./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 de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:47:00,453 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:47:00,567 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:47:00,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:47:00,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:47:00,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:47:00,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:47:00,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:47:00,611 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:47:00,612 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:47:00,612 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:47:00,613 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:47:00,613 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:47:00,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:47:00,616 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:47:00,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:47:00,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:47:00,617 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:47:00,617 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:47:00,617 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:47:00,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:47:00,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:47:00,621 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:47:00,621 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:47:00,622 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:47:00,622 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:47:00,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:47:00,622 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:47:00,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:47:00,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:47:00,623 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:47:00,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:47:00,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:47:00,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:47:00,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:47:00,624 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:47:00,624 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:47:00,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:47:00,625 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:47:00,625 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:47:00,625 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:47:00,626 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:47:00,626 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:47:00,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:47:00,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:47:00,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:47:00,916 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:47:00,916 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:47:00,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-09-18 16:47:02,380 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:47:02,588 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:47:02,589 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-09-18 16:47:02,601 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b0dabfc78/f9e938e978884c24ae49f48c6b7a8f2e/FLAGd625a7817 [2024-09-18 16:47:02,619 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b0dabfc78/f9e938e978884c24ae49f48c6b7a8f2e [2024-09-18 16:47:02,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:47:02,624 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:47:02,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:47:02,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:47:02,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:47:02,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:02,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47fbb66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02, skipping insertion in model container [2024-09-18 16:47:02,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:02,661 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:47:02,823 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] [2024-09-18 16:47:02,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:47:02,870 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:47:02,880 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] [2024-09-18 16:47:02,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:47:02,936 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:47:02,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02 WrapperNode [2024-09-18 16:47:02,940 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:47:02,941 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:47:02,945 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:47:02,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:47:02,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:02,990 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,002 INFO L138 Inliner]: procedures = 17, calls = 173, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:47:03,002 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:47:03,003 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:47:03,003 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:47:03,003 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:47:03,016 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,018 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,052 INFO L175 MemorySlicer]: Split 139 memory accesses to 6 slices as follows [2, 29, 21, 30, 22, 35]. 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, 3, 1, 2, 2, 3]. [2024-09-18 16:47:03,053 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,053 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,063 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,066 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,068 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,069 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,072 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:47:03,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:47:03,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:47:03,074 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:47:03,075 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (1/1) ... [2024-09-18 16:47:03,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:47:03,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:47:03,106 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) [2024-09-18 16:47:03,111 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 [2024-09-18 16:47:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:47:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_33_0 [2024-09-18 16:47:03,149 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_33_0 [2024-09-18 16:47:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:47:03,149 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:47:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:47:03,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:47:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:47:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 16:47:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-18 16:47:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-18 16:47:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-18 16:47:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-18 16:47:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-18 16:47:03,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-18 16:47:03,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-18 16:47:03,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-18 16:47:03,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-18 16:47:03,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-18 16:47:03,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-18 16:47:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:47:03,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:47:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_53_0 [2024-09-18 16:47:03,153 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_53_0 [2024-09-18 16:47:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:47:03,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:47:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-18 16:47:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-18 16:47:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-18 16:47:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-18 16:47:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-18 16:47:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-18 16:47:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:47:03,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:47:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-18 16:47:03,262 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:47:03,264 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:47:03,635 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-18 16:47:03,635 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:47:03,660 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:47:03,660 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 16:47:03,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:47:03 BoogieIcfgContainer [2024-09-18 16:47:03,661 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:47:03,663 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:47:03,663 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:47:03,666 