./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --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 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:19:19,625 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:19:19,696 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:19:19,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:19:19,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:19:19,734 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:19:19,735 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:19:19,735 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:19:19,736 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:19:19,737 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:19:19,738 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:19:19,738 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:19:19,738 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:19:19,739 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:19:19,741 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:19:19,742 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:19:19,742 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:19:19,742 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:19:19,742 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:19:19,743 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:19:19,743 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:19:19,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:19:19,747 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:19:19,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:19:19,748 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:19:19,748 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:19:19,748 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:19:19,748 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:19:19,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:19:19,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:19:19,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:19:19,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:19:19,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:19:19,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:19:19,750 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:19:19,750 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:19:19,751 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:19:19,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:19:19,751 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:19:19,751 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:19:19,752 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:19:19,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:19:19,752 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:/storage/repos/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:19:20,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:19:20,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:19:20,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:19:20,048 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:19:20,049 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:19:20,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-10-15 15:19:21,443 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:19:21,641 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:19:21,641 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-10-15 15:19:21,652 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/85ea807a0/b76533d8a5af440a811e0b228f8ac562/FLAGf247b1ed9 [2024-10-15 15:19:21,664 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/85ea807a0/b76533d8a5af440a811e0b228f8ac562 [2024-10-15 15:19:21,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:19:21,667 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:19:21,668 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:19:21,668 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:19:21,673 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:19:21,674 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:19:21" (1/1) ... [2024-10-15 15:19:21,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52591e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:21, skipping insertion in model container [2024-10-15 15:19:21,675 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:19:21" (1/1) ... [2024-10-15 15:19:21,698 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:19:21,895 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2024-10-15 15:19:21,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:19:21,983 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:19:21,994 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2024-10-15 15:19:22,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:19:22,039 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:19:22,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22 WrapperNode [2024-10-15 15:19:22,040 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:19:22,041 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:19:22,041 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:19:22,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:19:22,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,065 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,076 INFO L138 Inliner]: procedures = 17, calls = 173, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:19:22,076 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:19:22,077 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:19:22,077 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:19:22,077 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:19:22,091 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,100 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,139 INFO L175 MemorySlicer]: Split 139 memory accesses to 6 slices as follows [2, 30, 21, 22, 35, 29]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 2, 1, 2, 3, 3]. [2024-10-15 15:19:22,139 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,139 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,158 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,164 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,166 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,177 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:19:22,181 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:19:22,181 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:19:22,182 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:19:22,182 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (1/1) ... [2024-10-15 15:19:22,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:19:22,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:22,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-15 15:19:22,225 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-15 15:19:22,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:19:22,276 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_33_0 [2024-10-15 15:19:22,276 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_33_0 [2024-10-15 15:19:22,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 15:19:22,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 15:19:22,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:19:22,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:19:22,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:19:22,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:19:22,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-15 15:19:22,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-15 15:19:22,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-15 15:19:22,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-15 15:19:22,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 15:19:22,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 15:19:22,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 15:19:22,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-15 15:19:22,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-15 15:19:22,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-15 15:19:22,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-15 15:19:22,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:19:22,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:19:22,281 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_53_0 [2024-10-15 15:19:22,281 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_53_0 [2024-10-15 15:19:22,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:19:22,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:19:22,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 15:19:22,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 15:19:22,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-15 15:19:22,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-15 15:19:22,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-15 15:19:22,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-15 15:19:22,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 15:19:22,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 15:19:22,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 15:19:22,409 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:19:22,411 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:19:22,773 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-10-15 15:19:22,773 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:19:22,794 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:19:22,795 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-15 15:19:22,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:19:22 BoogieIcfgContainer [2024-10-15 15:19:22,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:19:22,798 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:19:22,798 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:19:22,801 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:19:22,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:19:21" (1/3) ... [2024-10-15 15:19:22,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709f0353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:19:22, skipping