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:05:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:09,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:05:09,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:05:09,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:05:09,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176405840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:09,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:09,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-11-21 22:05:09,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869338335] [2023-11-21 22:05:09,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:09,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:05:09,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:09,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:05:09,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:05:09,868 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 15 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:10,274 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2023-11-21 22:05:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:05:10,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2023-11-21 22:05:10,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:10,277 INFO L225 Difference]: With dead ends: 71 [2023-11-21 22:05:10,277 INFO L226 Difference]: Without dead ends: 49 [2023-11-21 22:05:10,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:05:10,279 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:10,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 147 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:05:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-21 22:05:10,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2023-11-21 22:05:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-11-21 22:05:10,287 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 27 [2023-11-21 22:05:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:10,288 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-11-21 22:05:10,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-11-21 22:05:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 22:05:10,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:10,289 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:10,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:10,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:10,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:10,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1817431523, now seen corresponding path program 2 times [2023-11-21 22:05:10,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:10,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000683482] [2023-11-21 22:05:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:10,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:10,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 22:05:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:05:10,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000683482] [2023-11-21 22:05:10,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000683482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86789375] [2023-11-21 22:05:10,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:05:10,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:10,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:10,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:10,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:05:10,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:05:10,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:10,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-21 22:05:10,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:11,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-21 22:05:11,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-21 22:05:11,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-21 22:05:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:11,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:11,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-21 22:05:11,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-21 22:05:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:05:11,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86789375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:11,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:11,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 13 [2023-11-21 22:05:11,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380051345] [2023-11-21 22:05:11,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:11,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:05:11,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:11,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:05:11,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:05:11,366 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:11,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:11,676 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-11-21 22:05:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:05:11,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-11-21 22:05:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:11,679 INFO L225 Difference]: With dead ends: 57 [2023-11-21 22:05:11,680 INFO L226 Difference]: Without dead ends: 54 [2023-11-21 22:05:11,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:05:11,681 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:11,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 224 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:05:11,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-21 22:05:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2023-11-21 22:05:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:05:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-11-21 22:05:11,696 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2023-11-21 22:05:11,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:11,696 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-11-21 22:05:11,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-11-21 22:05:11,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 22:05:11,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:11,700 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:11,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:11,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:11,920 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:11,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash -507425885, now seen corresponding path program 3 times [2023-11-21 22:05:11,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:11,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043874706] [2023-11-21 22:05:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:11,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:12,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:12,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 22:05:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:05:12,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:12,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043874706] [2023-11-21 22:05:12,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043874706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:12,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623366158] [2023-11-21 22:05:12,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:05:12,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:12,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:12,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:12,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:05:12,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 22:05:12,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:12,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 22:05:12,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:05:12,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:05:12,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623366158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:12,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:12,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 24 [2023-11-21 22:05:12,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255016348] [2023-11-21 22:05:12,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:12,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-21 22:05:12,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-21 22:05:12,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:05:12,936 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:13,419 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2023-11-21 22:05:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:05:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-11-21 22:05:13,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:13,422 INFO L225 Difference]: With dead ends: 110 [2023-11-21 22:05:13,422 INFO L226 Difference]: Without dead ends: 107 [2023-11-21 22:05:13,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-11-21 22:05:13,424 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:13,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 265 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:05:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-21 22:05:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2023-11-21 22:05:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 68 states have internal predecessors, (80), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-21 22:05:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2023-11-21 22:05:13,450 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 32 [2023-11-21 22:05:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:13,451 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2023-11-21 22:05:13,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2023-11-21 22:05:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-21 22:05:13,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:13,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:13,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:13,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 