./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.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 ca4ee3dd 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_prod4br-ll.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 96f1211cbeeae798f0ae4041c6e80d5023e7b1c38257b583d7afbb4e6848597b --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-ca4ee3d-m [2024-09-20 20:01:44,464 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 20:01:44,537 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 20:01:44,541 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 20:01:44,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 20:01:44,569 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 20:01:44,570 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 20:01:44,570 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 20:01:44,571 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 20:01:44,571 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 20:01:44,572 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 20:01:44,572 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 20:01:44,573 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 20:01:44,574 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 20:01:44,575 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 20:01:44,576 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 20:01:44,576 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 20:01:44,576 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 20:01:44,577 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 20:01:44,577 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 20:01:44,577 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 20:01:44,578 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 20:01:44,578 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 20:01:44,579 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 20:01:44,579 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 20:01:44,579 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 20:01:44,580 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 20:01:44,580 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 20:01:44,580 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 20:01:44,581 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 20:01:44,581 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 20:01:44,581 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 20:01:44,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 20:01:44,582 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 20:01:44,582 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 20:01:44,582 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 20:01:44,582 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 20:01:44,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 20:01:44,583 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 20:01:44,583 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 20:01:44,583 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 20:01:44,585 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 20:01:44,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96f1211cbeeae798f0ae4041c6e80d5023e7b1c38257b583d7afbb4e6848597b Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 20:01:44,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 20:01:44,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 20:01:44,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 20:01:44,859 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 20:01:44,859 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 20:01:44,860 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2024-09-20 20:01:46,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 20:01:46,418 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 20:01:46,419 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2024-09-20 20:01:46,430 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f00d1bbcf/2688edc7ec5143f8bf7a39ddcbafeeab/FLAGcedae026f [2024-09-20 20:01:46,789 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f00d1bbcf/2688edc7ec5143f8bf7a39ddcbafeeab [2024-09-20 20:01:46,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 20:01:46,793 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 20:01:46,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 20:01:46,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 20:01:46,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 20:01:46,800 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:01:46" (1/1) ... [2024-09-20 20:01:46,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36118b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:46, skipping insertion in model container [2024-09-20 20:01:46,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:01:46" (1/1) ... [2024-09-20 20:01:46,825 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 20:01:46,976 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_prod4br-ll.c[1060,1073] [2024-09-20 20:01:46,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 20:01:47,008 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 20:01:47,019 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_prod4br-ll.c[1060,1073] [2024-09-20 20:01:47,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 20:01:47,046 INFO L204 MainTranslator]: Completed translation [2024-09-20 20:01:47,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47 WrapperNode [2024-09-20 20:01:47,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 20:01:47,047 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 20:01:47,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 20:01:47,048 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 20:01:47,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,064 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,073 INFO L138 Inliner]: procedures = 16, calls = 86, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 20:01:47,074 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 20:01:47,074 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 20:01:47,075 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 20:01:47,075 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 20:01:47,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,087 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,129 INFO L175 MemorySlicer]: Split 57 memory accesses to 7 slices as follows [2, 15, 7, 9, 15, 4, 5]. 26 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 16 writes are split as follows [0, 4, 2, 4, 4, 1, 1]. [2024-09-20 20:01:47,129 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,138 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,141 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,143 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 20:01:47,146 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 20:01:47,146 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 20:01:47,146 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 20:01:47,147 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (1/1) ... [2024-09-20 20:01:47,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 20:01:47,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:47,210 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) [2024-09-20 20:01:47,211 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 [2024-09-20 20:01:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 20:01:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 20:01:47,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 20:01:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 20:01:47,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 20:01:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 20:01:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 20:01:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 20:01:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 20:01:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 20:01:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 20:01:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 20:01:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 20:01:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 20:01:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 20:01:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 20:01:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 20:01:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 20:01:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 20:01:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 20:01:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 20:01:47,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 20:01:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 20:01:47,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 20:01:47,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 20:01:47,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 20:01:47,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 20:01:47,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 20:01:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 20:01:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 20:01:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 20:01:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_51_0 [2024-09-20 20:01:47,251 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_51_0 [2024-09-20 20:01:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 20:01:47,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 20:01:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 20:01:47,346 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 20:01:47,348 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 20:01:47,619 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-09-20 20:01:47,623 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 20:01:47,646 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 20:01:47,648 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 20:01:47,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:01:47 BoogieIcfgContainer [2024-09-20 20:01:47,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 20:01:47,651 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 20:01:47,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 20:01:47,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 20:01:47,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 08:01:46" (1/3) ... [2024-09-20 20:01:47,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b6545e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:01:47, skipping insertion in model container [2024-09-20 20:01:47,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:47" (2/3) ... [2024-09-20 20:01:47,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b6545e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:01:47, skipping insertion in model container [2024-09-20 20:01:47,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:01:47" (3/3) ... [2024-09-20 20:01:47,659 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_prod4br-ll.c [2024-09-20 20:01:47,674 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 20:01:47,674 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 20:01:47,728 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 20:01:47,733 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;@2ddc50f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 20:01:47,734 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 20:01:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 20:01:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 20:01:47,743 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:47,744 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:01:47,744 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:47,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1334266921, now seen corresponding path program 1 times [2024-09-20 20:01:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:47,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981867163] [2024-09-20 20:01:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:47,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:47,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:01:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:47,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:01:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 20:01:47,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:47,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981867163] [2024-09-20 20:01:47,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981867163] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:01:47,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:01:47,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 20:01:47,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496344402] [2024-09-20 20:01:47,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:01:47,959 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 20:01:47,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:47,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 20:01:47,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 20:01:47,983 INFO L87 Difference]: Start difference. First operand has 41 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 20:01:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:48,016 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2024-09-20 20:01:48,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 20:01:48,018 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-20 20:01:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:48,025 INFO L225 Difference]: With dead ends: 74 [2024-09-20 20:01:48,025 INFO L226 Difference]: Without dead ends: 37 [2024-09-20 20:01:48,030 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 20:01:48,033 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:48,034 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 20:01:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-20 20:01:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-20 20:01:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.375) internal successors, (33), 26 states have internal predecessors, (33), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 20:01:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2024-09-20 20:01:48,065 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 18 [2024-09-20 20:01:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:48,066 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2024-09-20 20:01:48,066 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 20:01:48,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2024-09-20 20:01:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 20:01:48,067 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:48,067 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:01:48,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 20:01:48,070 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:48,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:48,071 INFO L85 PathProgramCache]: Analyzing trace with hash -633202343, now seen corresponding path program 1 times [2024-09-20 20:01:48,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:48,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147581749] [2024-09-20 20:01:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:48,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:48,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675653891] [2024-09-20 20:01:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:48,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:48,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:48,165 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) [2024-09-20 20:01:48,167 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 20:01:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:48,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-20 20:01:48,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:48,385 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 [2024-09-20 20:01:48,389 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 [2024-09-20 20:01:48,403 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 [2024-09-20 20:01:48,413 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 [2024-09-20 20:01:48,422 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 [2024-09-20 20:01:48,435 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 [2024-09-20 20:01:48,652 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 [2024-09-20 20:01:48,659 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 [2024-09-20 20:01:48,673 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 [2024-09-20 20:01:48,681 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 [2024-09-20 20:01:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 20:01:48,738 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 20:01:48,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:48,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147581749] [2024-09-20 20:01:48,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:48,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675653891] [2024-09-20 20:01:48,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675653891] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:01:48,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:01:48,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 20:01:48,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289186943] [2024-09-20 20:01:48,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:01:48,743 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:01:48,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:48,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:01:48,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 20:01:48,745 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 20:01:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:49,053 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-09-20 20:01:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 20:01:49,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-20 20:01:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:49,055 INFO L225 Difference]: With dead ends: 58 [2024-09-20 20:01:49,056 INFO L226 Difference]: Without dead ends: 56 [2024-09-20 20:01:49,056 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:01:49,057 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:49,058 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 173 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:01:49,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-20 20:01:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2024-09-20 20:01:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 35 states have internal predecessors, (44), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 20:01:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2024-09-20 20:01:49,080 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 18 [2024-09-20 20:01:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:49,080 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2024-09-20 20:01:49,081 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 20:01:49,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:49,081 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2024-09-20 20:01:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 20:01:49,084 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:49,084 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] [2024-09-20 20:01:49,102 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 20:01:49,288 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:49,289 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:49,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:49,289 INFO L85 PathProgramCache]: Analyzing trace with hash 261423925, now seen corresponding path program 1 times [2024-09-20 20:01:49,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:49,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992308642] [2024-09-20 20:01:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:49,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:49,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501400004] [2024-09-20 20:01:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:49,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:49,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:49,370 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) [2024-09-20 20:01:49,372 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 20:01:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:49,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 20:01:49,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:49,488 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 [2024-09-20 20:01:49,492 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 [2024-09-20 20:01:49,507 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 11 treesize of output 7 [2024-09-20 20:01:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 20:01:49,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 20:01:49,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:49,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992308642] [2024-09-20 20:01:49,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:49,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501400004] [2024-09-20 20:01:49,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501400004] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:01:49,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:01:49,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-20 20:01:49,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562222684] [2024-09-20 20:01:49,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:01:49,731 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 20:01:49,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:49,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 20:01:49,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:01:49,732 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 20:01:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:50,067 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2024-09-20 20:01:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 20:01:50,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-09-20 20:01:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:50,070 INFO L225 Difference]: With dead ends: 90 [2024-09-20 20:01:50,070 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 20:01:50,071 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-20 20:01:50,072 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:50,073 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 115 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:01:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 20:01:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2024-09-20 20:01:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-20 20:01:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2024-09-20 20:01:50,088 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 29 [2024-09-20 20:01:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:50,089 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2024-09-20 20:01:50,089 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 20:01:50,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2024-09-20 20:01:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 20:01:50,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:50,090 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] [2024-09-20 20:01:50,107 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 20:01:50,294 