insertion in model container [2024-10-15 15:19:22,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:22" (2/3) ... [2024-10-15 15:19:22,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709f0353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:19:22, skipping insertion in model container [2024-10-15 15:19:22,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:19:22" (3/3) ... [2024-10-15 15:19:22,803 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra-u.c [2024-10-15 15:19:22,817 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:19:22,818 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:19:22,862 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:19:22,868 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@ca1512d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:19:22,868 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:19:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-15 15:19:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-15 15:19:22,876 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:22,877 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:22,877 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:22,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash -795461761, now seen corresponding path program 1 times [2024-10-15 15:19:22,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:22,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445109166] [2024-10-15 15:19:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:22,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:23,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:19:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:23,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:19:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:23,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:19:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:19:23,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:23,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445109166] [2024-10-15 15:19:23,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445109166] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:19:23,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:19:23,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-15 15:19:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824786482] [2024-10-15 15:19:23,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:23,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-15 15:19:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:23,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-15 15:19:23,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 15:19:23,163 INFO L87 Difference]: Start difference. First operand has 54 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 15:19:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:23,392 INFO L93 Difference]: Finished difference Result 104 states and 150 transitions. [2024-10-15 15:19:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-15 15:19:23,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-10-15 15:19:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:23,404 INFO L225 Difference]: With dead ends: 104 [2024-10-15 15:19:23,405 INFO L226 Difference]: Without dead ends: 54 [2024-10-15 15:19:23,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 15:19:23,411 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:23,412 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:19:23,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-15 15:19:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-10-15 15:19:23,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-15 15:19:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-10-15 15:19:23,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 23 [2024-10-15 15:19:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:23,459 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-10-15 15:19:23,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 15:19:23,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:23,460 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-10-15 15:19:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-15 15:19:23,462 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:23,462 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:23,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 15:19:23,463 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:23,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:23,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1335693656, now seen corresponding path program 1 times [2024-10-15 15:19:23,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:23,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086999300] [2024-10-15 15:19:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:23,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:24,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:19:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:24,730 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:19:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:24,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:19:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:19:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086999300] [2024-10-15 15:19:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086999300] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:19:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:19:25,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-10-15 15:19:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868471913] [2024-10-15 15:19:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:25,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 15:19:25,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:25,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 15:19:25,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-10-15 15:19:25,019 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 14 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 15:19:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:25,995 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2024-10-15 15:19:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:19:25,997 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-10-15 15:19:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:26,001 INFO L225 Difference]: With dead ends: 83 [2024-10-15 15:19:26,001 INFO L226 Difference]: Without dead ends: 81 [2024-10-15 15:19:26,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:19:26,004 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:26,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 165 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 15:19:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-15 15:19:26,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2024-10-15 15:19:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 23 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (26), 21 states have call predecessors, (26), 21 states have call successors, (26) [2024-10-15 15:19:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2024-10-15 15:19:26,035 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 24 [2024-10-15 15:19:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:26,035 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2024-10-15 15:19:26,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 15:19:26,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2024-10-15 15:19:26,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-15 15:19:26,037 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:26,038 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:26,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 15:19:26,038 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:26,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:26,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1872287595, now seen corresponding path program 1 times [2024-10-15 15:19:26,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:26,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913400365] [2024-10-15 15:19:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:26,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:26,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543037864] [2024-10-15 15:19:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:26,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:26,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:26,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:19:26,078 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:19:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:26,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-15 15:19:26,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:26,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:26,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:26,323 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 [2024-10-15 15:19:26,330 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 [2024-10-15 15:19:26,685 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 19 treesize of output 11 [2024-10-15 15:19:26,690 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 15 treesize of output 7 [2024-10-15 15:19:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:19:26,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:30,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913400365] [2024-10-15 15:19:30,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543037864] [2024-10-15 15:19:30,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543037864] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:30,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:19:30,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-15 15:19:30,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588685719] [2024-10-15 15:19:30,930 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:19:30,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 