22:05:13,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:13,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:13,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1448043229, now seen corresponding path program 4 times [2023-11-21 22:05:13,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:13,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723100840] [2023-11-21 22:05:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:13,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:14,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:14,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 22:05:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:05:14,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:14,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723100840] [2023-11-21 22:05:14,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723100840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:14,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787369233] [2023-11-21 22:05:14,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:05:14,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:14,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:14,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:14,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:05:14,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:05:14,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:14,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-21 22:05:14,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:14,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-21 22:05:14,617 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 [2023-11-21 22:05:14,625 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 [2023-11-21 22:05:14,681 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:05:14,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-11-21 22:05:14,749 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 22 [2023-11-21 22:05:14,773 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 27 treesize of output 15 [2023-11-21 22:05:15,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2023-11-21 22:05:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:15,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:15,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 52 [2023-11-21 22:05:15,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 36 [2023-11-21 22:05:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:05:23,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787369233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:23,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:23,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2023-11-21 22:05:23,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71077870] [2023-11-21 22:05:23,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:23,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-21 22:05:23,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-21 22:05:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=401, Unknown=4, NotChecked=0, Total=462 [2023-11-21 22:05:23,900 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:24,759 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2023-11-21 22:05:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:05:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2023-11-21 22:05:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:24,761 INFO L225 Difference]: With dead ends: 133 [2023-11-21 22:05:24,761 INFO L226 Difference]: Without dead ends: 126 [2023-11-21 22:05:24,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=85, Invalid=561, Unknown=4, NotChecked=0, Total=650 [2023-11-21 22:05:24,763 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:24,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 309 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:05:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-21 22:05:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2023-11-21 22:05:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 95 states have internal predecessors, (109), 11 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) [2023-11-21 22:05:24,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 142 transitions. [2023-11-21 22:05:24,803 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 142 transitions. Word has length 33 [2023-11-21 22:05:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:24,804 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 142 transitions. [2023-11-21 22:05:24,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:24,804 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 142 transitions. [2023-11-21 22:05:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:05:24,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:24,813 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:24,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:25,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:25,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1517894859, now seen corresponding path program 1 times [2023-11-21 22:05:25,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:25,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845266164] [2023-11-21 22:05:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:25,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:25,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 22:05:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:05:25,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:25,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845266164] [2023-11-21 22:05:25,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845266164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:25,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444449221] [2023-11-21 22:05:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:25,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:25,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:25,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:25,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:05:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:25,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:05:25,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:05:25,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:25,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444449221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:25,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:05:25,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2023-11-21 22:05:25,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779899248] [2023-11-21 22:05:25,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:25,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:05:25,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:25,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:05:25,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:05:25,484 INFO L87 Difference]: Start difference. First operand 107 states and 142 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:05:25,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:25,696 INFO L93 Difference]: Finished difference Result 128 states and 170 transitions. [2023-11-21 22:05:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:05:25,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-11-21 22:05:25,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:25,699 INFO L225 Difference]: With dead ends: 128 [2023-11-21 22:05:25,699 INFO L226 Difference]: Without dead ends: 119 [2023-11-21 22:05:25,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:05:25,701 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:25,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 105 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:05:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-21 22:05:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2023-11-21 22:05:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 97 states have internal predecessors, (113), 11 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2023-11-21 22:05:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 146 transitions. [2023-11-21 22:05:25,748 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 146 transitions. Word has length 34 [2023-11-21 22:05:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:25,748 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 146 transitions. [2023-11-21 22:05:25,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:05:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 146 transitions. [2023-11-21 22:05:25,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:05:25,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:25,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:25,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:25,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:25,953 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:25,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:25,953 INFO L85 PathProgramCache]: Analyzing trace with hash -185407541, now seen corresponding path program 2 times [2023-11-21 22:05:25,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:25,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388963035] [2023-11-21 22:05:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:25,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:26,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:26,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-21 22:05:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:05:26,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388963035] [2023-11-21 22:05:26,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388963035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924334817] [2023-11-21 22:05:26,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:05:26,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:26,275 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:26,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:05:26,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:05:26,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:26,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 