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:47:03,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:47:02" (1/3) ... [2024-09-18 16:47:03,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169a446b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:47:03, skipping insertion in model container [2024-09-18 16:47:03,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:47:02" (2/3) ... [2024-09-18 16:47:03,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169a446b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:47:03, skipping insertion in model container [2024-09-18 16:47:03,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:47:03" (3/3) ... [2024-09-18 16:47:03,669 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra-u.c [2024-09-18 16:47:03,687 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:47:03,687 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:47:03,747 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:47:03,756 INFO L336 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;@1f44a2a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:47:03,756 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:47:03,761 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) [2024-09-18 16:47:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-18 16:47:03,769 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:03,770 INFO L216 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] [2024-09-18 16:47:03,771 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:03,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:03,777 INFO L85 PathProgramCache]: Analyzing trace with hash -795461761, now seen corresponding path program 1 times [2024-09-18 16:47:03,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:03,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230157071] [2024-09-18 16:47:03,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:03,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:04,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:47:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:04,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:47:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:04,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:47:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:47:04,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:04,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230157071] [2024-09-18 16:47:04,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230157071] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:47:04,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:47:04,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 16:47:04,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263083993] [2024-09-18 16:47:04,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:47:04,099 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 16:47:04,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 16:47:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 16:47:04,129 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) [2024-09-18 16:47:04,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:04,343 INFO L93 Difference]: Finished difference Result 104 states and 150 transitions. [2024-09-18 16:47:04,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 16:47:04,348 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 [2024-09-18 16:47:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:04,357 INFO L225 Difference]: With dead ends: 104 [2024-09-18 16:47:04,357 INFO L226 Difference]: Without dead ends: 54 [2024-09-18 16:47:04,361 INFO L433 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 [2024-09-18 16:47:04,364 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-18 16:47:04,365 INFO L435 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] [2024-09-18 16:47:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-18 16:47:04,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-09-18 16:47:04,407 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) [2024-09-18 16:47:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-09-18 16:47:04,413 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 23 [2024-09-18 16:47:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:04,414 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-09-18 16:47:04,414 INFO L475 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) [2024-09-18 16:47:04,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-09-18 16:47:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-18 16:47:04,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:04,420 INFO L216 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] [2024-09-18 16:47:04,421 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:47:04,421 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:04,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1335693656, now seen corresponding path program 1 times [2024-09-18 16:47:04,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:04,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404761613] [2024-09-18 16:47:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:04,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:05,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:47:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:05,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:47:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:05,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:47:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:47:05,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:05,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404761613] [2024-09-18 16:47:05,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404761613] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:47:05,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:47:05,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-18 16:47:05,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029677396] [2024-09-18 16:47:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:47:05,885 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-18 16:47:05,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:05,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-18 16:47:05,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-09-18 16:47:05,886 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) [2024-09-18 16:47:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:06,850 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2024-09-18 16:47:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:47:06,851 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 [2024-09-18 16:47:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:06,853 INFO L225 Difference]: With dead ends: 83 [2024-09-18 16:47:06,853 INFO L226 Difference]: Without dead ends: 81 [2024-09-18 16:47:06,854 INFO L433 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 [2024-09-18 16:47:06,856 INFO L434 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 [2024-09-18 16:47:06,856 INFO L435 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] [2024-09-18 16:47:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-18 16:47:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2024-09-18 16:47:06,889 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) [2024-09-18 16:47:06,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2024-09-18 16:47:06,891 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 24 [2024-09-18 16:47:06,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:06,892 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2024-09-18 16:47:06,892 INFO L475 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) [2024-09-18 16:47:06,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2024-09-18 16:47:06,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 16:47:06,894 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:06,894 INFO L216 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] [2024-09-18 16:47:06,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 16:47:06,895 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:06,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1872287595, now seen corresponding path program 1 times [2024-09-18 16:47:06,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:06,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068078032] [2024-09-18 16:47:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:06,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:47:06,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145989318] [2024-09-18 16:47:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:06,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:06,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:47:06,931 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) [2024-09-18 16:47:06,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:47:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:07,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-18 16:47:07,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:47:07,300 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 [2024-09-18 16:47:07,324 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 [2024-09-18 16:47:07,328 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 [2024-09-18 16:47:07,342 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 [2024-09-18 16:47:07,686 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 19 treesize of output 11 [2024-09-18 16:47:07,690 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 [2024-09-18 