15:19:30,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:30,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 15:19:30,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-10-15 15:19:30,932 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-15 15:19:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:31,749 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2024-10-15 15:19:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 15:19:31,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-10-15 15:19:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:31,754 INFO L225 Difference]: With dead ends: 99 [2024-10-15 15:19:31,755 INFO L226 Difference]: Without dead ends: 97 [2024-10-15 15:19:31,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-15 15:19:31,756 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:31,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 198 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 15:19:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-15 15:19:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2024-10-15 15:19:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 26 states have call successors, (26), 11 states have call predecessors, (26), 12 states have return successors, (28), 24 states have call predecessors, (28), 23 states have call successors, (28) [2024-10-15 15:19:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2024-10-15 15:19:31,799 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 30 [2024-10-15 15:19:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:31,799 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2024-10-15 15:19:31,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-15 15:19:31,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2024-10-15 15:19:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-15 15:19:31,801 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:31,801 INFO L215 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, 1, 1, 1, 1] [2024-10-15 15:19:31,812 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-15 15:19:32,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:32,004 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:32,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:32,004 INFO L85 PathProgramCache]: Analyzing trace with hash 687714431, now seen corresponding path program 1 times [2024-10-15 15:19:32,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:32,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56938998] [2024-10-15 15:19:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:32,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:33,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:19:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:33,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:19:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:33,041 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:19:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:33,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:19:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 15:19:33,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:33,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56938998] [2024-10-15 15:19:33,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56938998] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:33,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232144316] [2024-10-15 15:19:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:33,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:33,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:33,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:19:33,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:19:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:33,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-10-15 15:19:33,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:33,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:33,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:33,874 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 [2024-10-15 15:19:33,882 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 [2024-10-15 15:19:34,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:34,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2024-10-15 15:19:34,559 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 [2024-10-15 15:19:34,825 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 17 treesize of output 9 [2024-10-15 15:19:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 15:19:34,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:36,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232144316] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:36,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:19:36,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2024-10-15 15:19:36,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578827333] [2024-10-15 15:19:36,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:19:36,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-15 15:19:36,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:36,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-15 15:19:36,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 15:19:36,555 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-15 15:19:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:48,866 INFO L93 Difference]: Finished difference Result 136 states and 171 transitions. [2024-10-15 15:19:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-15 15:19:48,866 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 30 [2024-10-15 15:19:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:48,868 INFO L225 Difference]: With dead ends: 136 [2024-10-15 15:19:48,868 INFO L226 Difference]: Without dead ends: 134 [2024-10-15 15:19:48,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=295, Invalid=2895, Unknown=2, NotChecked=0, Total=3192 [2024-10-15 15:19:48,872 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 124 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1992 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:48,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 351 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1992 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-10-15 15:19:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-15 15:19:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 123. [2024-10-15 15:19:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 76 states have internal predecessors, (82), 33 states have call successors, (33), 14 states have call predecessors, (33), 16 states have return successors, (38), 32 states have call predecessors, (38), 30 states have call successors, (38) [2024-10-15 15:19:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 153 transitions. [2024-10-15 15:19:48,927 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 153 transitions. Word has length 30 [2024-10-15 15:19:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:48,927 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 153 transitions. [2024-10-15 15:19:48,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-15 15:19:48,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 153 transitions. [2024-10-15 15:19:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 15:19:48,931 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:48,931 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-15 15:19:48,949 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 15:19:49,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:49,133 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:49,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:49,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1967022502, now seen corresponding path program 2 times [2024-10-15 15:19:49,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:49,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686920282] [2024-10-15 15:19:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:49,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:50,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:19:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:50,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:19:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:50,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:19:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:50,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:19:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:51,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:19:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 15:19:51,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:51,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686920282] [2024-10-15 15:19:51,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686920282] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:51,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305401885] [2024-10-15 15:19:51,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:19:51,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:51,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:51,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:19:51,267 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 15:19:51,375 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:19:51,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:19:51,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-10-15 15:19:51,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:51,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:51,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:51,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:19:51,462 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 [2024-10-15 15:19:52,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:52,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2024-10-15 15:19:52,336 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 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:19:52,686 