22:05:26,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:05:26,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:05:26,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924334817] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:26,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:26,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-11-21 22:05:26,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588704838] [2023-11-21 22:05:26,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:26,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:05:26,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:26,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:05:26,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:05:26,749 INFO L87 Difference]: Start difference. First operand 111 states and 146 transitions. Second operand has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:27,256 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2023-11-21 22:05:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:05:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2023-11-21 22:05:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:27,258 INFO L225 Difference]: With dead ends: 151 [2023-11-21 22:05:27,259 INFO L226 Difference]: Without dead ends: 111 [2023-11-21 22:05:27,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:05:27,260 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:27,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 252 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:05:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-21 22:05:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2023-11-21 22:05:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 87 states have (on average 1.206896551724138) internal successors, (105), 91 states have internal predecessors, (105), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-21 22:05:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 135 transitions. [2023-11-21 22:05:27,278 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 135 transitions. Word has length 34 [2023-11-21 22:05:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:27,279 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 135 transitions. [2023-11-21 22:05:27,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 135 transitions. [2023-11-21 22:05:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-21 22:05:27,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:27,280 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:27,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:27,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:27,499 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:27,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:27,500 INFO L85 PathProgramCache]: Analyzing trace with hash -999999466, now seen corresponding path program 5 times [2023-11-21 22:05:27,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:27,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760124385] [2023-11-21 22:05:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:27,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:27,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:27,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-21 22:05:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:05:27,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:27,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760124385] [2023-11-21 22:05:27,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760124385] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:27,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718617755] [2023-11-21 22:05:27,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:05:27,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:27,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:27,772 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:27,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:05:27,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-21 22:05:27,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:27,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:05:27,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:05:28,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:05:28,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718617755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:28,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:28,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2023-11-21 22:05:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615245044] [2023-11-21 22:05:28,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:28,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:05:28,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:28,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:05:28,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:05:28,292 INFO L87 Difference]: Start difference. First operand 104 states and 135 transitions. Second operand has 16 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:28,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:28,734 INFO L93 Difference]: Finished difference Result 156 states and 201 transitions. [2023-11-21 22:05:28,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:05:28,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-11-21 22:05:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:28,737 INFO L225 Difference]: With dead ends: 156 [2023-11-21 22:05:28,737 INFO L226 Difference]: Without dead ends: 101 [2023-11-21 22:05:28,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:05:28,739 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:28,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 228 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:05:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-21 22:05:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2023-11-21 22:05:28,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 82 states have internal predecessors, (94), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-21 22:05:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2023-11-21 22:05:28,756 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 37 [2023-11-21 22:05:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:28,757 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2023-11-21 22:05:28,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2023-11-21 22:05:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-21 22:05:28,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:28,758 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:28,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:28,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 22:05:28,978 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:28,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash 346469234, now seen corresponding path program 3 times [2023-11-21 22:05:28,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:28,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270846234] [2023-11-21 22:05:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:28,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:29,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:29,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 22:05:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:05:29,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:29,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270846234] [2023-11-21 22:05:29,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270846234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:29,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711498106] [2023-11-21 22:05:29,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:05:29,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:29,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:29,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:29,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:05:29,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-21 22:05:29,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:29,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-21 22:05:29,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:29,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2023-11-21 22:05:29,858 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 [2023-11-21 22:05:29,893 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2023-11-21 22:05:29,893 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 1 case distinctions, treesize of input 28 treesize of output 24 [2023-11-21 22:05:30,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2023-11-21 22:05:30,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-21 22:05:30,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:05:30,424 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2023-11-21 22:05:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:05:30,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:30,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2023-11-21 22:05:30,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-11-21 22:05:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:05:30,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711498106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:30,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:30,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 23 [2023-11-21 22:05:30,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255791293] [2023-11-21 22:05:30,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:30,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-21 22:05:30,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:30,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-21 22:05:30,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:05:30,688 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:31,808 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2023-11-21 22:05:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:05:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2023-11-21 22:05:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:31,811 INFO L225 Difference]: With dead ends: 111 [2023-11-21 22:05:31,811 INFO L226 Difference]: Without dead ends: 108 [2023-11-21 22:05:31,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2023-11-21 22:05:31,813 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 42 