16:47:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:47:07,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:47:07,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:07,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068078032] [2024-09-18 16:47:07,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:47:07,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145989318] [2024-09-18 16:47:07,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145989318] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:47:07,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:47:07,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-18 16:47:07,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286229377] [2024-09-18 16:47:07,955 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:47:07,955 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 16:47:07,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:07,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 16:47:07,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-18 16:47:07,956 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) [2024-09-18 16:47:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:08,700 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2024-09-18 16:47:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 16:47:08,703 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 [2024-09-18 16:47:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:08,705 INFO L225 Difference]: With dead ends: 99 [2024-09-18 16:47:08,705 INFO L226 Difference]: Without dead ends: 97 [2024-09-18 16:47:08,706 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-09-18 16:47:08,708 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2024-09-18 16:47:08,709 INFO L435 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] [2024-09-18 16:47:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-18 16:47:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2024-09-18 16:47:08,743 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) [2024-09-18 16:47:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2024-09-18 16:47:08,748 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 30 [2024-09-18 16:47:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:08,748 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2024-09-18 16:47:08,749 INFO L475 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) [2024-09-18 16:47:08,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2024-09-18 16:47:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 16:47:08,750 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:08,750 INFO L216 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] [2024-09-18 16:47:08,762 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 16:47:08,950 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:08,951 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:08,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash 687714431, now seen corresponding path program 1 times [2024-09-18 16:47:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:08,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292894492] [2024-09-18 16:47:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:08,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:09,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:47:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:09,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:47:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:09,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:47:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:10,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:47:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 16:47:10,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:10,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292894492] [2024-09-18 16:47:10,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292894492] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:47:10,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680128053] [2024-09-18 16:47:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:10,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:10,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:47:10,483 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) [2024-09-18 16:47:10,485 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:47:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:10,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-18 16:47:10,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:47:10,605 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 [2024-09-18 16:47:10,614 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 [2024-09-18 16:47:10,621 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 [2024-09-18 16:47:22,886 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 8 treesize of output 1 [2024-09-18 16:47:23,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:47:23,335 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 [2024-09-18 16:47:27,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-18 16:47:27,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-18 16:47:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:47:27,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:47:28,314 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 37 treesize of output 33 [2024-09-18 16:47:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680128053] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:47:29,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:47:29,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2024-09-18 16:47:29,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246739230] [2024-09-18 16:47:29,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:47:29,152 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-18 16:47:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-18 16:47:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1215, Unknown=4, NotChecked=0, Total=1332 [2024-09-18 16:47:29,154 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 30 states, 23 states have (on average 1.391304347826087) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (12), 8 states have call predecessors, (12), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-18 16:47:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:32,319 INFO L93 Difference]: Finished difference Result 181 states and 234 transitions. [2024-09-18 16:47:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-18 16:47:32,321 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 1.391304347826087) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (12), 8 states have call predecessors, (12), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 30 [2024-09-18 16:47:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:32,324 INFO L225 Difference]: With dead ends: 181 [2024-09-18 16:47:32,326 INFO L226 Difference]: Without dead ends: 179 [2024-09-18 16:47:32,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=342, Invalid=3194, Unknown=4, NotChecked=0, Total=3540 [2024-09-18 16:47:32,329 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 218 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:47:32,330 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 211 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-18 16:47:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-18 16:47:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 147. [2024-09-18 16:47:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 91 states have internal predecessors, (98), 42 states have call successors, (42), 15 states have call predecessors, (42), 17 states have return successors, (47), 40 states have call predecessors, (47), 38 states have call successors, (47) [2024-09-18 16:47:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 187 transitions. [2024-09-18 16:47:32,403 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 187 transitions. Word has length 30 [2024-09-18 16:47:32,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:32,403 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 187 transitions. [2024-09-18 16:47:32,404 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 1.391304347826087) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (12), 8 states have call predecessors, (12), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-18 16:47:32,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:32,404 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 187 transitions. [2024-09-18 16:47:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 16:47:32,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:32,405 INFO L216 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] [2024-09-18 16:47:32,423 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 16:47:32,609 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:32,610 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:32,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:32,610 INFO L85 PathProgramCache]: Analyzing trace with hash -546904304, now seen corresponding path program 1 times [2024-09-18 16:47:32,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:32,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459913744] [2024-09-18 16:47:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:32,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:47:32,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233822905] [2024-09-18 16:47:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:32,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:32,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:47:32,650 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) [2024-09-18 16:47:32,652 