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:50,295 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:50,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:50,295 INFO L85 PathProgramCache]: Analyzing trace with hash -418634445, now seen corresponding path program 1 times [2024-09-20 20:01:50,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:50,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782410524] [2024-09-20 20:01:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:50,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:50,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:01:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:50,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:01:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:50,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:01:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:50,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:01:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 20:01:50,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:50,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782410524] [2024-09-20 20:01:50,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782410524] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:01:50,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:01:50,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-20 20:01:50,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099139601] [2024-09-20 20:01:50,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:01:50,964 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 20:01:50,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:50,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 20:01:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:01:50,965 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 20:01:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:51,395 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2024-09-20 20:01:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 20:01:51,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-09-20 20:01:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:51,398 INFO L225 Difference]: With dead ends: 81 [2024-09-20 20:01:51,398 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 20:01:51,399 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-20 20:01:51,400 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:51,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 108 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 20:01:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 20:01:51,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2024-09-20 20:01:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-20 20:01:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-20 20:01:51,426 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 29 [2024-09-20 20:01:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:51,429 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-20 20:01:51,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 20:01:51,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-20 20:01:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 20:01:51,431 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:51,431 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] [2024-09-20 20:01:51,431 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 20:01:51,431 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:51,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:51,431 INFO L85 PathProgramCache]: Analyzing trace with hash 661556601, now seen corresponding path program 1 times [2024-09-20 20:01:51,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:51,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560719439] [2024-09-20 20:01:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:51,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:51,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497345787] [2024-09-20 20:01:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:51,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:51,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:51,517 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) [2024-09-20 20:01:51,518 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 20:01:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:51,641 WARN L260 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 167 conjuncts are in the unsatisfiable core [2024-09-20 20:01:51,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:51,659 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 [2024-09-20 20:01:51,661 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 [2024-09-20 20:01:51,672 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 [2024-09-20 20:01:51,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:01:51,687 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 [2024-09-20 20:01:51,695 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 [2024-09-20 20:01:52,128 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 38 treesize of output 22 [2024-09-20 20:01:52,148 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 [2024-09-20 20:01:52,156 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 38 treesize of output 22 [2024-09-20 20:01:52,341 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 30 treesize of output 18 [2024-09-20 20:01:52,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:01:52,361 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 30 treesize of output 18 [2024-09-20 20:01:52,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:01:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 20:01:52,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:01:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 20:01:54,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:54,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560719439] [2024-09-20 20:01:54,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:54,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497345787] [2024-09-20 20:01:54,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497345787] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:01:54,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 20:01:54,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-09-20 20:01:54,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834860172] [2024-09-20 20:01:54,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 20:01:54,230 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 20:01:54,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:54,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 20:01:54,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-09-20 20:01:54,231 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 21 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 20:01:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:59,554 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2024-09-20 20:01:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 20:01:59,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-09-20 20:01:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:59,556 INFO L225 Difference]: With dead ends: 113 [2024-09-20 20:01:59,556 INFO L226 Difference]: Without dead ends: 109 [2024-09-20 20:01:59,557 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 20:01:59,557 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 214 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:59,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 243 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-20 20:01:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-20 20:01:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2024-09-20 20:01:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 62 states have internal predecessors, (72), 14 states have call successors, (14), 11 states have call predecessors, (14), 13 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-20 20:01:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2024-09-20 20:01:59,595 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 31 [2024-09-20 20:01:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:59,596 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2024-09-20 20:01:59,596 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 20:01:59,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2024-09-20 20:01:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 20:01:59,598 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:59,598 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] [2024-09-20 20:01:59,615 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 20:01:59,802 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 [2024-09-20 20:01:59,803 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:59,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:59,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1560377938, now seen corresponding path program 1 times [2024-09-20 20:01:59,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:59,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731340105] [2024-09-20 20:01:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:59,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:59,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129220550] [2024-09-20 20:01:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:59,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:59,844 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) [2024-09-20 20:01:59,847 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 20:01:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:59,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 20:01:59,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:59,966 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 11 [2024-09-20 20:01:59,968 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 [2024-09-20 20:02:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 20:02:00,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:02:00,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:00,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731340105] [2024-09-20 20:02:00,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:00,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129220550] [2024-09-20 20:02:00,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129220550] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:00,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:00,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 14 [2024-09-20 20:02:00,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631152523] [2024-09-20 20:02:00,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:02:00,210 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 20:02:00,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 20:02:00,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-09-20 20:02:00,211 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 20:02:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:00,396 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2024-09-20 20:02:00,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 20:02:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-09-20 20:02:00,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:00,398 INFO L225 Difference]: With dead ends: 91 [2024-09-20 20:02:00,398 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 20:02:00,398 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-09-20 20:02:00,399 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:00,399 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 190 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 20:02:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 20:02:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2024-09-20 20:02:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 12 states have call successors, (12), 9 states have call predecessors, (12), 11 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-20 20:02:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2024-09-20 20:02:00,444 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 35 [2024-09-20 20:02:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:00,444 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2024-09-20 20:02:00,444 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 20:02:00,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2024-09-20 20:02:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 20:02:00,446 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:00,446 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:02:00,464 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 20:02:00,646 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 [2024-09-20 20:02:00,647 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:00,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:00,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1573056070, now seen corresponding path program 1 times [2024-09-20 20:02:00,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:00,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664194611] [2024-09-20 20:02:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:00,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:01,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:02:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:01,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:02:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:01,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:02:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:01,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:01,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 20:02:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:01,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 20:02:01,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664194611] [2024-09-20 20:02:01,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664194611] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048205208] [2024-09-20 20:02:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:01,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:01,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:01,874 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) [2024-09-20 20:02:01,876 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 20:02:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:02,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 20:02:02,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:02,084 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 35 treesize of output 19 [2024-09-20 20:02:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:02:02,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:02:02,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048205208] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:02:02,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:02:02,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2024-09-20 20:02:02,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365908117] [2024-09-20 20:02:02,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:02,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 20:02:02,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:02,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 20:02:02,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-09-20 20:02:02,392 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 20:02:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:02,991 INFO L93 Difference]: Finished difference Result 114 states and 216 transitions. [2024-09-20 20:02:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 20:02:02,992 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 44 [2024-09-20 20:02:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:02,994 INFO L225 Difference]: With dead ends: 114 [2024-09-20 20:02:02,994 INFO L226 Difference]: Without dead ends: 97 [2024-09-20 20:02:02,996 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2024-09-20 20:02:02,997 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 135 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:02,998 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 100 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 20:02:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-20 20:02:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2024-09-20 20:02:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.320754716981132) internal successors, (70), 59 states have internal predecessors, (70), 14 states have call successors, (14), 9 states have call predecessors, (14), 11 states have return successors, (25), 10 states have call predecessors, (25), 12 states have call successors, (25) [2024-09-20 20:02:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2024-09-20 20:02:03,062 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 44 [2024-09-20 20:02:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:03,062 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2024-09-20 20:02:03,062 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 20:02:03,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2024-09-20 20:02:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 20:02:03,064 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:03,065 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2024-09-20 20:02:03,081 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 20:02:03,265 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 [2024-09-20 20:02:03,265 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:03,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:03,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2020846648, now seen corresponding path program 1 times [2024-09-20 20:02:03,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:03,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497995328] [2024-09-20 20:02:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:03,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:03,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:02:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:03,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:02:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:03,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:02:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:04,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:04,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 20:02:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:04,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 20:02:04,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:04,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497995328] [2024-09-20 20:02:04,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497995328] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:04,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441148198] [2024-09-20 20:02:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:04,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:04,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:04,078 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) [2024-09-20 20:02:04,079 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 20:02:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:04,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 20:02:04,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:04,239 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 23 treesize of output 15 [2024-09-20 20:02:04,244 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 [2024-09-20 20:02:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 20:02:04,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:02:05,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441148198] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:02:05,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:02:05,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 18] total 36 [2024-09-20 20:02:05,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903323824] [2024-09-20 20:02:05,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:05,322 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 20:02:05,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 20:02:05,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 20:02:05,324 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand has 36 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 29 states have internal predecessors, (52), 13 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (13), 10 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-20 20:02:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:06,520 INFO L93 Difference]: Finished difference Result 108 states and 181 transitions. [2024-09-20 20:02:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 20:02:06,521 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 29 states have internal predecessors, (52), 13 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (13), 10 states have call predecessors, (13), 12 states have call successors, (13) Word has length 44 [2024-09-20 20:02:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:06,522 INFO L225 Difference]: With dead ends: 108 [2024-09-20 20:02:06,522 INFO L226 Difference]: Without dead ends: 94 [2024-09-20 20:02:06,524 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=373, Invalid=2279, Unknown=0, NotChecked=0, Total=2652 [2024-09-20 20:02:06,525 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:06,525 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 216 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 20:02:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-20 20:02:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2024-09-20 20:02:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-20 20:02:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2024-09-20 20:02:06,563 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 44 [2024-09-20 20:02:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:06,563 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2024-09-20 20:02:06,564 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 29 states have internal predecessors, (52), 13 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (13), 10 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-20 20:02:06,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:06,564 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2024-09-20 20:02:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 20:02:06,565 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:06,565 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:02:06,584 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 20:02:06,766 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 [2024-09-20 20:02:06,767 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:06,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:06,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1016093312, now seen corresponding path program 1 times [2024-09-20 20:02:06,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:06,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422104416] [2024-09-20 20:02:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:06,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:06,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771983599] [2024-09-20 20:02:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:06,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:06,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:06,828 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) [2024-09-20 20:02:06,830 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 