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:31,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 560 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:05:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-21 22:05:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2023-11-21 22:05:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 80 states have (on average 1.1875) internal successors, (95), 83 states have internal predecessors, (95), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-21 22:05:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2023-11-21 22:05:31,830 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 38 [2023-11-21 22:05:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:31,830 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2023-11-21 22:05:31,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:05:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2023-11-21 22:05:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-21 22:05:31,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:31,832 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:31,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:32,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 22:05:32,053 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:32,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:32,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2145979154, now seen corresponding path program 4 times [2023-11-21 22:05:32,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:32,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009542677] [2023-11-21 22:05:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:32,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:32,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:32,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 22:05:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-21 22:05:32,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:32,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009542677] [2023-11-21 22:05:32,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009542677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:32,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932269442] [2023-11-21 22:05:32,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:05:32,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:32,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:32,593 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:32,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:05:32,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:05:32,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:32,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-21 22:05:32,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:05:33,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-21 22:05:33,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932269442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:33,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:33,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 33 [2023-11-21 22:05:33,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835659292] [2023-11-21 22:05:33,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:33,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-21 22:05:33,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:33,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-21 22:05:33,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 22:05:33,609 INFO L87 Difference]: Start difference. First operand 95 states and 119 transitions. Second operand has 33 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 30 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:35,091 INFO L93 Difference]: Finished difference Result 177 states and 233 transitions. [2023-11-21 22:05:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 22:05:35,092 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 30 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-11-21 22:05:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:35,094 INFO L225 Difference]: With dead ends: 177 [2023-11-21 22:05:35,094 INFO L226 Difference]: Without dead ends: 174 [2023-11-21 22:05:35,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2023-11-21 22:05:35,096 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 72 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:35,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 737 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 22:05:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-21 22:05:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 134. [2023-11-21 22:05:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 118 states have internal predecessors, (136), 11 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-11-21 22:05:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2023-11-21 22:05:35,121 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 39 [2023-11-21 22:05:35,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:35,121 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2023-11-21 22:05:35,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 30 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2023-11-21 22:05:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 22:05:35,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:35,123 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:35,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:35,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 22:05:35,339 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:35,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2102467854, now seen corresponding path program 5 times [2023-11-21 22:05:35,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:35,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818611226] [2023-11-21 22:05:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:35,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:36,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:36,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 22:05:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:05:36,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:36,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818611226] [2023-11-21 22:05:36,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818611226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739816382] [2023-11-21 22:05:36,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:05:36,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:36,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:36,822 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:36,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 22:05:37,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-21 22:05:37,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:37,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-21 22:05:37,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:37,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-21 22:05:37,073 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 [2023-11-21 22:05:37,079 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 [2023-11-21 22:05:37,124 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-21 22:05:37,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-21 22:05:37,237 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 22 [2023-11-21 22:05:37,255 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 27 treesize of output 15 [2023-11-21 22:05:37,367 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-11-21 22:05:37,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-11-21 22:05:37,499 INFO L349 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-11-21 22:05:37,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 44 [2023-11-21 22:05:37,506 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 0 case distinctions, treesize of input 38 treesize of output 40 [2023-11-21 22:05:38,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 120 [2023-11-21 22:05:38,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 88 [2023-11-21 22:05:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:05:38,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:38,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 100 [2023-11-21 22:05:38,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 68 [2023-11-21 22:05:42,113 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:05:42,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1034 treesize of output 970 [2023-11-21 22:05:42,125 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:05:42,155 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:05:42,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9142 treesize of output 8630 [2023-11-21 22:05:42,232 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:05:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:05:42,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739816382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:42,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:42,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2023-11-21 22:05:42,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039727120] [2023-11-21 22:05:42,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:42,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-21 22:05:42,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:42,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-21 22:05:42,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1094, Unknown=1, NotChecked=0, Total=1190 [2023-11-21 22:05:42,916 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:05:44,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:44,910 INFO L93 Difference]: Finished difference Result 194 states and 241 transitions. [2023-11-21 22:05:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:05:44,911 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2023-11-21 22:05:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:44,913 INFO L225 Difference]: With dead ends: 194 [2023-11-21 22:05:44,913 INFO L226 Difference]: Without dead ends: 186 [2023-11-21 22:05:44,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=138, Invalid=1421, Unknown=1, NotChecked=0, Total=1560 [2023-11-21 22:05:44,915 