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 17 treesize of output 9 [2024-10-15 15:19:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 15:19:52,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:54,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305401885] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:54,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:19:54,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2024-10-15 15:19:54,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811760438] [2024-10-15 15:19:54,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:19:54,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-15 15:19:54,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:54,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-15 15:19:54,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1607, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 15:19:54,389 INFO L87 Difference]: Start difference. First operand 123 states and 153 transitions. Second operand has 35 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 12 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-15 15:20:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:07,867 INFO L93 Difference]: Finished difference Result 169 states and 213 transitions. [2024-10-15 15:20:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-15 15:20:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 12 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 36 [2024-10-15 15:20:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:07,870 INFO L225 Difference]: With dead ends: 169 [2024-10-15 15:20:07,870 INFO L226 Difference]: Without dead ends: 167 [2024-10-15 15:20:07,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=387, Invalid=4303, Unknown=2, NotChecked=0, Total=4692 [2024-10-15 15:20:07,872 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 118 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:07,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 573 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2696 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-10-15 15:20:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-15 15:20:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 133. [2024-10-15 15:20:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 83 states have internal predecessors, (89), 34 states have call successors, (34), 15 states have call predecessors, (34), 19 states have return successors, (41), 34 states have call predecessors, (41), 31 states have call successors, (41) [2024-10-15 15:20:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 164 transitions. [2024-10-15 15:20:07,934 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 164 transitions. Word has length 36 [2024-10-15 15:20:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:07,935 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 164 transitions. [2024-10-15 15:20:07,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 12 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-15 15:20:07,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 164 transitions. [2024-10-15 15:20:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 15:20:07,936 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:07,936 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:07,949 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 15:20:08,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:08,139 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:08,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:08,139 INFO L85 PathProgramCache]: Analyzing trace with hash -546904304, now seen corresponding path program 1 times [2024-10-15 15:20:08,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:08,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316658065] [2024-10-15 15:20:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:08,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:08,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663327254] [2024-10-15 15:20:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:08,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:08,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:08,165 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:20:08,166 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 15:20:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:08,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-10-15 15:20:08,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:08,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:08,309 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 [2024-10-15 15:20:08,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:20:08,322 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 [2024-10-15 15:20:08,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:08,711 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 43 treesize of output 19 [2024-10-15 15:20:08,734 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 26 treesize of output 14 [2024-10-15 15:20:08,740 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 15 treesize of output 7 [2024-10-15 15:20:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:20:08,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:25,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:25,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316658065] [2024-10-15 15:20:25,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:25,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663327254] [2024-10-15 15:20:25,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663327254] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:25,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:25,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-15 15:20:25,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244263396] [2024-10-15 15:20:25,341 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:25,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 15:20:25,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:25,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 15:20:25,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=104, Unknown=2, NotChecked=0, Total=132 [2024-10-15 15:20:25,345 INFO L87 Difference]: Start difference. First operand 133 states and 164 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-15 15:20:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:26,370 INFO L93 Difference]: Finished difference Result 168 states and 205 transitions. [2024-10-15 15:20:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 15:20:26,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2024-10-15 15:20:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:26,372 INFO L225 Difference]: With dead ends: 168 [2024-10-15 15:20:26,372 INFO L226 Difference]: Without dead ends: 166 [2024-10-15 15:20:26,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=71, Invalid=233, Unknown=2, NotChecked=0, Total=306 [2024-10-15 15:20:26,374 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:26,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 191 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 15:20:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-10-15 15:20:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2024-10-15 15:20:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 102 states have internal predecessors, (110), 43 states have call successors, (43), 18 states have call predecessors, (43), 22 states have return successors, (49), 43 states have call predecessors, (49), 39 states have call successors, (49) [2024-10-15 15:20:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 202 transitions. [2024-10-15 15:20:26,439 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 202 transitions. Word has length 36 [2024-10-15 15:20:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:26,439 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 202 transitions. [2024-10-15 15:20:26,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-15 15:20:26,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 202 transitions. [2024-10-15 15:20:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 15:20:26,441 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:26,441 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:26,460 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 15:20:26,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:26,646 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:26,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:26,646 INFO L85 PathProgramCache]: Analyzing trace with hash -274231684, now seen corresponding path program 1 times [2024-10-15 15:20:26,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:26,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087927663] [2024-10-15 15:20:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:26,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:26,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14773645] [2024-10-15 15:20:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:26,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:26,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:26,675 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:20:26,676 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 15:20:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:27,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-10-15 15:20:27,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:27,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:27,037 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 [2024-10-15 15:20:27,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:20:27,047 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 [2024-10-15 15:20:27,203 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 [2024-10-15 15:20:27,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:20:27,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2024-10-15 15:20:27,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:20:27,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-10-15 