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:47:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:32,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-09-18 16:47:32,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:47:32,795 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 [2024-09-18 16:47:32,800 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 [2024-09-18 16:47:32,805 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 [2024-09-18 16:47:32,811 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 [2024-09-18 16:47:32,817 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 11 treesize of output 7 [2024-09-18 16:47:33,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:47:33,668 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 46 treesize of output 38 [2024-09-18 16:47:33,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:47:33,696 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 58 treesize of output 42 [2024-09-18 16:47:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:47:33,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:47:40,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:40,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459913744] [2024-09-18 16:47:40,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:47:40,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233822905] [2024-09-18 16:47:40,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233822905] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:47:40,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:47:40,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-18 16:47:40,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712414595] [2024-09-18 16:47:40,279 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:47:40,279 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 16:47:40,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:40,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 16:47:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-09-18 16:47:40,281 INFO L87 Difference]: Start difference. First operand 147 states and 187 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 16:47:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:42,399 INFO L93 Difference]: Finished difference Result 155 states and 193 transitions. [2024-09-18 16:47:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 16:47:42,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2024-09-18 16:47:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:42,401 INFO L225 Difference]: With dead ends: 155 [2024-09-18 16:47:42,401 INFO L226 Difference]: Without dead ends: 153 [2024-09-18 16:47:42,402 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 16:47:42,403 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:47:42,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 221 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 16:47:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-18 16:47:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2024-09-18 16:47:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 94 states have internal predecessors, (101), 42 states have call successors, (42), 16 states have call predecessors, (42), 18 states have return successors, (47), 40 states have call predecessors, (47), 38 states have call successors, (47) [2024-09-18 16:47:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 190 transitions. [2024-09-18 16:47:42,461 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 190 transitions. Word has length 36 [2024-09-18 16:47:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:42,461 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 190 transitions. [2024-09-18 16:47:42,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 16:47:42,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 190 transitions. [2024-09-18 16:47:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 16:47:42,463 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:42,463 INFO L216 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] [2024-09-18 16:47:42,478 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-18 16:47:42,663 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:42,664 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:42,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash -274231684, now seen corresponding path program 1 times [2024-09-18 16:47:42,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:42,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965500842] [2024-09-18 16:47:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:42,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:47:42,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195491047] [2024-09-18 16:47:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:42,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:42,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:47:42,693 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) [2024-09-18 16:47:42,697 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:47:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:42,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-18 16:47:42,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:47:42,860 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 [2024-09-18 16:47:42,862 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 11 treesize of output 7 [2024-09-18 16:47:42,870 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 [2024-09-18 16:47:43,038 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 [2024-09-18 16:47:43,041 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 [2024-09-18 16:47:43,045 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 [2024-09-18 16:47:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-18 16:47:43,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:47:43,148 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 35 treesize of output 27 [2024-09-18 16:47:43,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:43,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965500842] [2024-09-18 16:47:43,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:47:43,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195491047] [2024-09-18 16:47:43,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195491047] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:47:43,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:47:43,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-18 16:47:43,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883219371] [2024-09-18 16:47:43,227 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:47:43,227 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 16:47:43,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:43,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 16:47:43,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:47:43,228 INFO L87 Difference]: Start difference. First operand 151 states and 190 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 16:47:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:43,712 INFO L93 Difference]: Finished difference Result 166 states and 207 transitions. [2024-09-18 16:47:43,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 16:47:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2024-09-18 16:47:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:43,715 INFO L225 Difference]: With dead ends: 166 [2024-09-18 16:47:43,715 INFO L226 Difference]: Without dead ends: 164 [2024-09-18 16:47:43,715 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-18 16:47:43,716 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 44 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:47:43,716 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 256 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 16:47:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-09-18 16:47:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2024-09-18 16:47:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 93 states have (on average 1.118279569892473) internal successors, (104), 97 states have internal predecessors, (104), 42 states have call successors, (42), 17 states have call predecessors, (42), 19 states have return successors, (47), 40 states have call predecessors, (47), 38 states have call successors, (47) [2024-09-18 16:47:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 193 transitions. [2024-09-18 16:47:43,774 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 193 transitions. Word has length 36 [2024-09-18 16:47:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:43,775 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 193 transitions. [2024-09-18 16:47:43,775 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 16:47:43,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 193 transitions. [2024-09-18 16:47:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 16:47:43,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:43,777 INFO L216 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] [2024-09-18 16:47:43,791 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 16:47:43,977 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:43,978 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:43,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:43,978 INFO L85 PathProgramCache]: Analyzing trace with hash 21325385, now seen corresponding path program 1 times [2024-09-18 16:47:43,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:43,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755431197] [2024-09-18 16:47:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:43,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:47:44,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511756837] [2024-09-18 