./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/discover_list.c --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_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/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_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/discover_list.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/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_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/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 b98ece0168fde0a9f5db629b0589397995dd8e9526df8a73dd8042a19f16d948 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:00:09,568 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:00:09,648 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 21:00:09,655 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:00:09,656 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:00:09,684 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:00:09,685 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:00:09,686 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:00:09,687 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 21:00:09,688 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 21:00:09,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:00:09,690 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:00:09,691 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:00:09,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:00:09,693 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:00:09,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:00:09,695 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 21:00:09,695 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:00:09,696 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:00:09,697 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:00:09,698 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:00:09,699 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 21:00:09,699 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:00:09,700 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 21:00:09,701 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:00:09,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 21:00:09,702 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:00:09,703 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:00:09,704 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:00:09,705 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:00:09,705 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:00:09,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:09,707 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:00:09,707 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:00:09,708 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 21:00:09,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:00:09,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:00:09,710 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:00:09,711 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:00:09,711 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 21:00:09,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:00:09,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:00:09,713 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_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b98ece0168fde0a9f5db629b0589397995dd8e9526df8a73dd8042a19f16d948 [2023-11-21 21:00:10,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:00:10,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:00:10,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:00:10,134 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:00:10,136 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:00:10,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/loops-crafted-1/discover_list.c [2023-11-21 21:00:13,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:00:13,699 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:00:13,699 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/sv-benchmarks/c/loops-crafted-1/discover_list.c [2023-11-21 21:00:13,712 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/data/60a5bf29c/67a9e4c36a1743079c45c77c372a3be6/FLAGa41b71305 [2023-11-21 21:00:13,727 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/data/60a5bf29c/67a9e4c36a1743079c45c77c372a3be6 [2023-11-21 21:00:13,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:00:13,732 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:00:13,734 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:13,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:00:13,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:00:13,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:13" (1/1) ... [2023-11-21 21:00:13,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f08854e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:13, skipping insertion in model container [2023-11-21 21:00:13,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:13" (1/1) ... [2023-11-21 21:00:13,783 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:00:14,014 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_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/sv-benchmarks/c/loops-crafted-1/discover_list.c[4997,5010] [2023-11-21 21:00:14,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:14,143 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:00:14,172 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_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/sv-benchmarks/c/loops-crafted-1/discover_list.c[4997,5010] [2023-11-21 21:00:14,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:14,273 WARN L675 CHandler]: The function smp_send_req is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 21:00:14,273 WARN L675 CHandler]: The function toupper is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 21:00:14,273 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 21:00:14,283 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:00:14,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14 WrapperNode [2023-11-21 21:00:14,284 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:14,285 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:14,285 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:00:14,286 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:00:14,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,333 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,401 INFO L138 Inliner]: procedures = 36, calls = 642, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 508 [2023-11-21 21:00:14,402 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:14,403 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:00:14,403 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:00:14,403 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:00:14,416 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,424 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,443 WARN L106 HeapSplitter]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure #Ultimate.C_memset is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2023-11-21 21:00:14,443 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,491 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,508 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,514 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:00:14,515 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:00:14,515 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:00:14,515 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:00:14,516 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (1/1) ... [2023-11-21 21:00:14,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:14,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:14,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:00:14,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:00:14,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:00:14,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 21:00:14,632 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-21 21:00:14,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 21:00:14,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 21:00:14,634 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2023-11-21 21:00:14,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-21 21:00:14,635 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-21 21:00:14,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 21:00:14,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 21:00:14,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:00:14,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:00:14,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 21:00:14,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 21:00:14,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:00:14,798 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:00:14,801 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:00:15,536 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:00:15,800 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:00:15,800 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 21:00:15,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:15 BoogieIcfgContainer [2023-11-21 21:00:15,802 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:00:15,807 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:00:15,807 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:00:15,810 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:00:15,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:00:13" (1/3) ... [2023-11-21 21:00:15,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cefe4e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:15, skipping insertion in model container [2023-11-21 21:00:15,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:14" (2/3) ... [2023-11-21 21:00:15,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cefe4e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:15, skipping insertion in model container [2023-11-21 21:00:15,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:15" (3/3) ... [2023-11-21 21:00:15,817 INFO L112 eAbstractionObserver]: Analyzing ICFG discover_list.c [2023-11-21 21:00:15,842 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:00:15,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 21:00:15,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:00:15,905 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;@327e4a3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:00:15,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 21:00:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 37 states have internal predecessors, (53), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-21 21:00:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 21:00:15,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:15,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:15,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:15,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:15,927 INFO L85 PathProgramCache]: Analyzing trace with hash 933735144, now seen corresponding path program 1 times [2023-11-21 21:00:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:15,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848623078] [2023-11-21 21:00:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:15,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:16,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:16,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 