20:02:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:06,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-20 20:02:06,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:06,995 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 [2024-09-20 20:02:06,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:02:07,003 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 [2024-09-20 20:02:07,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:02:07,043 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 11 treesize of output 7 [2024-09-20 20:02:07,053 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 11 treesize of output 7 [2024-09-20 20:02:07,700 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 27 treesize of output 19 [2024-09-20 20:02:07,704 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 23 treesize of output 15 [2024-09-20 20:02:07,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:02:07,757 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 33 treesize of output 29 [2024-09-20 20:02:07,761 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 38 treesize of output 22 [2024-09-20 20:02:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:02:07,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:08,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:08,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422104416] [2024-09-20 20:02:08,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:08,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771983599] [2024-09-20 20:02:08,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771983599] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:08,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:08,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-20 20:02:08,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684052171] [2024-09-20 20:02:08,540 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:08,541 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 20:02:08,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:08,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 20:02:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-09-20 20:02:08,542 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 20 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 20:02:12,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:02:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:13,603 INFO L93 Difference]: Finished difference Result 89 states and 130 transitions. [2024-09-20 20:02:13,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 20:02:13,604 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2024-09-20 20:02:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:13,605 INFO L225 Difference]: With dead ends: 89 [2024-09-20 20:02:13,606 INFO L226 Difference]: Without dead ends: 87 [2024-09-20 20:02:13,606 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 20:02:13,607 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:13,607 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 203 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 728 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-09-20 20:02:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-20 20:02:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2024-09-20 20:02:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.290909090909091) internal successors, (71), 60 states have internal predecessors, (71), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-20 20:02:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 111 transitions. [2024-09-20 20:02:13,649 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 111 transitions. Word has length 46 [2024-09-20 20:02:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:13,650 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 111 transitions. [2024-09-20 20:02:13,650 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 20:02:13,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 111 transitions. [2024-09-20 20:02:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 20:02:13,652 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:13,652 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2024-09-20 20:02:13,664 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 20:02:13,852 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 [2024-09-20 20:02:13,852 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:13,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:13,853 INFO L85 PathProgramCache]: Analyzing trace with hash -921540890, now seen corresponding path program 1 times [2024-09-20 20:02:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:13,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714178017] [2024-09-20 20:02:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:13,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:13,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:02:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:13,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:02:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:13,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:02:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:13,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:13,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:02:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:13,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 20:02:13,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:13,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714178017] [2024-09-20 20:02:13,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714178017] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:02:13,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:02:13,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 20:02:13,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217956424] [2024-09-20 20:02:13,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:02:13,960 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 20:02:13,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:13,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 20:02:13,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 20:02:13,960 INFO L87 Difference]: Start difference. First operand 81 states and 111 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 20:02:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:14,083 INFO L93 Difference]: Finished difference Result 129 states and 193 transitions. [2024-09-20 20:02:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 20:02:14,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2024-09-20 20:02:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:14,085 INFO L225 Difference]: With dead ends: 129 [2024-09-20 20:02:14,085 INFO L226 Difference]: Without dead ends: 85 [2024-09-20 20:02:14,086 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 20:02:14,089 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:14,089 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 43 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 20:02:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-20 20:02:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2024-09-20 20:02:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.280701754385965) internal successors, (73), 62 states have internal predecessors, (73), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-20 20:02:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2024-09-20 20:02:14,127 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 48 [2024-09-20 20:02:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:14,128 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2024-09-20 20:02:14,128 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 20:02:14,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2024-09-20 20:02:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 20:02:14,130 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:14,130 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:02:14,130 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-20 20:02:14,130 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:14,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:14,131 INFO L85 PathProgramCache]: Analyzing trace with hash 264265128, now seen corresponding path program 1 times [2024-09-20 20:02:14,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:14,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679441327] [2024-09-20 20:02:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:14,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:14,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082250815] [2024-09-20 20:02:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:14,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:14,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:14,165 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) [2024-09-20 20:02:14,166 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 20:02:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:14,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-20 20:02:14,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:14,349 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 [2024-09-20 20:02:14,353 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 [2024-09-20 20:02:14,357 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 [2024-09-20 20:02:14,363 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 [2024-09-20 20:02:14,389 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 11 treesize of output 7 [2024-09-20 20:02:14,396 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 11 treesize of output 7 [2024-09-20 20:02:15,555 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 23 [2024-09-20 20:02:15,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 20:02:15,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:02:15,615 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 33 treesize of output 29 [2024-09-20 20:02:15,619 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 [2024-09-20 20:02:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:02:15,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:16,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:16,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679441327] [2024-09-20 20:02:16,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:16,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082250815] [2024-09-20 20:02:16,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082250815] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:16,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:16,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 20:02:16,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947576408] [2024-09-20 20:02:16,872 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:16,872 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 20:02:16,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:16,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 20:02:16,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2024-09-20 20:02:16,873 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 20:02:20,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:02:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:23,598 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2024-09-20 20:02:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 20:02:23,598 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2024-09-20 20:02:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:23,600 INFO L225 Difference]: With dead ends: 108 [2024-09-20 20:02:23,600 INFO L226 Difference]: Without dead ends: 106 [2024-09-20 20:02:23,601 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 20:02:23,601 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:23,601 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 183 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 802 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2024-09-20 20:02:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-20 20:02:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2024-09-20 20:02:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 67 states have internal predecessors, (80), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (29), 11 states have call predecessors, (29), 14 states have call successors, (29) [2024-09-20 20:02:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 125 transitions. [2024-09-20 20:02:23,640 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 125 transitions. Word has length 48 [2024-09-20 20:02:23,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:23,641 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 125 transitions. [2024-09-20 20:02:23,641 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 20:02:23,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 125 transitions. [2024-09-20 20:02:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 20:02:23,642 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:23,642 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2024-09-20 20:02:23,656 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 20:02:23,842 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:23,843 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:23,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash -436799450, now seen corresponding path program 1 times [2024-09-20 20:02:23,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:23,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888915639] [2024-09-20 20:02:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:23,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:23,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222485065] [2024-09-20 20:02:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:23,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:23,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:23,877 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) [2024-09-20 20:02:23,878 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 20:02:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:24,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 171 conjuncts are in the unsatisfiable core [2024-09-20 20:02:24,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:24,063 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 [2024-09-20 20:02:24,066 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 [2024-09-20 20:02:24,090 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 [2024-09-20 20:02:24,095 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 [2024-09-20 20:02:24,102 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 [2024-09-20 20:02:24,108 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 [2024-09-20 20:02:24,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:02:24,142 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 11 treesize of output 7 [2024-09-20 20:02:34,712 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 42 treesize of output 26 [2024-09-20 20:02:34,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 20:02:34,793 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 23 [2024-09-20 20:02:34,796 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 30 treesize of output 14 [2024-09-20 20:02:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 20:02:34,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:37,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:37,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888915639] [2024-09-20 20:02:37,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:37,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222485065] [2024-09-20 20:02:37,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222485065] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:37,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:37,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-09-20 20:02:37,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917060705] [2024-09-20 20:02:37,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:37,878 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 20:02:37,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 20:02:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=869, Unknown=2, NotChecked=0, Total=992 [2024-09-20 20:02:37,879 INFO L87 Difference]: Start difference. First operand 88 states and 125 transitions. Second operand has 29 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 20:02:41,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:02:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:44,544 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2024-09-20 20:02:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 20:02:44,545 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2024-09-20 20:02:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:44,547 INFO L225 Difference]: With dead ends: 108 [2024-09-20 20:02:44,547 INFO L226 Difference]: Without dead ends: 106 [2024-09-20 20:02:44,548 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=197, Invalid=1523, Unknown=2, NotChecked=0, Total=1722 [2024-09-20 20:02:44,548 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:44,548 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 226 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 972 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2024-09-20 20:02:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-20 20:02:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2024-09-20 20:02:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 73 states have internal predecessors, (88), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (38), 11 states have call predecessors, (38), 15 states have call successors, (38) [2024-09-20 20:02:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 143 transitions. [2024-09-20 20:02:44,600 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 143 transitions. Word has length 48 [2024-09-20 20:02:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:44,601 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 143 transitions. [2024-09-20 20:02:44,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 20:02:44,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 143 transitions. [2024-09-20 20:02:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 20:02:44,603 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:44,603 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2024-09-20 20:02:44,621 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 20:02:44,806 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 20:02:44,807 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:44,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:44,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1140395608, now seen corresponding path program 1 times [2024-09-20 20:02:44,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:44,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528138389] [2024-09-20 20:02:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:44,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:45,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:02:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:45,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:02:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:45,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:02:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:45,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:45,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:02:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:45,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 20:02:45,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:45,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528138389] [2024-09-20 20:02:45,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528138389] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:02:45,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:02:45,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 20:02:45,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253628827] [2024-09-20 20:02:45,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:02:45,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 20:02:45,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:45,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 20:02:45,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 20:02:45,317 INFO L87 Difference]: Start difference. First operand 95 states and 143 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 20:02:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:45,612 INFO L93 Difference]: Finished difference Result 157 states and 272 transitions. [2024-09-20 20:02:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 20:02:45,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2024-09-20 20:02:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:45,613 INFO L225 Difference]: With dead ends: 157 [2024-09-20 20:02:45,613 INFO L226 Difference]: Without dead ends: 93 [2024-09-20 20:02:45,614 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-09-20 20:02:45,615 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:45,615 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 65 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:02:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-20 20:02:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2024-09-20 20:02:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 68 states have internal predecessors, (78), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (34), 11 states have call predecessors, (34), 14 states have call successors, (34) [2024-09-20 20:02:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2024-09-20 20:02:45,660 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 48 [2024-09-20 20:02:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:45,660 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2024-09-20 20:02:45,660 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 20:02:45,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2024-09-20 20:02:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 20:02:45,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:45,662 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2024-09-20 20:02:45,662 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-20 20:02:45,662 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:45,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash -632852570, now seen corresponding path program 1 times [2024-09-20 20:02:45,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:45,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96901612] [2024-09-20 20:02:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:46,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:02:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:46,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:02:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:46,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:02:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:46,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:46,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:02:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:46,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 20:02:46,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:46,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96901612] [2024-09-20 20:02:46,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96901612] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:02:46,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:02:46,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 