16:47:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:44,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:44,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:47:44,016 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) [2024-09-18 16:47:44,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:47:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:44,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-09-18 16:47:44,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:47:44,246 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 [2024-09-18 16:47:44,251 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 [2024-09-18 16:47:44,255 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 [2024-09-18 16:47:44,260 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 [2024-09-18 16:47:44,265 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 [2024-09-18 16:47:45,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:47:45,125 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 [2024-09-18 16:47:45,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:47:45,153 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 59 treesize of output 43 [2024-09-18 16:47:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:47:45,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:47:53,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:53,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755431197] [2024-09-18 16:47:53,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:47:53,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511756837] [2024-09-18 16:47:53,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511756837] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:47:53,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:47:53,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-18 16:47:53,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675352655] [2024-09-18 16:47:53,789 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:47:53,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 16:47:53,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 16:47:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=258, Unknown=1, NotChecked=0, Total=306 [2024-09-18 16:47:53,791 INFO L87 Difference]: Start difference. First operand 155 states and 193 transitions. Second operand has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 16:48:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:04,302 INFO L93 Difference]: Finished difference Result 169 states and 204 transitions. [2024-09-18 16:48:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:48:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-09-18 16:48:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:04,305 INFO L225 Difference]: With dead ends: 169 [2024-09-18 16:48:04,305 INFO L226 Difference]: Without dead ends: 165 [2024-09-18 16:48:04,306 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=211, Invalid=1046, Unknown=3, NotChecked=0, Total=1260 [2024-09-18 16:48:04,307 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:04,308 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 257 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-18 16:48:04,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-18 16:48:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2024-09-18 16:48:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 101 states have internal predecessors, (109), 42 states have call successors, (42), 19 states have call predecessors, (42), 20 states have return successors, (47), 40 states have call predecessors, (47), 38 states have call successors, (47) [2024-09-18 16:48:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 198 transitions. [2024-09-18 16:48:04,369 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 198 transitions. Word has length 42 [2024-09-18 16:48:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:04,369 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 198 transitions. [2024-09-18 16:48:04,369 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 16:48:04,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 198 transitions. [2024-09-18 16:48:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 16:48:04,371 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:04,371 INFO L216 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] [2024-09-18 16:48:04,386 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-18 16:48:04,571 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-18 16:48:04,572 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:04,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:04,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1606878135, now seen corresponding path program 1 times [2024-09-18 16:48:04,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:04,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722985058] [2024-09-18 16:48:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:04,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:04,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868126408] [2024-09-18 16:48:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:04,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:04,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:04,623 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) [2024-09-18 16:48:04,624 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 16:48:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:04,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-18 16:48:04,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:04,780 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 [2024-09-18 16:48:04,784 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 [2024-09-18 16:48:04,790 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 [2024-09-18 16:48:04,795 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 [2024-09-18 16:48:04,801 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 [2024-09-18 16:48:04,984 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 [2024-09-18 16:48:05,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:48:05,354 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 [2024-09-18 16:48:17,564 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 [2024-09-18 16:48:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 16:48:17,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:33,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:33,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722985058] [2024-09-18 16:48:33,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:33,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868126408] [2024-09-18 16:48:33,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868126408] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:33,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:48:33,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-18 16:48:33,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455535325] [2024-09-18 16:48:33,441 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:48:33,441 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 16:48:33,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 16:48:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=223, Unknown=5, NotChecked=0, Total=272 [2024-09-18 16:48:33,442 INFO L87 Difference]: Start difference. First operand 161 states and 198 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) [2024-09-18 16:48:35,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:35,382 INFO L93 Difference]: Finished difference Result 213 states and 257 transitions. [2024-09-18 16:48:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:48:35,383 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 [2024-09-18 16:48:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:35,388 INFO L225 Difference]: With dead ends: 213 [2024-09-18 16:48:35,388 INFO L226 Difference]: Without dead ends: 211 [2024-09-18 16:48:35,389 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=97, Invalid=404, Unknown=5, NotChecked=0, Total=506 [2024-09-18 16:48:35,390 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 44 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 32 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:35,390 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 800 Invalid, 4 Unknown, 0 Unchecked, 1.4s Time] [2024-09-18 16:48:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-18 16:48:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2024-09-18 16:48:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 127 states have (on average 1.110236220472441) internal successors, (141), 130 states have internal predecessors, (141), 52 states have call successors, (52), 25 states have call predecessors, (52), 27 states have return successors, (60), 51 states have call predecessors, (60), 47 states have call successors, (60) [2024-09-18 16:48:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 253 transitions. [2024-09-18 16:48:35,486 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 253 transitions. Word has length 42 [2024-09-18 16:48:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:35,486 INFO L474 AbstractCegarLoop]: Abstraction has 207 states and 253 transitions. [2024-09-18 16:48:35,486 INFO L475 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) [2024-09-18 16:48:35,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 253 transitions. [2024-09-18 16:48:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-18 16:48:35,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:35,488 