15:20:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:20:27,504 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:29,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:29,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087927663] [2024-10-15 15:20:29,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:29,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14773645] [2024-10-15 15:20:29,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14773645] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:29,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:29,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-10-15 15:20:29,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815014651] [2024-10-15 15:20:29,223 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:29,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 15:20:29,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:29,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 15:20:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-10-15 15:20:29,225 INFO L87 Difference]: Start difference. First operand 164 states and 202 transitions. Second operand has 14 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-15 15:20:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:30,324 INFO L93 Difference]: Finished difference Result 208 states and 252 transitions. [2024-10-15 15:20:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:20:30,325 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2024-10-15 15:20:30,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:30,327 INFO L225 Difference]: With dead ends: 208 [2024-10-15 15:20:30,327 INFO L226 Difference]: Without dead ends: 206 [2024-10-15 15:20:30,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:20:30,329 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 55 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 41 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:30,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 282 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 706 Invalid, 10 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 15:20:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-10-15 15:20:30,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 202. [2024-10-15 15:20:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 121 states have (on average 1.115702479338843) internal successors, (135), 125 states have internal predecessors, (135), 53 states have call successors, (53), 22 states have call predecessors, (53), 27 states have return successors, (60), 54 states have call predecessors, (60), 48 states have call successors, (60) [2024-10-15 15:20:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 248 transitions. [2024-10-15 15:20:30,438 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 248 transitions. Word has length 36 [2024-10-15 15:20:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:30,438 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 248 transitions. [2024-10-15 15:20:30,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-15 15:20:30,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 248 transitions. [2024-10-15 15:20:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 15:20:30,442 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:30,443 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:30,455 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-15 15:20:30,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-15 15:20:30,644 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:30,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2107888845, now seen corresponding path program 3 times [2024-10-15 15:20:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872643948] [2024-10-15 15:20:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:31,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:20:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:31,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:20:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:31,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:20:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:32,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:20:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:32,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:20:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:33,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:20:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:20:33,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:33,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872643948] [2024-10-15 15:20:33,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872643948] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:33,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787759115] [2024-10-15 15:20:33,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:20:33,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:33,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:20:33,459 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 15:20:33,762 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 15:20:33,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:20:33,766 WARN L253 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-10-15 15:20:33,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:33,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:33,785 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 50 [2024-10-15 15:20:33,858 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 11 treesize of output 7 [2024-10-15 15:20:33,864 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 11 [2024-10-15 15:20:33,871 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 11 treesize of output 7 [2024-10-15 15:20:33,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-10-15 15:20:34,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:20:34,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2024-10-15 15:20:34,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:20:35,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-15 15:20:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 15:20:35,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:37,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787759115] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:37,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:20:37,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2024-10-15 15:20:37,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868385910] [2024-10-15 15:20:37,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:37,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-15 15:20:37,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:37,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-15 15:20:37,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1947, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 15:20:37,067 INFO L87 Difference]: Start difference. First operand 202 states and 248 transitions. Second operand has 39 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 13 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2024-10-15 15:20:46,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:21:01,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:21:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:02,123 INFO L93 Difference]: Finished difference Result 254 states and 316 transitions. [2024-10-15 15:21:02,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-15 15:21:02,123 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 13 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 42 [2024-10-15 15:21:02,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:02,125 INFO L225 Difference]: With dead ends: 254 [2024-10-15 15:21:02,126 INFO L226 Difference]: Without dead ends: 252 [2024-10-15 15:21:02,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=589, Invalid=6549, Unknown=2, NotChecked=0, Total=7140 [2024-10-15 15:21:02,128 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 154 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 126 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 3354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:02,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 711 Invalid, 3354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 3226 Invalid, 2 Unknown, 0 Unchecked, 11.6s Time] [2024-10-15 15:21:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-10-15 15:21:02,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 212. [2024-10-15 15:21:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 127 states have (on average 1.1181102362204725) internal successors, (142), 132 states have internal predecessors, (142), 54 states have call successors, (54), 23 states have call predecessors, (54), 30 states have return successors, (63), 56 states have call predecessors, (63), 49 states have call successors, (63) [2024-10-15 15:21:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 259 transitions. [2024-10-15 15:21:02,244 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 259 transitions. Word has length 42 [2024-10-15 15:21:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:02,245 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 259 transitions. [2024-10-15 15:21:02,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 13 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2024-10-15 15:21:02,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 259 transitions. [2024-10-15 15:21:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 15:21:02,246 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:02,246 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:02,259 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-15 15:21:02,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:02,450 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:02,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:02,450 INFO L85 PathProgramCache]: Analyzing trace with hash 21325385, now seen corresponding path program 1 times [2024-10-15 