20:02:46,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629298429] [2024-09-20 20:02:46,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:02:46,176 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 20:02:46,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:46,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 20:02:46,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 20:02:46,177 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 20:02:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:46,408 INFO L93 Difference]: Finished difference Result 145 states and 233 transitions. [2024-09-20 20:02:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 20:02:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2024-09-20 20:02:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:46,410 INFO L225 Difference]: With dead ends: 145 [2024-09-20 20:02:46,410 INFO L226 Difference]: Without dead ends: 92 [2024-09-20 20:02:46,411 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-20 20:02:46,412 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:46,412 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 66 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 20:02:46,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-20 20:02:46,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2024-09-20 20:02:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 67 states have internal predecessors, (76), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (34), 11 states have call predecessors, (34), 14 states have call successors, (34) [2024-09-20 20:02:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 126 transitions. [2024-09-20 20:02:46,461 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 126 transitions. Word has length 48 [2024-09-20 20:02:46,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:46,461 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 126 transitions. [2024-09-20 20:02:46,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 20:02:46,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 126 transitions. [2024-09-20 20:02:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 20:02:46,463 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:46,463 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2024-09-20 20:02:46,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-09-20 20:02:46,463 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:46,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:46,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1274409114, now seen corresponding path program 1 times [2024-09-20 20:02:46,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:46,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081302426] [2024-09-20 20:02:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:46,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:46,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912869765] [2024-09-20 20:02:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:46,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:46,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:46,507 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) [2024-09-20 20:02:46,512 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 20:02:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:46,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-20 20:02:46,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:46,685 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 [2024-09-20 20:02:46,689 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 [2024-09-20 20:02:46,696 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 [2024-09-20 20:02:46,701 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 [2024-09-20 20:02:46,709 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 [2024-09-20 20:02:46,726 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 11 treesize of output 7 [2024-09-20 20:02:46,734 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 11 treesize of output 7 [2024-09-20 20:02:47,244 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 27 treesize of output 19 [2024-09-20 20:02:47,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 20:02:47,272 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 19 treesize of output 11 [2024-09-20 20:02:47,274 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 [2024-09-20 20:02:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:02:47,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:48,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:48,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081302426] [2024-09-20 20:02:48,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:48,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912869765] [2024-09-20 20:02:48,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912869765] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:48,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:48,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-20 20:02:48,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509170150] [2024-09-20 20:02:48,050 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:48,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 20:02:48,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:48,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 20:02:48,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-09-20 20:02:48,051 INFO L87 Difference]: Start difference. First operand 89 states and 126 transitions. Second operand has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 20:02:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:48,689 INFO L93 Difference]: Finished difference Result 101 states and 149 transitions. [2024-09-20 20:02:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 20:02:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2024-09-20 20:02:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:48,690 INFO L225 Difference]: With dead ends: 101 [2024-09-20 20:02:48,690 INFO L226 Difference]: Without dead ends: 99 [2024-09-20 20:02:48,691 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-09-20 20:02:48,691 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:48,691 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 169 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 20:02:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-20 20:02:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2024-09-20 20:02:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 68 states have internal predecessors, (76), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (38), 11 states have call predecessors, (38), 15 states have call successors, (38) [2024-09-20 20:02:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 131 transitions. [2024-09-20 20:02:48,745 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 131 transitions. Word has length 48 [2024-09-20 20:02:48,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:48,745 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 131 transitions. [2024-09-20 20:02:48,745 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 20:02:48,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 131 transitions. [2024-09-20 20:02:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 20:02:48,746 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:48,747 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:02:48,764 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 20:02:48,947 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 20:02:48,947 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:48,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:48,948 INFO L85 PathProgramCache]: Analyzing trace with hash 130251622, now seen corresponding path program 1 times [2024-09-20 20:02:48,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:48,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709092635] [2024-09-20 20:02:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:49,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:02:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:49,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:02:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:49,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:02:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:49,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:49,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:02:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:49,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 20:02:49,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:49,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709092635] [2024-09-20 20:02:49,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709092635] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:02:49,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:02:49,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-20 20:02:49,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319972341] [2024-09-20 20:02:49,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:02:49,476 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 20:02:49,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 20:02:49,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 20:02:49,477 INFO L87 Difference]: Start difference. First operand 90 states and 131 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 20:02:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:49,889 INFO L93 Difference]: Finished difference Result 119 states and 236 transitions. [2024-09-20 20:02:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 20:02:49,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-09-20 20:02:49,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:49,891 INFO L225 Difference]: With dead ends: 119 [2024-09-20 20:02:49,892 INFO L226 Difference]: Without dead ends: 107 [2024-09-20 20:02:49,892 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-09-20 20:02:49,892 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:49,893 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 101 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 20:02:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-20 20:02:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 88. [2024-09-20 20:02:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 66 states have internal predecessors, (74), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (33), 11 states have call predecessors, (33), 14 states have call successors, (33) [2024-09-20 20:02:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2024-09-20 20:02:49,946 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 48 [2024-09-20 20:02:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:49,947 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2024-09-20 20:02:49,947 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 20:02:49,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2024-09-20 20:02:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 20:02:49,949 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:49,949 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2024-09-20 20:02:49,949 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-09-20 20:02:49,949 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:49,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash -851707288, now seen corresponding path program 1 times [2024-09-20 20:02:49,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:49,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628415118] [2024-09-20 20:02:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:49,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:50,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:02:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:50,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:02:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:50,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:02:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:50,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:50,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:02:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:50,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 20:02:50,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:50,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628415118] [2024-09-20 20:02:50,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628415118] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:02:50,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:02:50,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 20:02:50,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059151154] [2024-09-20 20:02:50,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:02:50,594 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:02:50,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:50,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:02:50,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-20 20:02:50,595 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 20:02:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:50,875 INFO L93 Difference]: Finished difference Result 126 states and 246 transitions. [2024-09-20 20:02:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 20:02:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-09-20 20:02:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:50,877 INFO L225 Difference]: With dead ends: 126 [2024-09-20 20:02:50,877 INFO L226 Difference]: Without dead ends: 106 [2024-09-20 20:02:50,877 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-09-20 20:02:50,878 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 44 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:50,878 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 97 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:02:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-20 20:02:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2024-09-20 20:02:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 69 states have internal predecessors, (75), 18 states have call successors, (18), 10 states have call predecessors, (18), 12 states have return successors, (45), 12 states have call predecessors, (45), 16 states have call successors, (45) [2024-09-20 20:02:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 138 transitions. [2024-09-20 20:02:50,931 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 138 transitions. Word has length 48 [2024-09-20 20:02:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:50,931 INFO L474 AbstractCegarLoop]: Abstraction has 92 states and 138 transitions. [2024-09-20 20:02:50,931 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 20:02:50,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 138 transitions. [2024-09-20 20:02:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 20:02:50,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:50,933 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2024-09-20 20:02:50,933 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-09-20 20:02:50,933 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:50,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:50,933 INFO L85 PathProgramCache]: Analyzing trace with hash -570812956, now seen corresponding path program 1 times [2024-09-20 20:02:50,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:50,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241615620] [2024-09-20 20:02:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:50,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:50,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552880568] [2024-09-20 20:02:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:50,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:50,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:50,961 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) [2024-09-20 20:02:50,962 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 20:02:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:51,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-09-20 20:02:51,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:51,155 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 [2024-09-20 20:02:51,178 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 [2024-09-20 20:02:51,182 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 [2024-09-20 20:02:51,188 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 [2024-09-20 20:02:51,194 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 [2024-09-20 20:02:51,214 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 11 treesize of output 7 [2024-09-20 20:02:51,221 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 11 treesize of output 7 [2024-09-20 20:02:52,303 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 46 treesize of output 30 [2024-09-20 20:02:52,307 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 23 treesize of output 15 [2024-09-20 20:02:52,353 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 [2024-09-20 20:02:52,355 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 34 treesize of output 18 [2024-09-20 20:02:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:02:52,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:57,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:57,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241615620] [2024-09-20 20:02:57,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:57,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552880568] [2024-09-20 20:02:57,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552880568] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:57,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:57,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 20:02:57,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533251161] [2024-09-20 20:02:57,688 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:57,688 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 20:02:57,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:57,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 20:02:57,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=707, Unknown=1, NotChecked=0, Total=812 [2024-09-20 20:02:57,689 INFO L87 Difference]: Start difference. First operand 92 states and 138 transitions. Second operand has 24 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 20:03:01,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:03:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:03,370 INFO L93 Difference]: Finished difference Result 103 states and 157 transitions. [2024-09-20 20:03:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 20:03:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2024-09-20 20:03:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:03,371 INFO L225 Difference]: With dead ends: 103 [2024-09-20 20:03:03,371 INFO L226 Difference]: Without dead ends: 101 [2024-09-20 20:03:03,372 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=170, Invalid=1235, Unknown=1, NotChecked=0, Total=1406 [2024-09-20 20:03:03,372 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 54 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:03,372 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 215 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 665 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2024-09-20 20:03:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-20 20:03:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2024-09-20 20:03:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 68 states have internal predecessors, (75), 17 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (40), 12 states have call predecessors, (40), 15 states have call successors, (40) [2024-09-20 20:03:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 132 transitions. [2024-09-20 20:03:03,418 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 132 transitions. Word has length 48 [2024-09-20 20:03:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:03,418 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 132 transitions. [2024-09-20 20:03:03,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 20:03:03,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 132 transitions. [2024-09-20 20:03:03,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 20:03:03,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:03,420 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:03,439 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 20:03:03,624 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 20:03:03,625 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:03,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:03,625 INFO L85 PathProgramCache]: Analyzing trace with hash -536058545, now seen corresponding path program 1 times [2024-09-20 20:03:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:03,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017965612] [2024-09-20 20:03:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:03,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:04,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:03:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:04,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:03:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:04,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:03:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:04,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:03:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:04,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:03:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:05,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:03:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:05,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 20:03:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:05,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:03:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 20:03:05,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017965612] [2024-09-20 20:03:05,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017965612] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:05,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920252987] [2024-09-20 20:03:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:05,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:05,117 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:05,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 20:03:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:05,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 20:03:05,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:05,420 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 35 treesize of output 19 [2024-09-20 20:03:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 20:03:05,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 20:03:05,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920252987] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:03:05,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:03:05,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2024-09-20 20:03:05,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763818839] [2024-09-20 20:03:05,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:05,714 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 20:03:05,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:05,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 20:03:05,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-09-20 20:03:05,715 INFO L87 Difference]: Start