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-09-18 16:48:35,502 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 16:48:35,689 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:35,689 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:35,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:35,690 INFO L85 PathProgramCache]: Analyzing trace with hash 964440670, now seen corresponding path program 2 times [2024-09-18 16:48:35,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:35,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197306903] [2024-09-18 16:48:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:35,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012136598] [2024-09-18 16:48:35,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:48:35,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:35,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:35,733 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) [2024-09-18 16:48:35,734 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 16:48:35,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:48:35,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:48:35,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-09-18 16:48:35,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:35,896 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 [2024-09-18 16:48:35,904 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 42 treesize of output 40 [2024-09-18 16:48:35,948 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 11 treesize of output 7 [2024-09-18 16:48:35,954 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 [2024-09-18 16:48:35,962 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 [2024-09-18 16:48:35,995 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 [2024-09-18 16:48:36,307 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 [2024-09-18 16:48:36,918 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 [2024-09-18 16:48:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-18 16:48:37,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:49,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:49,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197306903] [2024-09-18 16:48:49,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:49,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012136598] [2024-09-18 16:48:49,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012136598] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:49,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:48:49,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-18 16:48:49,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403717330] [2024-09-18 16:48:49,769 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:48:49,769 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 16:48:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:49,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 16:48:49,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=331, Unknown=1, NotChecked=0, Total=380 [2024-09-18 16:48:49,770 INFO L87 Difference]: Start difference. First operand 207 states and 253 transitions. Second operand has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-18 16:48:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:51,666 INFO L93 Difference]: Finished difference Result 255 states and 308 transitions. [2024-09-18 16:48:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 16:48:51,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 48 [2024-09-18 16:48:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:51,669 INFO L225 Difference]: With dead ends: 255 [2024-09-18 16:48:51,669 INFO L226 Difference]: Without dead ends: 253 [2024-09-18 16:48:51,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=96, Invalid=553, Unknown=1, NotChecked=0, Total=650 [2024-09-18 16:48:51,671 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 55 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:51,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 328 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 824 Invalid, 2 Unknown, 0 Unchecked, 1.3s Time] [2024-09-18 16:48:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-09-18 16:48:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 209. [2024-09-18 16:48:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 128 states have (on average 1.109375) internal successors, (142), 131 states have internal predecessors, (142), 52 states have call successors, (52), 25 states have call predecessors, (52), 28 states have return successors, (62), 52 states have call predecessors, (62), 47 states have call successors, (62) [2024-09-18 16:48:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 256 transitions. [2024-09-18 16:48:51,754 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 256 transitions. Word has length 48 [2024-09-18 16:48:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:51,755 INFO L474 AbstractCegarLoop]: Abstraction has 209 states and 256 transitions. [2024-09-18 16:48:51,755 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-18 16:48:51,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 256 transitions. [2024-09-18 16:48:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 16:48:51,756 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:51,756 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2024-09-18 16:48:51,771 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-18 16:48:51,957 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:51,957 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:51,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:51,958 INFO L85 PathProgramCache]: Analyzing trace with hash 71508741, now seen corresponding path program 3 times [2024-09-18 16:48:51,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:51,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142365393] [2024-09-18 16:48:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:51,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:52,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470417349] [2024-09-18 16:48:52,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:48:52,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:52,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:52,006 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) [2024-09-18 16:48:52,007 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 16:48:52,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-18 16:48:52,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:48:52,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-18 16:48:52,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:52,217 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 [2024-09-18 16:48:52,303 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 [2024-09-18 16:48:52,316 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 [2024-09-18 16:48:52,327 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 [2024-09-18 16:48:53,224 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 50 treesize of output 22 [2024-09-18 16:48:53,272 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 28 treesize of output 16 [2024-09-18 16:48:53,282 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 22 treesize of output 10 [2024-09-18 16:48:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-18 16:48:53,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:53,535 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 107 treesize of output 79 [2024-09-18 16:49:05,849 WARN L293 SmtUtils]: Spent 8.16s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 16:49:05,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:49:05,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142365393] [2024-09-18 16:49:05,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:49:05,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470417349] [2024-09-18 16:49:05,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470417349] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:49:05,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:49:05,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-18 16:49:05,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750802330] [2024-09-18 16:49:05,877 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:49:05,877 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 16:49:05,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:49:05,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 16:49:05,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2024-09-18 16:49:05,878 INFO L87 Difference]: Start difference. First operand 209 states and 256 transitions. Second operand has 13 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-18 16:49:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:49:06,919 INFO L93 Difference]: Finished difference Result 231 states and 277 transitions. [2024-09-18 16:49:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:49:06,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2024-09-18 16:49:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:49:06,921 INFO L225 Difference]: With dead ends: 231 [2024-09-18 16:49:06,921 INFO L226 Difference]: Without dead ends: 229 [2024-09-18 16:49:06,922 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2024-09-18 16:49:06,922 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 16:49:06,923 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 352 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 16:49:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-09-18 16:49:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 183. [2024-09-18 16:49:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 