15:21:02,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:02,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128287823] [2024-10-15 15:21:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:02,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:21:02,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095327270] [2024-10-15 15:21:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:02,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:02,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:02,484 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:21:02,485 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 15:21:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:02,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-10-15 15:21:02,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:02,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:21:02,665 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 [2024-10-15 15:21:02,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:21:02,673 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 [2024-10-15 15:21:02,678 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 [2024-10-15 15:21:03,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:03,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 47 [2024-10-15 15:21:03,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:03,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 40 [2024-10-15 15:21:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:21:03,819 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:16,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:16,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128287823] [2024-10-15 15:21:16,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:16,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095327270] [2024-10-15 15:21:16,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095327270] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:16,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:16,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-10-15 15:21:16,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218558447] [2024-10-15 15:21:16,474 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:16,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 15:21:16,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:16,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 15:21:16,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=199, Unknown=3, NotChecked=0, Total=240 [2024-10-15 15:21:16,475 INFO L87 Difference]: Start difference. First operand 212 states and 259 transitions. Second operand has 14 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-15 15:21:18,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:18,107 INFO L93 Difference]: Finished difference Result 220 states and 265 transitions. [2024-10-15 15:21:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 15:21:18,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2024-10-15 15:21:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:18,109 INFO L225 Difference]: With dead ends: 220 [2024-10-15 15:21:18,109 INFO L226 Difference]: Without dead ends: 218 [2024-10-15 15:21:18,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=93, Invalid=456, Unknown=3, NotChecked=0, Total=552 [2024-10-15 15:21:18,110 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:18,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 272 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 489 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2024-10-15 15:21:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-10-15 15:21:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2024-10-15 15:21:18,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 130 states have (on average 1.1153846153846154) internal successors, (145), 135 states have internal predecessors, (145), 54 states have call successors, (54), 24 states have call predecessors, (54), 31 states have return successors, (63), 56 states have call predecessors, (63), 49 states have call successors, (63) [2024-10-15 15:21:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 262 transitions. [2024-10-15 15:21:18,198 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 262 transitions. Word has length 42 [2024-10-15 15:21:18,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:18,198 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 262 transitions. [2024-10-15 15:21:18,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-15 15:21:18,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 262 transitions. [2024-10-15 15:21:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 15:21:18,199 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:18,199 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:18,213 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-15 15:21:18,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:18,400 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:18,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1606878135, now seen corresponding path program 1 times [2024-10-15 15:21:18,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:18,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257411206] [2024-10-15 15:21:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:18,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:21:18,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358926347] [2024-10-15 15:21:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:18,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:18,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:18,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:21:18,432 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 15:21:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:18,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-10-15 15:21:18,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:18,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:21:18,589 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 [2024-10-15 15:21:18,593 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 [2024-10-15 15:21:18,597 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 [2024-10-15 15:21:18,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:21:18,795 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 [2024-10-15 15:21:19,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:19,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2024-10-15 15:21:31,354 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 [2024-10-15 15:21:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:21:31,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:44,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:44,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257411206] [2024-10-15 15:21:44,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:44,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358926347] [2024-10-15 15:21:44,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358926347] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:44,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:44,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-15 15:21:44,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857982272] [2024-10-15 15:21:44,024 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:44,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 15:21:44,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:44,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 15:21:44,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=223, Unknown=5, NotChecked=0, Total=272 [2024-10-15 15:21:44,025 INFO L87 Difference]: Start difference. First operand 216 states and 262 transitions. Second operand has 15 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:21:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:45,778 INFO L93 Difference]: Finished difference Result 228 states and 271 transitions. [2024-10-15 15:21:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:21:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2024-10-15 15:21:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:45,781 INFO L225 Difference]: With dead ends: 228 [2024-10-15 15:21:45,781 INFO L226 Difference]: Without dead ends: 226 [2024-10-15 15:21:45,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=97, Invalid=404, Unknown=5, NotChecked=0, Total=506 [2024-10-15 15:21:45,782 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 53 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 39 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:45,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 359 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 811 Invalid, 20 Unknown, 0 Unchecked, 1.3s Time] [2024-10-15 15:21:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-10-15 15:21:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 220. [2024-10-15 15:21:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 133 states have (on average 1.112781954887218) internal successors, (148), 138 states have internal predecessors, (148), 54 states have call successors, (54), 25 states have call predecessors, (54), 32 states have return successors, (63), 56 states have call predecessors, (63), 49 states have call successors, (63) [2024-10-15 15:21:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 265 transitions. [2024-10-15 15:21:45,888 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 265 transitions. Word has length 42 [2024-10-15 15:21:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:45,889 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 265 transitions. [2024-10-15 15:21:45,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:21:45,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 265 transitions. [2024-10-15 15:21:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 15:21:45,890 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:45,890 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:45,906 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-15 