difference. First operand 91 states and 132 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-20 20:03:06,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:06,109 INFO L93 Difference]: Finished difference Result 111 states and 187 transitions. [2024-09-20 20:03:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 20:03:06,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 63 [2024-09-20 20:03:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:06,110 INFO L225 Difference]: With dead ends: 111 [2024-09-20 20:03:06,110 INFO L226 Difference]: Without dead ends: 95 [2024-09-20 20:03:06,111 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2024-09-20 20:03:06,111 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:06,112 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 98 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:03:06,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-20 20:03:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2024-09-20 20:03:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 64 states have internal predecessors, (73), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2024-09-20 20:03:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2024-09-20 20:03:06,163 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 63 [2024-09-20 20:03:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:06,163 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2024-09-20 20:03:06,163 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-20 20:03:06,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2024-09-20 20:03:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 20:03:06,164 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:06,164 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:06,181 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 20:03:06,365 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:06,365 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:06,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1482227333, now seen corresponding path program 1 times [2024-09-20 20:03:06,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:06,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431973008] [2024-09-20 20:03:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:06,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:06,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534937818] [2024-09-20 20:03:06,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:06,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:06,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:06,403 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:06,406 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 20:03:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:06,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-20 20:03:06,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:06,629 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 [2024-09-20 20:03:06,632 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 [2024-09-20 20:03:06,636 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 [2024-09-20 20:03:06,640 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 [2024-09-20 20:03:06,645 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 [2024-09-20 20:03:06,660 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 11 treesize of output 7 [2024-09-20 20:03:06,663 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 11 treesize of output 7 [2024-09-20 20:03:07,754 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 28 [2024-09-20 20:03:07,758 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 27 treesize of output 19 [2024-09-20 20:03:07,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-20 20:03:07,806 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 [2024-09-20 20:03:07,811 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 23 treesize of output 15 [2024-09-20 20:03:07,814 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 [2024-09-20 20:03:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 20:03:07,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:13,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:13,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431973008] [2024-09-20 20:03:13,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:13,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534937818] [2024-09-20 20:03:13,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534937818] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:13,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:13,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-20 20:03:13,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748809958] [2024-09-20 20:03:13,510 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:13,510 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 20:03:13,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:13,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 20:03:13,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-09-20 20:03:13,511 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand has 21 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 20:03:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:14,630 INFO L93 Difference]: Finished difference Result 100 states and 145 transitions. [2024-09-20 20:03:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 20:03:14,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 61 [2024-09-20 20:03:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:14,632 INFO L225 Difference]: With dead ends: 100 [2024-09-20 20:03:14,632 INFO L226 Difference]: Without dead ends: 98 [2024-09-20 20:03:14,632 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2024-09-20 20:03:14,633 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:14,633 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 186 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 20:03:14,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-20 20:03:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2024-09-20 20:03:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 67 states have internal predecessors, (74), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (36), 11 states have call predecessors, (36), 15 states have call successors, (36) [2024-09-20 20:03:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2024-09-20 20:03:14,676 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 61 [2024-09-20 20:03:14,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:14,676 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2024-09-20 20:03:14,676 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 20:03:14,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2024-09-20 20:03:14,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 20:03:14,677 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:14,677 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 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, 1, 1, 1] [2024-09-20 20:03:14,694 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 20:03:14,881 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:14,882 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:14,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:14,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1770581795, now seen corresponding path program 1 times [2024-09-20 20:03:14,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:14,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969051043] [2024-09-20 20:03:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:14,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:15,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:03:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:15,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:03:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:15,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:03:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:15,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:03:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:15,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:03:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:15,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:03:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:15,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 20:03:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 20:03:15,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969051043] [2024-09-20 20:03:15,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969051043] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:03:15,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:03:15,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-20 20:03:15,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147415960] [2024-09-20 20:03:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:03:15,443 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 20:03:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 20:03:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 20:03:15,444 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 20:03:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:15,761 INFO L93 Difference]: Finished difference Result 121 states and 229 transitions. [2024-09-20 20:03:15,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 20:03:15,762 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2024-09-20 20:03:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:15,763 INFO L225 Difference]: With dead ends: 121 [2024-09-20 20:03:15,763 INFO L226 Difference]: Without dead ends: 101 [2024-09-20 20:03:15,763 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-09-20 20:03:15,764 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 55 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:15,764 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 92 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:03:15,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-20 20:03:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2024-09-20 20:03:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 65 states have internal predecessors, (72), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-09-20 20:03:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2024-09-20 20:03:15,820 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 54 [2024-09-20 20:03:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:15,820 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2024-09-20 20:03:15,820 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 20:03:15,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2024-09-20 20:03:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 20:03:15,822 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:15,822 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 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, 1] [2024-09-20 20:03:15,822 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-09-20 20:03:15,822 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:15,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:15,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1521485639, now seen corresponding path program 1 times [2024-09-20 20:03:15,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:15,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510331545] [2024-09-20 20:03:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:15,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:15,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738321751] [2024-09-20 20:03:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:15,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:15,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:15,846 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:15,847 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 20:03:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:16,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-20 20:03:16,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:16,076 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 [2024-09-20 20:03:16,078 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 [2024-09-20 20:03:16,270 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 25 treesize of output 13 [2024-09-20 20:03:16,472 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 [2024-09-20 20:03:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:03:16,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:16,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:16,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510331545] [2024-09-20 20:03:16,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:16,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738321751] [2024-09-20 20:03:16,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738321751] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:16,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:16,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 20:03:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148596656] [2024-09-20 20:03:16,592 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:16,592 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 20:03:16,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 20:03:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-09-20 20:03:16,593 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand has 24 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 20:03:21,018 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] [2024-09-20 20:03:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:21,337 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2024-09-20 20:03:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 20:03:21,338 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2024-09-20 20:03:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:21,339 INFO L225 Difference]: With dead ends: 112 [2024-09-20 20:03:21,339 INFO L226 Difference]: Without dead ends: 96 [2024-09-20 20:03:21,340 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2024-09-20 20:03:21,340 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 29 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:21,341 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 165 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 802 Invalid, 6 Unknown, 0 Unchecked, 4.4s Time] [2024-09-20 20:03:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-20 20:03:21,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2024-09-20 20:03:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 68 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (38), 13 states have call predecessors, (38), 14 states have call successors, (38) [2024-09-20 20:03:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 131 transitions. [2024-09-20 20:03:21,398 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 131 transitions. Word has length 52 [2024-09-20 20:03:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:21,399 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 131 transitions. [2024-09-20 20:03:21,399 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 20:03:21,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 131 transitions. [2024-09-20 20:03:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 20:03:21,400 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:21,400 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 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, 1] [2024-09-20 20:03:21,418 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 20:03:21,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 20:03:21,605 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:21,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:21,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1183574303, now seen corresponding path program 1 times [2024-09-20 20:03:21,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:21,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25895491] [2024-09-20 20:03:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:21,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:21,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989615080] [2024-09-20 20:03:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:21,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:21,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:21,628 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:21,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 20:03:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:21,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 20:03:21,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:21,880 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 [2024-09-20 20:03:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:03:21,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:22,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:22,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25895491] [2024-09-20 20:03:22,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:22,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989615080] [2024-09-20 20:03:22,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989615080] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:22,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:22,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-20 20:03:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773985125] [2024-09-20 20:03:22,244 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:22,244 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 20:03:22,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 20:03:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-20 20:03:22,245 INFO L87 Difference]: Start difference. First operand 93 states and 131 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 20:03:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:22,570 INFO L93 Difference]: Finished difference Result 119 states and 168 transitions. [2024-09-20 20:03:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 20:03:22,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2024-09-20 20:03:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:22,571 INFO L225 Difference]: With dead ends: 119 [2024-09-20 20:03:22,571 INFO L226 Difference]: Without dead ends: 103 [2024-09-20 20:03:22,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-09-20 20:03:22,572 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:22,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 157 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:03:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-20 20:03:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2024-09-20 20:03:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.2) internal successors, (78), 70 states have internal predecessors, (78), 17 states have call successors, (17), 11 states have call predecessors, (17), 14 states have return successors, (51), 15 states have call predecessors, (51), 14 states have call successors, (51) [2024-09-20 20:03:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 146 transitions. [2024-09-20 20:03:22,620 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 146 transitions. Word has length 54 [2024-09-20 20:03:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:22,620 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 146 transitions. [2024-09-20 20:03:22,621 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 20:03:22,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:22,621 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 146 transitions. [2024-09-20 20:03:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 20:03:22,622 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:22,622 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2024-09-20 20:03:22,637 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-20 20:03:22,822 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 20:03:22,822 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:22,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:22,823 INFO L85 PathProgramCache]: Analyzing trace with hash -363139833, now seen corresponding path program 1 times [2024-09-20 20:03:22,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:22,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452671790] [2024-09-20 20:03:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:22,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:22,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:03:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:22,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:03:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:22,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:03:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:22,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:03:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:22,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 20:03:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:22,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:03:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:22,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:03:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:22,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:03:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-20 20:03:22,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:22,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452671790] [2024-09-20 20:03:22,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452671790] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:22,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205476027] [2024-09-20 20:03:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:22,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:22,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:22,917 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:22,919 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 20:03:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:23,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-09-20 20:03:23,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 20:03:23,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 20:03:23,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205476027] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:03:23,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:23,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-09-20 20:03:23,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268573974] [2024-09-20 20:03:23,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:03:23,102 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 20:03:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:23,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 20:03:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 20:03:23,103 INFO L87 Difference]: Start difference. First operand 97 states and 146 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 20:03:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:23,156 INFO L93 Difference]: Finished difference Result 157 states and 256 transitions. [2024-09-20 20:03:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 20:03:23,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2024-09-20 20:03:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:23,157 INFO L225 Difference]: With dead ends: 157 [2024-09-20 20:03:23,157 INFO L226 Difference]: Without dead ends: 97 [2024-09-20 20:03:23,158 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 20:03:23,158 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:23,158 