116 states have internal predecessors, (126), 45 states have call successors, (45), 23 states have call predecessors, (45), 24 states have return successors, (49), 43 states have call predecessors, (49), 40 states have call successors, (49) [2024-09-18 16:49:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2024-09-18 16:49:07,023 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 54 [2024-09-18 16:49:07,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:49:07,024 INFO L474 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2024-09-18 16:49:07,024 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-18 16:49:07,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2024-09-18 16:49:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-18 16:49:07,026 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:49:07,026 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2024-09-18 16:49:07,044 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 16:49:07,226 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:49:07,226 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:49:07,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:07,227 INFO L85 PathProgramCache]: Analyzing trace with hash -959275072, now seen corresponding path program 1 times [2024-09-18 16:49:07,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:49:07,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195632569] [2024-09-18 16:49:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:07,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:49:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:49:07,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913955775] [2024-09-18 16:49:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:07,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:49:07,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:49:07,259 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) [2024-09-18 16:49:07,260 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 16:49:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:07,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-18 16:49:07,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:49:07,458 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 [2024-09-18 16:49:07,464 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 [2024-09-18 16:49:07,472 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 [2024-09-18 16:49:07,887 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 [2024-09-18 16:49:07,892 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 22 treesize of output 10 [2024-09-18 16:49:07,902 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 [2024-09-18 16:49:07,910 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 29 treesize of output 13 [2024-09-18 16:49:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:49:07,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:49:08,125 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 90 treesize of output 74 [2024-09-18 16:49:16,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:49:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195632569] [2024-09-18 16:49:16,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:49:16,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913955775] [2024-09-18 16:49:16,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913955775] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:49:16,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:49:16,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-18 16:49:16,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942504063] [2024-09-18 16:49:16,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:49:16,250 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 16:49:16,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:49:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 16:49:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2024-09-18 16:49:16,252 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-18 16:49:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:49:16,724 INFO L93 Difference]: Finished difference Result 201 states and 238 transitions. [2024-09-18 16:49:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 16:49:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-09-18 16:49:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:49:16,726 INFO L225 Difference]: With dead ends: 201 [2024-09-18 16:49:16,726 INFO L226 Difference]: Without dead ends: 199 [2024-09-18 16:49:16,727 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=49, Invalid=160, Unknown=1, NotChecked=0, Total=210 [2024-09-18 16:49:16,727 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 48 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:49:16,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 222 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 16:49:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-18 16:49:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2024-09-18 16:49:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 125 states have internal predecessors, (135), 45 states have call successors, (45), 26 states have call predecessors, (45), 27 states have return successors, (49), 43 states have call predecessors, (49), 40 states have call successors, (49) [2024-09-18 16:49:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 229 transitions. [2024-09-18 16:49:16,816 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 229 transitions. Word has length 48 [2024-09-18 16:49:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:49:16,816 INFO L474 AbstractCegarLoop]: Abstraction has 195 states and 229 transitions. [2024-09-18 16:49:16,817 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-18 16:49:16,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 229 transitions. [2024-09-18 16:49:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-18 16:49:16,818 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:49:16,818 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:49:16,831 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-18 16:49:17,018 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-18 16:49:17,019 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:49:17,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:17,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1783703984, now seen corresponding path program 1 times [2024-09-18 16:49:17,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:49:17,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735979659] [2024-09-18 16:49:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:17,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:49:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:49:17,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140326278] [2024-09-18 16:49:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:17,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:49:17,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:49:17,066 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) [2024-09-18 16:49:17,068 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 16:49:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:17,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-18 16:49:17,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:49:17,256 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 [2024-09-18 16:49:17,261 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 [2024-09-18 16:49:17,268 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 [2024-09-18 16:49:17,277 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 [2024-09-18 16:49:17,694 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 50 treesize of output 22 [2024-09-18 16:49:17,727 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 40 treesize of output 20 [2024-09-18 16:49:17,734 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 57 treesize of output 25 [2024-09-18 16:49:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-18 16:49:17,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:49:22,010 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 128 treesize of output 100 [2024-09-18 16:49:22,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:49:22,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735979659] [2024-09-18 16:49:22,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:49:22,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140326278] [2024-09-18 16:49:22,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140326278] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:49:22,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:49:22,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-18 16:49:22,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634853446] [2024-09-18 16:49:22,123 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:49:22,123 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 16:49:22,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:49:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 16:49:22,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2024-09-18 16:49:22,124 INFO L87 Difference]: Start difference. First operand 195 states and 229 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-18 16:49:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:49:22,797 INFO L93 Difference]: Finished difference Result 203 states and 235 transitions. [2024-09-18 16:49:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 16:49:22,797 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2024-09-18 16:49:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:49:22,799 INFO L225 Difference]: With