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:44,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 838 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-21 22:05:44,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-21 22:05:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 167. [2023-11-21 22:05:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 147 states have internal predecessors, (168), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) [2023-11-21 22:05:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 211 transitions. [2023-11-21 22:05:44,960 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 211 transitions. Word has length 40 [2023-11-21 22:05:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:44,960 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 211 transitions. [2023-11-21 22:05:44,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:05:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 211 transitions. [2023-11-21 22:05:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-21 22:05:44,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:44,962 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:44,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:45,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:05:45,183 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:45,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash 374135750, now seen corresponding path program 6 times [2023-11-21 22:05:45,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:45,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089032656] [2023-11-21 22:05:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:45,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:45,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:45,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-21 22:05:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:05:45,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:45,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089032656] [2023-11-21 22:05:45,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089032656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:45,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205072657] [2023-11-21 22:05:45,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 22:05:45,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:45,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:45,534 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:45,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 22:05:45,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-21 22:05:45,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:45,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 22:05:45,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:05:45,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:05:46,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205072657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:46,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:46,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2023-11-21 22:05:46,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336526097] [2023-11-21 22:05:46,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:46,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-21 22:05:46,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:46,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-21 22:05:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:05:46,138 INFO L87 Difference]: Start difference. First operand 167 states and 211 transitions. Second operand has 20 states, 17 states have (on average 3.235294117647059) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:46,820 INFO L93 Difference]: Finished difference Result 216 states and 281 transitions. [2023-11-21 22:05:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 22:05:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.235294117647059) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-11-21 22:05:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:46,825 INFO L225 Difference]: With dead ends: 216 [2023-11-21 22:05:46,825 INFO L226 Difference]: Without dead ends: 179 [2023-11-21 22:05:46,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2023-11-21 22:05:46,826 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:46,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 274 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:05:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-21 22:05:46,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 159. [2023-11-21 22:05:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 140 states have internal predecessors, (159), 14 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2023-11-21 22:05:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 199 transitions. [2023-11-21 22:05:46,864 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 199 transitions. Word has length 41 [2023-11-21 22:05:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:46,864 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 199 transitions. [2023-11-21 22:05:46,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.235294117647059) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 199 transitions. [2023-11-21 22:05:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 22:05:46,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:46,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:46,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:47,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:05:47,081 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:47,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:47,081 INFO L85 PathProgramCache]: Analyzing trace with hash -440579315, now seen corresponding path program 1 times [2023-11-21 22:05:47,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:47,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927538105] [2023-11-21 22:05:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:47,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:47,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:47,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 22:05:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:47,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-21 22:05:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 22:05:47,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:47,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927538105] [2023-11-21 22:05:47,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927538105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:47,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832403961] [2023-11-21 22:05:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:47,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:47,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:47,292 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:47,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 22:05:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:47,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:05:47,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:05:47,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:47,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832403961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:47,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:05:47,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-21 22:05:47,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895002152] [2023-11-21 22:05:47,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:47,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:05:47,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:47,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:05:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:05:47,519 INFO L87 Difference]: Start difference. First operand 159 states and 199 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:05:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:47,680 INFO L93 Difference]: Finished difference Result 213 states and 259 transitions. [2023-11-21 22:05:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:05:47,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-11-21 22:05:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:47,683 INFO L225 Difference]: With dead ends: 213 [2023-11-21 22:05:47,683 INFO L226 Difference]: Without dead ends: 141 [2023-11-21 22:05:47,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:05:47,685 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:47,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 92 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:05:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-21 22:05:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2023-11-21 22:05:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 106 states have internal predecessors, (117), 7 states have call successors, (7), 4 states have call predecessors, (7), 8 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2023-11-21 22:05:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2023-11-21 22:05:47,711 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 43 [2023-11-21 22:05:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:47,711 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2023-11-21 22:05:47,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:05:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2023-11-21 22:05:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 22:05:47,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:47,713 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:47,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:47,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:05:47,927 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:47,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash 353800421, now seen corresponding path program 1 times [2023-11-21 22:05:47,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:47,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980921066] [2023-11-21 22:05:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:48,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:48,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 