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 20:03:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-20 20:03:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-09-20 20:03:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 70 states have internal predecessors, (77), 17 states have call successors, (17), 11 states have call predecessors, (17), 14 states have return successors, (51), 15 states have call predecessors, (51), 14 states have call successors, (51) [2024-09-20 20:03:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 145 transitions. [2024-09-20 20:03:23,210 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 145 transitions. Word has length 61 [2024-09-20 20:03:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:23,210 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 145 transitions. [2024-09-20 20:03:23,210 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 20:03:23,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 145 transitions. [2024-09-20 20:03:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 20:03:23,211 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:23,211 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:23,228 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 20:03:23,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:23,412 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:23,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash -511014421, now seen corresponding path program 2 times [2024-09-20 20:03:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:23,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43889197] [2024-09-20 20:03:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:23,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699976237] [2024-09-20 20:03:23,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:03:23,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:23,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:23,443 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:23,445 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 20:03:23,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:03:23,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:03:23,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-20 20:03:23,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:23,717 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 [2024-09-20 20:03:23,719 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 [2024-09-20 20:03:23,723 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 [2024-09-20 20:03:23,728 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 [2024-09-20 20:03:23,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:03:23,748 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 11 treesize of output 7 [2024-09-20 20:03:23,751 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 11 treesize of output 7 [2024-09-20 20:03:24,888 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 28 [2024-09-20 20:03:24,891 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 27 treesize of output 19 [2024-09-20 20:03:24,896 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 30 treesize of output 18 [2024-09-20 20:03:24,929 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 32 treesize of output 20 [2024-09-20 20:03:24,932 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 [2024-09-20 20:03:24,936 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 [2024-09-20 20:03:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 20:03:25,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:29,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:29,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43889197] [2024-09-20 20:03:29,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:29,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699976237] [2024-09-20 20:03:29,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699976237] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:29,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:29,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-20 20:03:29,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635051532] [2024-09-20 20:03:29,370 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:29,370 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 20:03:29,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 20:03:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2024-09-20 20:03:29,371 INFO L87 Difference]: Start difference. First operand 97 states and 145 transitions. Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 20:03:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:30,894 INFO L93 Difference]: Finished difference Result 108 states and 175 transitions. [2024-09-20 20:03:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 20:03:30,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 63 [2024-09-20 20:03:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:30,896 INFO L225 Difference]: With dead ends: 108 [2024-09-20 20:03:30,896 INFO L226 Difference]: Without dead ends: 102 [2024-09-20 20:03:30,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-09-20 20:03:30,897 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:30,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 20:03:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-20 20:03:30,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2024-09-20 20:03:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 72 states have internal predecessors, (78), 18 states have call successors, (18), 11 states have call predecessors, (18), 15 states have return successors, (64), 16 states have call predecessors, (64), 15 states have call successors, (64) [2024-09-20 20:03:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 160 transitions. [2024-09-20 20:03:30,964 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 160 transitions. Word has length 63 [2024-09-20 20:03:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:30,965 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 160 transitions. [2024-09-20 20:03:30,965 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 20:03:30,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 160 transitions. [2024-09-20 20:03:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 20:03:30,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:30,966 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:30,983 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-20 20:03:31,170 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:31,171 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:31,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash 686182317, now seen corresponding path program 1 times [2024-09-20 20:03:31,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:31,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609537225] [2024-09-20 20:03:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:31,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:31,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397816929] [2024-09-20 20:03:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:31,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:31,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:31,226 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:31,227 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 20:03:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:31,543 WARN L260 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 269 conjuncts are in the unsatisfiable core [2024-09-20 20:03:31,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:31,554 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 [2024-09-20 20:03:31,555 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 [2024-09-20 20:03:31,573 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 [2024-09-20 20:03:31,577 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 [2024-09-20 20:03:31,581 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 [2024-09-20 20:03:31,586 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 [2024-09-20 20:03:31,603 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 11 treesize of output 7 [2024-09-20 20:03:31,611 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 11 treesize of output 7 [2024-09-20 20:03:34,962 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 45 treesize of output 37 [2024-09-20 20:03:34,968 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 44 treesize of output 36 [2024-09-20 20:03:34,974 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 36 treesize of output 28 [2024-09-20 20:03:34,977 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 24 [2024-09-20 20:03:37,877 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 105 treesize of output 81 [2024-09-20 20:03:37,889 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 27 treesize of output 19 [2024-09-20 20:03:37,907 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 30 treesize of output 18 [2024-09-20 20:03:38,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:03:38,183 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 102 treesize of output 78 [2024-09-20 20:03:38,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2024-09-20 20:03:38,196 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 45 treesize of output 33 [2024-09-20 20:03:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 20:03:38,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:57,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:57,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609537225] [2024-09-20 20:03:57,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:57,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397816929] [2024-09-20 20:03:57,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397816929] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:57,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:57,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-09-20 20:03:57,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154643326] [2024-09-20 20:03:57,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:57,974 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 20:03:57,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 20:03:57,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1116, Unknown=1, NotChecked=0, Total=1260 [2024-09-20 20:03:57,975 INFO L87 Difference]: Start difference. First operand 100 states and 160 transitions. Second operand has 32 states, 25 states have (on average 1.64) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 20:04:02,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:04:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:12,081 INFO L93 Difference]: Finished difference Result 133 states and 241 transitions. [2024-09-20 20:04:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-20 20:04:12,082 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.64) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 63 [2024-09-20 20:04:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:12,083 INFO L225 Difference]: With dead ends: 133 [2024-09-20 20:04:12,083 INFO L226 Difference]: Without dead ends: 115 [2024-09-20 20:04:12,084 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=275, Invalid=2274, Unknown=1, NotChecked=0, Total=2550 [2024-09-20 20:04:12,084 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:12,084 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 217 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1271 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2024-09-20 20:04:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-20 20:04:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2024-09-20 20:04:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 76 states have internal predecessors, (82), 19 states have call successors, (19), 11 states have call predecessors, (19), 17 states have return successors, (84), 18 states have call predecessors, (84), 16 states have call successors, (84) [2024-09-20 20:04:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 185 transitions. [2024-09-20 20:04:12,154 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 185 transitions. Word has length 63 [2024-09-20 20:04:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:12,154 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 185 transitions. [2024-09-20 20:04:12,154 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.64) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 20:04:12,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 185 transitions. [2024-09-20 20:04:12,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 20:04:12,156 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:12,156 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:04:12,170 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 20:04:12,356 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 20:04:12,356 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:12,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:12,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1272988331, now seen corresponding path program 1 times [2024-09-20 20:04:12,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:12,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399568930] [2024-09-20 20:04:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:12,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:04:12,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980573162] [2024-09-20 20:04:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:12,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:12,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:04:12,389 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:04:12,390 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 20:04:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:12,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-09-20 20:04:12,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:04:12,706 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 [2024-09-20 20:04:12,708 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 [2024-09-20 20:04:12,712 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 [2024-09-20 20:04:12,717 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 [2024-09-20 20:04:12,721 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 [2024-09-20 20:04:12,727 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 [2024-09-20 20:04:12,743 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 11 treesize of output 7 [2024-09-20 20:04:12,750 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 11 treesize of output 7 [2024-09-20 20:04:19,075 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 59 treesize of output 39 [2024-09-20 20:04:19,081 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 27 treesize of output 19 [2024-09-20 20:04:19,091 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 30 treesize of output 18 [2024-09-20 20:04:19,192 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 [2024-09-20 20:04:19,198 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 23 treesize of output 15 [2024-09-20 20:04:19,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2024-09-20 20:04:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 20:04:19,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:04:25,911 WARN L293 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 213 DAG size of output: 197 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-20 20:04:28,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:28,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399568930] [2024-09-20 20:04:28,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:04:28,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980573162] [2024-09-20 20:04:28,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980573162] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:28,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:04:28,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 20:04:28,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061081876] [2024-09-20 20:04:28,460 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:28,460 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 20:04:28,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 20:04:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2024-09-20 20:04:28,461 INFO L87 Difference]: Start difference. First operand 106 states and 185 transitions. Second operand has 23 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 20:04:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:30,986 INFO L93 Difference]: Finished difference Result 116 states and 211 transitions. [2024-09-20 20:04:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 20:04:30,987 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 63 [2024-09-20 20:04:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:30,988 INFO L225 Difference]: With dead ends: 116 [2024-09-20 20:04:30,988 INFO L226 Difference]: Without dead ends: 110 [2024-09-20 20:04:30,989 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 20:04:30,989 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:30,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 162 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-20 20:04:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-20 20:04:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2024-09-20 20:04:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 76 states have internal predecessors, (82), 19 states have call successors, (19), 11 states have call predecessors, (19), 17 states have return successors, (83), 18 states have call predecessors, (83), 16 states have call successors, (83) [2024-09-20 20:04:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 184 transitions. [2024-09-20 20:04:31,071 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 184 transitions. Word has length 63 [2024-09-20 20:04:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:31,072 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 184 transitions. [2024-09-20 20:04:31,072 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 20:04:31,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 184 transitions. [2024-09-20 20:04:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 20:04:31,073 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:31,073 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:04:31,092 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 20:04:31,274 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 20:04:31,274 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:31,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:31,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1335027945, now seen corresponding path program 1 times [2024-09-20 20:04:31,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:31,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013249213] [2024-09-20 20:04:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:31,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:04:31,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129194598] [2024-09-20 20:04:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:31,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:31,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:04:31,319 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:04:31,320 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 20:04:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:31,570 WARN L260 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 254 conjuncts are in the unsatisfiable core [2024-09-20 20:04:31,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:04:31,580 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 [2024-09-20 20:04:31,582 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 [2024-09-20 20:04:31,584 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 [2024-09-20 20:04:31,587 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 [2024-09-20 20:04:31,590 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 [2024-09-20 20:04:31,594 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 [2024-09-20 20:04:31,607 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 11 treesize of output 7 [2024-09-20 20:04:31,615 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 11 treesize of output 7 [2024-09-20 20:04:35,402 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 63 treesize of output 43 [2024-09-20 20:04:35,413 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 27 treesize of output 19 [2024-09-20 20:04:35,451 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 30 treesize of output 18 [2024-09-20 20:04:35,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 48 [2024-09-20 20:04:35,600 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 [2024-09-20 20:04:35,602 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 [2024-09-20 20:04:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 20:04:35,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:04:47,278 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_0_to_51_0_#in~q.base|)) (.cse3 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_0_to_51_0_#in~a.base|) |c_func_to_recursive_line_0_to_51_0_#in~a.offset|))) (let ((.cse2 (+ (select .cse1 |c_func_to_recursive_line_0_to_51_0_#in~q.offset|) (* (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_0_to_51_0_#in~p.base|) |c_func_to_recursive_line_0_to_51_0_#in~p.offset|) .cse3))) (.cse4 (forall ((|v_func_to_recursive_line_0_to_51_0_#in~y.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_0_to_51_0_#in~q.base_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_0_to_51_0_#in~y.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_0_to_51_0_#in~x.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_0_to_51_0_#in~x.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_0_to_51_0_#in~q.offset_BEFORE_CALL_34| Int)) (= (* (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_51_0_#in~y.base_BEFORE_CALL_14|) |v_func_to_recursive_line_0_to_51_0_#in~y.offset_BEFORE_CALL_14|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_0_to_51_0_#in~x.base_BEFORE_CALL_14|) |v_func_to_recursive_line_0_to_51_0_#in~x.offset_BEFORE_CALL_14|)) (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_51_0_#in~q.base_BEFORE_CALL_34|) |v_func_to_recursive_line_0_to_51_0_#in~q.offset_BEFORE_CALL_34|))))) (and (forall ((|v_func_to_recursive_line_0_to_51_0_#in~y.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_0_to_51_0_#in~q.base_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_0_to_51_0_#in~y.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_0_to_51_0_#in~x.