dead ends: 203 [2024-09-18 16:49:22,799 INFO L226 Difference]: Without dead ends: 201 [2024-09-18 16:49:22,799 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=49, Invalid=160, Unknown=1, NotChecked=0, Total=210 [2024-09-18 16:49:22,800 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:49:22,800 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 269 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 16:49:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-18 16:49:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2024-09-18 16:49:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 125 states have (on average 1.104) internal successors, (138), 128 states have internal predecessors, (138), 45 states have call successors, (45), 27 states have call predecessors, (45), 28 states have return successors, (49), 43 states have call predecessors, (49), 40 states have call successors, (49) [2024-09-18 16:49:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 232 transitions. [2024-09-18 16:49:22,899 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 232 transitions. Word has length 48 [2024-09-18 16:49:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:49:22,899 INFO L474 AbstractCegarLoop]: Abstraction has 199 states and 232 transitions. [2024-09-18 16:49:22,900 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-18 16:49:22,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 232 transitions. [2024-09-18 16:49:22,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 16:49:22,901 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:49:22,901 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2024-09-18 16:49:22,914 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 16:49:23,101 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 16:49:23,101 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:49:23,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:23,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1281191157, now seen corresponding path program 1 times [2024-09-18 16:49:23,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:49:23,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548289402] [2024-09-18 16:49:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:23,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:49:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:49:23,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127832391] [2024-09-18 16:49:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:23,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:49:23,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:49:23,152 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:49:23,154 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 16:49:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:23,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-18 16:49:23,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:49:23,356 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 [2024-09-18 16:49:23,361 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 [2024-09-18 16:49:27,391 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_main_~#n~0.offset_BEFORE_CALL_23| Int) (|v_main_~#r~0.base_BEFORE_CALL_20| Int) (|v_main_~#n~0.base_BEFORE_CALL_21| Int) (|v_main_~#r~0.offset_BEFORE_CALL_22| Int)) (= (select (select |c_#memory_int#2| |v_main_~#n~0.base_BEFORE_CALL_21|) |v_main_~#n~0.offset_BEFORE_CALL_23|) (select (select |c_#memory_int#4| |v_main_~#r~0.base_BEFORE_CALL_20|) |v_main_~#r~0.offset_BEFORE_CALL_22|))) is different from true [2024-09-18 16:49:31,468 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_20 Int) (v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_18 Int) (v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_18 Int) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_18 Int)) (= (select (select |c_#memory_int#2| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_18) v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_20) (select (select |c_#memory_int#4| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_18) v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_18))) is different from true [2024-09-18 16:49:35,602 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_21 Int) (v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_19 Int) (v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_19 Int) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_19 Int)) (= (select (select |c_#memory_int#2| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_19) v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_21) (select (select |c_#memory_int#4| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_19) v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_19))) is different from true [2024-09-18 16:50:05,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:50:05,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 131 [2024-09-18 16:50:05,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:50:05,337 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 89 treesize of output 77 [2024-09-18 16:50:05,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:50:05,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 125 [2024-09-18 16:50:25,601 WARN L293 SmtUtils]: Spent 20.19s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-09-18 16:50:25,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:50:25,601 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 61 treesize of output 49 [2024-09-18 16:50:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 22 not checked. [2024-09-18 16:50:34,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:50:47,782 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 80 treesize of output 64 [2024-09-18 16:50:47,785 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 64 treesize of output 48 [2024-09-18 16:50:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 16:50:47,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:50:47,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548289402] [2024-09-18 16:50:47,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:50:47,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127832391] [2024-09-18 16:50:47,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127832391] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:50:47,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:50:47,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 22 [2024-09-18 16:50:47,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078140454] [2024-09-18 16:50:47,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:50:47,806 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-18 16:50:47,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:50:47,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-18 16:50:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=287, Unknown=8, NotChecked=108, Total=462 [2024-09-18 16:50:47,806 INFO L87 Difference]: Start difference. First operand 199 states and 232 transitions. Second operand has 22 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 10 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-18 16:50:51,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:56,196 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_main_~#n~0.offset_BEFORE_CALL_23| Int) (|v_main_~#r~0.base_BEFORE_CALL_20| Int) (|v_main_~#n~0.base_BEFORE_CALL_21| Int) (|v_main_~#r~0.offset_BEFORE_CALL_22| Int)) (= (select (select |c_#memory_int#2| |v_main_~#n~0.base_BEFORE_CALL_21|) |v_main_~#n~0.offset_BEFORE_CALL_23|) (select (select |c_#memory_int#4| |v_main_~#r~0.base_BEFORE_CALL_20|) |v_main_~#r~0.offset_BEFORE_CALL_22|))) (exists ((v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_21 Int) (v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_19 Int) (v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_19 Int) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_19 Int)) (= (select (select |c_#memory_int#2| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_19) v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_21) (select (select |c_#memory_int#4| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_19) v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_19))) (exists ((v_func_to_recursive_line_37_to_53_0_~p.offset_BEFORE_CALL_19 Int) (v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_12 Int) (v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_22 Int) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_20 Int) (v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_20 Int) (v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_19 Int) (v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_20 Int) (v_func_to_recursive_line_37_to_53_0_~q.offset_BEFORE_CALL_12 Int)) (let ((.cse1 (select (select |c_#memory_int#4| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_20) v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_20)) (.cse0 (select (select |c_#memory_int#2| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_20) v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_22))) (and (= .cse0 .cse1) (let ((.cse2 (select (select |c_#memory_int#5| v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_12) v_func_to_recursive_line_37_to_53_0_~q.offset_BEFORE_CALL_12))) (= (mod (+ (* .cse2 .cse1) (let ((.cse3 (select (select |c_#memory_int#1| v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_19) v_func_to_recursive_line_37_to_53_0_~p.offset_BEFORE_CALL_19))) (* .cse3 .cse3))) 4294967296) (mod (* .cse0 .cse2) 4294967296))))))) is different from true [2024-09-18 16:51:12,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-18 16:51:28,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1]