22:05:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:48,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:05:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-21 22:05:48,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980921066] [2023-11-21 22:05:48,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980921066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:48,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:48,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:05:48,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270427093] [2023-11-21 22:05:48,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:48,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:05:48,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:05:48,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:05:48,192 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:05:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:48,386 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2023-11-21 22:05:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:05:48,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-11-21 22:05:48,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:48,387 INFO L225 Difference]: With dead ends: 141 [2023-11-21 22:05:48,388 INFO L226 Difference]: Without dead ends: 138 [2023-11-21 22:05:48,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:05:48,388 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:48,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 112 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:05:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-21 22:05:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2023-11-21 22:05:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 115 states have internal predecessors, (129), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-21 22:05:48,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 151 transitions. [2023-11-21 22:05:48,409 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 151 transitions. Word has length 45 [2023-11-21 22:05:48,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:48,410 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 151 transitions. [2023-11-21 22:05:48,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:05:48,410 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 151 transitions. [2023-11-21 22:05:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 22:05:48,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:48,411 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:48,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 22:05:48,412 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:48,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:48,412 INFO L85 PathProgramCache]: Analyzing trace with hash -481356455, now seen corresponding path program 7 times [2023-11-21 22:05:48,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:48,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063401919] [2023-11-21 22:05:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:48,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:48,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:48,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:05:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:05:48,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063401919] [2023-11-21 22:05:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063401919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741164807] [2023-11-21 22:05:48,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 22:05:48,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:48,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:48,678 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:48,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-21 22:05:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:48,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-21 22:05:48,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:05:48,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:05:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741164807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:49,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:49,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-21 22:05:49,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697987221] [2023-11-21 22:05:49,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:05:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:05:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:05:49,206 INFO L87 Difference]: Start difference. First operand 129 states and 151 transitions. Second operand has 17 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:49,654 INFO L93 Difference]: Finished difference Result 187 states and 226 transitions. [2023-11-21 22:05:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 22:05:49,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2023-11-21 22:05:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:49,657 INFO L225 Difference]: With dead ends: 187 [2023-11-21 22:05:49,657 INFO L226 Difference]: Without dead ends: 136 [2023-11-21 22:05:49,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:05:49,658 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:49,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 247 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:05:49,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-21 22:05:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2023-11-21 22:05:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 97 states have internal predecessors, (109), 7 states have call successors, (7), 4 states have call predecessors, (7), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-21 22:05:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2023-11-21 22:05:49,679 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 44 [2023-11-21 22:05:49,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:49,679 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2023-11-21 22:05:49,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:05:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2023-11-21 22:05:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 22:05:49,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:49,681 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:49,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:49,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 22:05:49,895 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:49,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:49,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1918712357, now seen corresponding path program 1 times [2023-11-21 22:05:49,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:49,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275296947] [2023-11-21 22:05:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:49,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:50,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:05:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:50,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 22:05:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:50,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:05:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-21 22:05:50,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:50,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275296947] [2023-11-21 22:05:50,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275296947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:50,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617146470] [2023-11-21 22:05:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:50,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:50,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:50,436 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:50,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02caaced-cad4-450b-bf05-67e992332eae/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 22:05:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:50,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-21 22:05:50,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:51,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-21 22:05:51,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2023-11-21 22:05:51,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-21 22:05:51,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-21 22:05:51,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-21 22:05:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:05:51,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:51,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:05:51,783 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 109 [2023-11-21 22:05:51,842 INFO L349 Elim1Store]: treesize reduction 10, result has 70.6 percent of original size [2023-11-21 22:05:51,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 129 [2023-11-21 22:05:51,957 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-21 22:05:51,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 11 [2023-11-21 22:05:52,028 INFO L349 Elim1Store]: treesize reduction 19, result has 80.6 percent of original size [2023-11-21 22:05:52,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 137 [2023-11-21 22:05:52,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2023-11-21 22:05:52,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-21 22:05:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-21 22:05:52,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617146470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:52,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:52,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-11-21 22:05:52,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406201217] [2023-11-21 22:05:52,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:52,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 22:05:52,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 22:05:52,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:05:52,314 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-21 22:05:54,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:05:56,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]