15:21:46,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:46,091 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:46,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:46,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1240630883, now seen corresponding path program 2 times [2024-10-15 15:21:46,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:46,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115734553] [2024-10-15 15:21:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:46,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:21:46,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77841363] [2024-10-15 15:21:46,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:21:46,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:46,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:46,112 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:21:46,116 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 15:21:46,293 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:21:46,293 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:21:46,297 WARN L253 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-10-15 15:21:46,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:46,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:21:46,325 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 [2024-10-15 15:21:46,334 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 [2024-10-15 15:21:46,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:21:46,897 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 [2024-10-15 15:21:47,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:47,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2024-10-15 15:21:47,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:47,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2024-10-15 15:21:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 15:21:47,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:47,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:47,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115734553] [2024-10-15 15:21:47,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:47,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77841363] [2024-10-15 15:21:47,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77841363] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:47,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:47,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 15:21:47,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962260244] [2024-10-15 15:21:47,700 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:47,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 15:21:47,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:47,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 15:21:47,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:21:47,701 INFO L87 Difference]: Start difference. First operand 220 states and 265 transitions. Second operand has 18 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:21:50,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:50,554 INFO L93 Difference]: Finished difference Result 268 states and 320 transitions. [2024-10-15 15:21:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 15:21:50,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2024-10-15 15:21:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:50,558 INFO L225 Difference]: With dead ends: 268 [2024-10-15 15:21:50,558 INFO L226 Difference]: Without dead ends: 266 [2024-10-15 15:21:50,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:21:50,561 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 47 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 37 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:50,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 382 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1121 Invalid, 6 Unknown, 0 Unchecked, 2.1s Time] [2024-10-15 15:21:50,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-10-15 15:21:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2024-10-15 15:21:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 157 states have (on average 1.10828025477707) internal successors, (174), 162 states have internal predecessors, (174), 64 states have call successors, (64), 29 states have call predecessors, (64), 38 states have return successors, (75), 68 states have call predecessors, (75), 58 states have call successors, (75) [2024-10-15 15:21:50,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 313 transitions. [2024-10-15 15:21:50,707 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 313 transitions. Word has length 42 [2024-10-15 15:21:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:50,707 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 313 transitions. [2024-10-15 15:21:50,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:21:50,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 313 transitions. [2024-10-15 15:21:50,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:21:50,709 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:50,709 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:50,717 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-15 15:21:50,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-15 15:21:50,913 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:50,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash -211633676, now seen corresponding path program 4 times [2024-10-15 15:21:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:50,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731731541] [2024-10-15 15:21:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:50,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:51,991 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:21:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:51,993 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:21:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:52,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:21:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:52,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:21:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:53,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:21:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:53,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:21:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:54,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:21:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 15:21:54,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:54,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731731541] [2024-10-15 15:21:54,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731731541] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:54,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519938630] [2024-10-15 15:21:54,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 15:21:54,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:54,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:54,595 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:21:54,596 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 15:21:54,715 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 15:21:54,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:21:54,718 WARN L253 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 171 conjuncts are in the unsatisfiable core [2024-10-15 15:21:54,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:54,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:21:54,735 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 98 treesize of output 94 [2024-10-15 15:21:54,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:21:54,822 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 11 treesize of output 7 [2024-10-15 15:21:54,827 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 11 treesize of output 7 [2024-10-15 15:21:54,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-10-15 15:21:56,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:56,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2024-10-15 15:21:56,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:21:56,523 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 17 treesize of output 9 [2024-10-15 15:21:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 15:21:56,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:59,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519938630] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:59,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:21:59,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 43 [2024-10-15 15:21:59,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405166142] [2024-10-15 15:21:59,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:59,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-15 15:21:59,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-15 15:21:59,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 15:21:59,185 INFO L87 Difference]: Start difference. First operand 260 states and 313 transitions. Second operand has 43 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 35 states have internal predecessors, (43), 14 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2024-10-15 15:22:05,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:22:17,424 WARN L286 SmtUtils]: Spent 10.81s on a formula simplification. DAG size of input: 130 DAG size of output: 74 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-15 15:22:22,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:22:35,348 WARN L286 SmtUtils]: Spent 12.22s on a formula simplification. DAG size of input: 127 DAG size of output: 81 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-15 15:22:39,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:22:44,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:23:17,089 WARN L286 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 131 DAG size of output: 81 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-15 15:23:21,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]