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_0_to_51_0_#in~q.offset_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_0_to_51_0_#in~x.base_BEFORE_CALL_14| Int)) (let ((.cse0 (* (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_51_0_#in~y.base_BEFORE_CALL_14|) |v_func_to_recursive_line_0_to_51_0_#in~y.offset_BEFORE_CALL_14|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_0_to_51_0_#in~x.base_BEFORE_CALL_14|) |v_func_to_recursive_line_0_to_51_0_#in~x.offset_BEFORE_CALL_14|)))) (or (= .cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_51_0_#in~q.base_BEFORE_CALL_34|) |v_func_to_recursive_line_0_to_51_0_#in~q.offset_BEFORE_CALL_34|)) (not (= .cse0 (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_0_to_51_0_#in~q.base| (store .cse1 |c_func_to_recursive_line_0_to_51_0_#in~q.offset| .cse2)) |v_func_to_recursive_line_0_to_51_0_#in~q.base_BEFORE_CALL_34|) |v_func_to_recursive_line_0_to_51_0_#in~q.offset_BEFORE_CALL_34|)))))) (or (not (= (mod .cse3 2) 0)) .cse4) (or .cse4 (= .cse2 (* (select (select |c_#memory_int#6| |c_func_to_recursive_line_0_to_51_0_#in~y.base|) |c_func_to_recursive_line_0_to_51_0_#in~y.offset|) (select (select |c_#memory_int#5| |c_func_to_recursive_line_0_to_51_0_#in~x.base|) |c_func_to_recursive_line_0_to_51_0_#in~x.offset|)))) (or (= (select (select |c_old(#memory_int#1)| |c_func_to_recursive_line_0_to_51_0_#in~b.base|) |c_func_to_recursive_line_0_to_51_0_#in~b.offset|) 1) .cse4) (or (< .cse3 0) .cse4)))) is different from false [2024-09-20 20:04:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:47,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013249213] [2024-09-20 20:04:47,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:04:47,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129194598] [2024-09-20 20:04:47,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129194598] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:47,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:04:47,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-20 20:04:47,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055478362] [2024-09-20 20:04:47,882 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:47,883 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 20:04:47,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:47,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 20:04:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=937, Unknown=1, NotChecked=62, Total=1122 [2024-09-20 20:04:47,884 INFO L87 Difference]: Start difference. First operand 106 states and 184 transitions. Second operand has 28 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 25 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 20:04:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:54,955 INFO L93 Difference]: Finished difference Result 123 states and 224 transitions. [2024-09-20 20:04:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 20:04:54,957 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 25 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 63 [2024-09-20 20:04:54,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:54,959 INFO L225 Difference]: With dead ends: 123 [2024-09-20 20:04:54,959 INFO L226 Difference]: Without dead ends: 111 [2024-09-20 20:04:54,960 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=306, Invalid=2349, Unknown=1, NotChecked=100, Total=2756 [2024-09-20 20:04:54,960 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 52 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:54,960 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 192 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-09-20 20:04:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-20 20:04:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2024-09-20 20:04:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 77 states have internal predecessors, (83), 19 states have call successors, (19), 11 states have call predecessors, (19), 18 states have return successors, (89), 19 states have call predecessors, (89), 16 states have call successors, (89) [2024-09-20 20:04:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 191 transitions. [2024-09-20 20:04:55,032 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 191 transitions. Word has length 63 [2024-09-20 20:04:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:55,032 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 191 transitions. [2024-09-20 20:04:55,032 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 25 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 20:04:55,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 191 transitions. [2024-09-20 20:04:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 20:04:55,033 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:55,033 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2024-09-20 20:04:55,052 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-20 20:04:55,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 20:04:55,234 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:55,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:55,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1163113431, now seen corresponding path program 1 times [2024-09-20 20:04:55,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:55,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068071544] [2024-09-20 20:04:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:55,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:55,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:04:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:55,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:04:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:55,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:04:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:56,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:04:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:56,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:04:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:56,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:04:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:56,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:04:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:56,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:04:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 20:04:56,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:56,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068071544] [2024-09-20 20:04:56,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068071544] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:56,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248790717] [2024-09-20 20:04:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:56,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:56,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:04:56,382 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:04:56,383 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 20:04:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:56,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 20:04:56,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:04:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 20:04:56,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 20:04:56,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248790717] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:04:56,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:04:56,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2024-09-20 20:04:56,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146113494] [2024-09-20 20:04:56,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:04:56,671 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 20:04:56,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:56,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 20:04:56,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-09-20 20:04:56,672 INFO L87 Difference]: Start difference. First operand 108 states and 191 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 20:04:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:56,848 INFO L93 Difference]: Finished difference Result 177 states and 346 transitions. [2024-09-20 20:04:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 20:04:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2024-09-20 20:04:56,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:56,850 INFO L225 Difference]: With dead ends: 177 [2024-09-20 20:04:56,850 INFO L226 Difference]: Without dead ends: 106 [2024-09-20 20:04:56,851 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-09-20 20:04:56,852 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:56,852 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 144 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 20:04:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-20 20:04:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-09-20 20:04:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.144927536231884) internal successors, (79), 75 states have internal predecessors, (79), 18 states have call successors, (18), 11 states have call predecessors, (18), 18 states have return successors, (79), 19 states have call predecessors, (79), 15 states have call successors, (79) [2024-09-20 20:04:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 176 transitions. [2024-09-20 20:04:56,933 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 176 transitions. Word has length 65 [2024-09-20 20:04:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:56,934 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 176 transitions. [2024-09-20 20:04:56,934 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 20:04:56,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 176 transitions. [2024-09-20 20:04:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 20:04:56,935 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:56,935 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1] [2024-09-20 20:04:56,952 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 20:04:57,135 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 20:04:57,136 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:57,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:57,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2060506709, now seen corresponding path program 1 times [2024-09-20 20:04:57,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:57,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137150630] [2024-09-20 20:04:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:57,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:57,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:04:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:57,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:04:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:57,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:04:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:58,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:04:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:58,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:04:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:58,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:04:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:58,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:04:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:58,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:04:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-20 20:04:58,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:58,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137150630] [2024-09-20 20:04:58,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137150630] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:58,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721416697] [2024-09-20 20:04:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:58,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:58,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:04:58,432 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:04:58,433 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 20:04:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:58,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 20:04:58,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:04:58,723 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 [2024-09-20 20:04:58,727 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 [2024-09-20 20:04:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 20:04:58,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:04:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 20:04:59,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721416697] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:04:59,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:04:59,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 31 [2024-09-20 20:04:59,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034133570] [2024-09-20 20:04:59,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:59,538 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 20:04:59,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:59,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 20:04:59,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-09-20 20:04:59,539 INFO L87 Difference]: Start difference. First operand 106 states and 176 transitions. Second operand has 31 states, 24 states have (on average 2.75) internal successors, (66), 26 states have internal predecessors, (66), 12 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-20 20:05:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:01,731 INFO L93 Difference]: Finished difference Result 249 states and 575 transitions. [2024-09-20 20:05:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 20:05:01,732 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 2.75) internal successors, (66), 26 states have internal predecessors, (66), 12 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) Word has length 65 [2024-09-20 20:05:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:01,734 INFO L225 Difference]: With dead ends: 249 [2024-09-20 20:05:01,734 INFO L226 Difference]: Without dead ends: 178 [2024-09-20 20:05:01,736 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=365, Invalid=2827, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 20:05:01,737 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 94 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:01,737 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 396 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 20:05:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-20 20:05:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 145. [2024-09-20 20:05:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 103 states have internal predecessors, (109), 21 states have call successors, (21), 12 states have call predecessors, (21), 28 states have return successors, (151), 29 states have call predecessors, (151), 18 states have call successors, (151) [2024-09-20 20:05:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 281 transitions. [2024-09-20 20:05:01,879 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 281 transitions. Word has length 65 [2024-09-20 20:05:01,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:01,880 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 281 transitions. [2024-09-20 20:05:01,880 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 2.75) internal successors, (66), 26 states have internal predecessors, (66), 12 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-20 20:05:01,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 281 transitions. [2024-09-20 20:05:01,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 20:05:01,881 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:01,881 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:05:01,900 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 20:05:02,082 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:02,082 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:02,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:02,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1590925951, now seen corresponding path program 2 times [2024-09-20 20:05:02,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:02,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100888125] [2024-09-20 20:05:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:02,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:02,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:05:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:02,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:05:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:02,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:05:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:02,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:02,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:05:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:02,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:02,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:05:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:02,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 20:05:02,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:05:02,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100888125] [2024-09-20 20:05:02,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100888125] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:05:02,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322657842] [2024-09-20 20:05:02,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:05:02,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:02,883 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:02,884 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 20:05:03,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:05:03,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:05:03,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 20:05:03,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:03,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2024-09-20 20:05:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 20:05:03,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 20:05:03,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322657842] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:05:03,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:05:03,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 26 [2024-09-20 20:05:03,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412672288] [2024-09-20 20:05:03,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:05:03,778 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 20:05:03,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:05:03,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 20:05:03,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2024-09-20 20:05:03,779 INFO L87 Difference]: Start difference. First operand 145 states and 281 transitions. Second operand has 26 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 12 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-20 20:05:05,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:05,206 INFO L93 Difference]: Finished difference Result 263 states and 738 transitions. [2024-09-20 20:05:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 20:05:05,206 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 12 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) Word has length 63 [2024-09-20 20:05:05,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:05,209 INFO L225 Difference]: With dead ends: 263 [2024-09-20 20:05:05,209 INFO L226 Difference]: Without dead ends: 223 [2024-09-20 20:05:05,211 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=552, Invalid=2310, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 20:05:05,211 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 112 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:05,211 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 182 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 20:05:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-09-20 20:05:05,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2024-09-20 20:05:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 106 states have (on average 1.1320754716981132) internal successors, (120), 114 states have internal predecessors, (120), 21 states have call successors, (21), 12 states have call predecessors, (21), 39 states have return successors, (214), 40 states have call predecessors, (214), 18 states have call successors, (214) [2024-09-20 20:05:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 355 transitions. [2024-09-20 20:05:05,366 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 355 transitions. Word has length 63 [2024-09-20 20:05:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:05,367 INFO L474 AbstractCegarLoop]: Abstraction has 167 states and 355 transitions. [2024-09-20 20:05:05,367 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 12 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-20 20:05:05,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 355 transitions. [2024-09-20 20:05:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 20:05:05,368 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:05,369 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 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, 1, 1, 1] [2024-09-20 20:05:05,388 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-20 20:05:05,573 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-09-20 20:05:05,574 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:05,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:05,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1261108705, now seen corresponding path program 1 times [2024-09-20 20:05:05,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:05,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998349412] [2024-09-20 20:05:05,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:05,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:05:05,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263126899] [2024-09-20 20:05:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:05,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:05,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:05,608 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:05,611 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 20:05:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:05,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 20:05:05,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:05:06,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:06,172 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-09-20 20:05:06,173 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 16 treesize of output 15 [2024-09-20 20:05:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 20:05:06,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:05:06,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998349412] [2024-09-20 20:05:06,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:05:06,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263126899] [2024-09-20 20:05:06,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263126899] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:05:06,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 20:05:06,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2024-09-20 20:05:06,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945095413] [2024-09-20 20:05:06,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 20:05:06,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 20:05:06,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:05:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 20:05:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-09-20 20:05:06,252 INFO L87 Difference]: Start difference. First operand 167 states and 355 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-20 20:05:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:06,639 INFO L93 Difference]: Finished difference Result 175 states and 361 transitions. [2024-09-20 20:05:06,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 20:05:06,640 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2024-09-20 20:05:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:06,642 INFO L225 Difference]: With dead ends: 175 [2024-09-20 20:05:06,642 INFO L226 Difference]: Without dead ends: 159 [2024-09-20 20:05:06,642 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2024-09-20 