21:00:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:16,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:16,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848623078] [2023-11-21 21:00:16,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848623078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:16,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252118291] [2023-11-21 21:00:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:16,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:16,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:16,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:16,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 21:00:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:17,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 21:00:17,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:17,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:00:17,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252118291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:17,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:00:17,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-21 21:00:17,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336790209] [2023-11-21 21:00:17,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:17,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:00:17,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:00:17,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:00:17,361 INFO L87 Difference]: Start difference. First operand has 48 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 37 states have internal predecessors, (53), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 21:00:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:17,596 INFO L93 Difference]: Finished difference Result 96 states and 145 transitions. [2023-11-21 21:00:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:00:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-21 21:00:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:17,609 INFO L225 Difference]: With dead ends: 96 [2023-11-21 21:00:17,610 INFO L226 Difference]: Without dead ends: 45 [2023-11-21 21:00:17,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:00:17,621 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 1 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:17,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 155 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-21 21:00:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-21 21:00:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-21 21:00:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-11-21 21:00:17,692 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 24 [2023-11-21 21:00:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:17,693 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-11-21 21:00:17,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 21:00:17,694 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2023-11-21 21:00:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 21:00:17,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:17,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:17,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:17,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 21:00:17,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:17,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash 225587364, now seen corresponding path program 1 times [2023-11-21 21:00:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:17,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943883871] [2023-11-21 21:00:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:17,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:18,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:18,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 21:00:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:18,449 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 21:00:18,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:18,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943883871] [2023-11-21 21:00:18,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943883871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:18,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388701973] [2023-11-21 21:00:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:18,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:18,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:18,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:18,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 21:00:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:18,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 21:00:18,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:18,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:18,935 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 21:00:18,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388701973] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:18,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:18,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-21 21:00:18,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254360835] [2023-11-21 21:00:18,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:18,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 21:00:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 21:00:18,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-21 21:00:18,943 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 11 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 21:00:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:19,474 INFO L93 Difference]: Finished difference Result 97 states and 127 transitions. [2023-11-21 21:00:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 21:00:19,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-11-21 21:00:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:19,476 INFO L225 Difference]: With dead ends: 97 [2023-11-21 21:00:19,476 INFO L226 Difference]: Without dead ends: 53 [2023-11-21 21:00:19,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-21 21:00:19,479 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 13 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:19,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 152 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-21 21:00:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-21 21:00:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-21 21:00:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2023-11-21 21:00:19,493 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 26 [2023-11-21 21:00:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:19,493 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2023-11-21 21:00:19,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 21:00:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2023-11-21 21:00:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 21:00:19,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:19,495 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:19,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:19,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:19,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:19,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:19,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1872688216, now seen corresponding path program 2 times [2023-11-21 21:00:19,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:19,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964800285] [2023-11-21 21:00:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:20,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:20,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-21 21:00:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 21:00:20,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:20,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964800285] [2023-11-21 21:00:20,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964800285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:20,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073004719] [2023-11-21 21:00:20,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:00:20,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:20,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:20,379 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:20,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 21:00:20,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 21:00:20,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:00:20,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 21:00:20,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 21:00:20,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 21:00:20,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073004719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:20,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:20,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 16 [2023-11-21 21:00:20,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188643664] [2023-11-21 21:00:20,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:20,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 21:00:20,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 21:00:20,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-21 21:00:20,997 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 21:00:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:21,828 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2023-11-21 21:00:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 21:00:21,829 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2023-11-21 21:00:21,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:21,830 INFO L225 Difference]: With dead ends: 109 [2023-11-21 21:00:21,830 INFO L226 Difference]: Without dead ends: 60 [2023-11-21 21:00:21,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2023-11-21 21:00:21,833 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:21,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 200 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:00:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-21 21:00:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-21 21:00:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-21 21:00:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2023-11-21 21:00:21,857 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 30 [2023-11-21 21:00:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:21,857 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2023-11-21 21:00:21,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 21:00:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2023-11-21 21:00:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-21 21:00:21,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:21,863 INFO L195 NwaCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:21,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:22,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:22,077 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:22,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:22,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1397931414, now seen corresponding path program 3 times [2023-11-21 21:00:22,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:22,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210369429] [2023-11-21 21:00:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:22,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:22,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:22,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 21:00:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-21 21:00:22,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:22,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210369429] [2023-11-21 21:00:22,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210369429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:22,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857447608] [2023-11-21 21:00:22,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 21:00:22,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:22,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:22,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:22,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 21:00:24,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-21 21:00:24,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:00:24,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 21:00:24,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 56 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 21:00:24,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-21 21:00:25,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857447608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:25,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:25,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-11-21 21:00:25,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077995551] [2023-11-21 21:00:25,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:25,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-21 21:00:25,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:25,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-21 21:00:25,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2023-11-21 21:00:25,301 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 23 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 21:00:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:26,771 INFO L93 Difference]: Finished difference Result 119 states and 149 transitions. [2023-11-21 21:00:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 21:00:26,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-11-21 21:00:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:26,773 INFO L225 Difference]: With dead ends: 119 [2023-11-21 21:00:26,773 INFO L226 Difference]: Without dead ends: 67 [2023-11-21 21:00:26,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2023-11-21 21:00:26,776 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:26,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 343 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 21:00:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-21 21:00:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-21 21:00:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-21 21:00:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2023-11-21 21:00:26,793 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 37 [2023-11-21 21:00:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:26,794 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2023-11-21 21:00:26,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 21:00:26,795 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2023-11-21 21:00:26,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 21:00:26,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:26,796 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:26,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:27,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:27,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:27,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash 40612456, now seen corresponding path program 4 times [2023-11-21 21:00:27,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:27,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829154498] [2023-11-21 21:00:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:27,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:27,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:28,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 21:00:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-21 21:00:28,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:28,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829154498] [2023-11-21 21:00:28,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829154498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:28,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111806345] [2023-11-21 21:00:28,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 21:00:28,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:28,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:28,279 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:28,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 21:00:28,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 21:00:28,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:00:28,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-21 21:00:28,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 21:00:29,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-21 21:00:29,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111806345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:29,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:29,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2023-11-21 21:00:29,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619969567] [2023-11-21 21:00:29,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:29,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-21 21:00:29,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:29,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-21 21:00:29,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1421, Unknown=0, NotChecked=0, Total=1892 [2023-11-21 21:00:29,911 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 44 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 43 states have internal predecessors, (64), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 21:00:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:34,285 INFO L93 Difference]: Finished difference Result 141 states and 186 transitions. [2023-11-21 21:00:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-21 21:00:34,286 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 43 states have internal predecessors, (64), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2023-11-21 21:00:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:34,288 INFO L225 Difference]: With dead ends: 141 [2023-11-21 21:00:34,288 INFO L226 Difference]: Without dead ends: 84 [2023-11-21 21:00:34,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1499, Invalid=4051, Unknown=0, NotChecked=0, Total=5550 [2023-11-21 21:00:34,293 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 31 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:34,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 690 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-21 21:00:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-21 21:00:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-21 21:00:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-21 21:00:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2023-11-21 21:00:34,314 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 44 [2023-11-21 21:00:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:34,314 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2023-11-21 21:00:34,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 43 states have internal predecessors, (64), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 21:00:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2023-11-21 21:00:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-21 21:00:34,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:34,317 INFO L195 NwaCegarLoop]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:34,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:34,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:34,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:34,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:34,541 INFO L85 PathProgramCache]: Analyzing trace with hash 308780434, now seen corresponding path program 5 times [2023-11-21 21:00:34,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:34,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619280500] [2023-11-21 21:00:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:34,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:35,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:35,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-21 21:00:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 351 proven. 91 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-11-21 21:00:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:35,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619280500] [2023-11-21 21:00:35,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619280500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:35,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939439213] [2023-11-21 21:00:35,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 21:00:35,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:35,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:35,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:35,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4d2fd5-6c4e-4182-9d95-619e258ddb88/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 21:00:55,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-11-21 21:00:55,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:00:55,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-21 21:00:55,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:56,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-21 21:00:56,090 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-21 21:00:56,091 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 1 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 21:00:56,160 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-21 21:00:56,160 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 1 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 21:00:56,246 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-21 21:00:56,247 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 1 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 21:00:56,336 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-21 21:00:56,336 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 1 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 21:00:56,421 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-21 21:00:56,422 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 1 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 21:00:56,498 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-21 21:00:56,498 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 1 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 21:00:56,576 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-21 21:00:56,577 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 1 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 21:00:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 373 proven. 279 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-21 21:00:56,732 INFO L327 TraceCheckSpWp]: Computing backward predicates...