20:05:06,643 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 15 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:06,643 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 113 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 309 Invalid, 5 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:05:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-20 20:05:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 139. [2024-09-20 20:05:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 98 states have internal predecessors, (103), 18 states have call successors, (18), 10 states have call predecessors, (18), 30 states have return successors, (161), 30 states have call predecessors, (161), 16 states have call successors, (161) [2024-09-20 20:05:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 282 transitions. [2024-09-20 20:05:06,782 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 282 transitions. Word has length 54 [2024-09-20 20:05:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:06,782 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 282 transitions. [2024-09-20 20:05:06,782 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-20 20:05:06,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 282 transitions. [2024-09-20 20:05:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 20:05:06,784 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:06,784 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2024-09-20 20:05:06,802 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-20 20:05:06,984 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-20 20:05:06,985 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:06,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash -682253735, now seen corresponding path program 1 times [2024-09-20 20:05:06,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:06,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393485014] [2024-09-20 20:05:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:06,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:07,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:05:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:07,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:05:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:07,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:05:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:07,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:07,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:05:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:07,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:07,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:05:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:07,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 20:05:07,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:05:07,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393485014] [2024-09-20 20:05:07,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393485014] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:05:07,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447923699] [2024-09-20 20:05:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:07,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:07,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:07,852 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:07,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 20:05:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:08,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 20:05:08,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:08,370 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 37 treesize of output 21 [2024-09-20 20:05:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 20:05:08,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 20:05:08,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447923699] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:05:08,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:05:08,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 29 [2024-09-20 20:05:08,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699267986] [2024-09-20 20:05:08,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:05:08,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 20:05:08,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:05:08,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 20:05:08,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2024-09-20 20:05:08,874 INFO L87 Difference]: Start difference. First operand 139 states and 282 transitions. Second operand has 29 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 9 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-20 20:05:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:10,036 INFO L93 Difference]: Finished difference Result 203 states and 524 transitions. [2024-09-20 20:05:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 20:05:10,036 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 9 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) Word has length 65 [2024-09-20 20:05:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:10,039 INFO L225 Difference]: With dead ends: 203 [2024-09-20 20:05:10,039 INFO L226 Difference]: Without dead ends: 181 [2024-09-20 20:05:10,040 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=476, Invalid=1974, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 20:05:10,041 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 131 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:10,041 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 172 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 20:05:10,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-20 20:05:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 147. [2024-09-20 20:05:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 102 states have internal predecessors, (107), 18 states have call successors, (18), 10 states have call predecessors, (18), 34 states have return successors, (185), 34 states have call predecessors, (185), 16 states have call successors, (185) [2024-09-20 20:05:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 310 transitions. [2024-09-20 20:05:10,163 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 310 transitions. Word has length 65 [2024-09-20 20:05:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:10,163 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 310 transitions. [2024-09-20 20:05:10,163 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 9 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-20 20:05:10,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 310 transitions. [2024-09-20 20:05:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-20 20:05:10,165 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:10,165 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2024-09-20 20:05:10,183 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-20 20:05:10,365 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-20 20:05:10,366 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:10,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:10,366 INFO L85 PathProgramCache]: Analyzing trace with hash -315216678, now seen corresponding path program 1 times [2024-09-20 20:05:10,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:10,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988876580] [2024-09-20 20:05:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:10,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:11,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:05:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:11,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:05:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:11,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:05:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:11,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:11,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 20:05:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:12,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:12,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:05:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:12,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:12,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:05:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:12,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-20 20:05:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:05:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988876580] [2024-09-20 20:05:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988876580] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:05:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511726081] [2024-09-20 20:05:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:12,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:12,561 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:12,563 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 20:05:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:12,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-20 20:05:12,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:12,849 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 [2024-09-20 20:05:12,850 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 [2024-09-20 20:05:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 20:05:13,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-20 20:05:14,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511726081] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:05:14,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:05:14,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 41 [2024-09-20 20:05:14,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322244937] [2024-09-20 20:05:14,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:05:14,447 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-20 20:05:14,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:05:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-20 20:05:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 20:05:14,449 INFO L87 Difference]: Start difference. First operand 147 states and 310 transitions. Second operand has 41 states, 31 states have (on average 2.806451612903226) internal successors, (87), 35 states have internal predecessors, (87), 17 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (20), 13 states have call predecessors, (20), 16 states have call successors, (20) [2024-09-20 20:05:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:17,900 INFO L93 Difference]: Finished difference Result 267 states and 730 transitions. [2024-09-20 20:05:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-20 20:05:17,901 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 31 states have (on average 2.806451612903226) internal successors, (87), 35 states have internal predecessors, (87), 17 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (20), 13 states have call predecessors, (20), 16 states have call successors, (20) Word has length 80 [2024-09-20 20:05:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:17,903 INFO L225 Difference]: With dead ends: 267 [2024-09-20 20:05:17,903 INFO L226 Difference]: Without dead ends: 235 [2024-09-20 20:05:17,905 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=706, Invalid=5614, Unknown=0, NotChecked=0, Total=6320 [2024-09-20 20:05:17,906 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 162 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:17,906 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 368 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 20:05:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-20 20:05:18,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 167. [2024-09-20 20:05:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 104 states have (on average 1.125) internal successors, (117), 112 states have internal predecessors, (117), 18 states have call successors, (18), 10 states have call predecessors, (18), 44 states have return successors, (233), 44 states have call predecessors, (233), 16 states have call successors, (233) [2024-09-20 20:05:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 368 transitions. [2024-09-20 20:05:18,051 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 368 transitions. Word has length 80 [2024-09-20 20:05:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:18,051 INFO L474 AbstractCegarLoop]: Abstraction has 167 states and 368 transitions. [2024-09-20 20:05:18,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 31 states have (on average 2.806451612903226) internal successors, (87), 35 states have internal predecessors, (87), 17 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (20), 13 states have call predecessors, (20), 16 states have call successors, (20) [2024-09-20 20:05:18,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 368 transitions. [2024-09-20 20:05:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-20 20:05:18,053 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:18,053 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:05:18,071 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-20 20:05:18,253 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:18,254 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:18,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:18,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2043242040, now seen corresponding path program 1 times [2024-09-20 20:05:18,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:18,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522583747] [2024-09-20 20:05:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:18,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:19,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:05:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:19,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:05:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:19,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:05:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:19,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:19,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:05:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:20,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:20,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:05:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:20,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:20,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:05:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:20,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-20 20:05:20,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:05:20,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522583747] [2024-09-20 20:05:20,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522583747] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:05:20,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427790988] [2024-09-20 20:05:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:20,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:20,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:20,474 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:20,475 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 20:05:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:20,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 20:05:20,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:20,785 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 19 treesize of output 11 [2024-09-20 20:05:20,788 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 [2024-09-20 20:05:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 20:05:21,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-20 20:05:22,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427790988] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:05:22,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:05:22,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 37 [2024-09-20 20:05:22,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60136046] [2024-09-20 20:05:22,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:05:22,030 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 20:05:22,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:05:22,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 20:05:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 20:05:22,031 INFO L87 Difference]: Start difference. First operand 167 states and 368 transitions. Second operand has 37 states, 27 states have (on average 3.074074074074074) internal successors, (83), 32 states have internal predecessors, (83), 16 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (18), 11 states have call predecessors, (18), 15 states have call successors, (18) [2024-09-20 20:05:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:25,928 INFO L93 Difference]: Finished difference Result 536 states and 1534 transitions. [2024-09-20 20:05:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-20 20:05:25,929 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 27 states have (on average 3.074074074074074) internal successors, (83), 32 states have internal predecessors, (83), 16 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (18), 11 states have call predecessors, (18), 15 states have call successors, (18) Word has length 84 [2024-09-20 20:05:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:25,933 INFO L225 Difference]: With dead ends: 536 [2024-09-20 20:05:25,933 INFO L226 Difference]: Without dead ends: 386 [2024-09-20 20:05:25,938 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1966 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1080, Invalid=7110, Unknown=0, NotChecked=0, Total=8190 [2024-09-20 20:05:25,939 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 262 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:25,939 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 523 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-20 20:05:25,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2024-09-20 20:05:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 249. [2024-09-20 20:05:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 164 states have (on average 1.146341463414634) internal successors, (188), 180 states have internal predecessors, (188), 29 states have call successors, (29), 13 states have call predecessors, (29), 55 states have return successors, (248), 55 states have call predecessors, (248), 27 states have call successors, (248) [2024-09-20 20:05:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 465 transitions. [2024-09-20 20:05:26,226 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 465 transitions. Word has length 84 [2024-09-20 20:05:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:26,226 INFO L474 AbstractCegarLoop]: Abstraction has 249 states and 465 transitions. [2024-09-20 20:05:26,227 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 27 states have (on average 3.074074074074074) internal successors, (83), 32 states have internal predecessors, (83), 16 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (18), 11 states have call predecessors, (18), 15 states have call successors, (18) [2024-09-20 20:05:26,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 465 transitions. [2024-09-20 20:05:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 20:05:26,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:26,229 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:05:26,246 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-20 20:05:26,429 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:26,430 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:26,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1758475267, now seen corresponding path program 2 times [2024-09-20 20:05:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:26,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673737286] [2024-09-20 20:05:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:26,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:05:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:26,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:05:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:26,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:05:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:27,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:27,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:05:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:27,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:27,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:05:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:27,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 20:05:27,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:05:27,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673737286] [2024-09-20 20:05:27,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673737286] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:05:27,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721881659] [2024-09-20 20:05:27,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:05:27,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:27,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:27,504 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:27,505 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 20:05:27,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:05:27,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:05:27,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 20:05:27,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:27,798 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 11 [2024-09-20 20:05:27,800 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 15 treesize of output 1 [2024-09-20 20:05:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-20 20:05:28,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 20:05:28,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721881659] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:05:28,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:05:28,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 12] total 26 [2024-09-20 20:05:28,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916986330] [2024-09-20 20:05:28,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:05:28,510 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 20:05:28,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:05:28,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 20:05:28,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-09-20 20:05:28,511 INFO L87 Difference]: Start difference. First operand 249 states and 465 transitions. Second operand has 26 states, 20 states have (on average 3.85) internal successors, (77), 22 states have internal predecessors, (77), 11 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-20 20:05:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:29,524 INFO L93 Difference]: Finished difference Result 379 states and 812 transitions. [2024-09-20 20:05:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 20:05:29,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 3.85) internal successors, (77), 22 states have internal predecessors, (77), 11 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) Word has length 67 [2024-09-20 20:05:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:29,528 INFO L225 Difference]: With dead ends: 379 [2024-09-20 20:05:29,528 INFO L226 Difference]: Without dead ends: 319 [2024-09-20 20:05:29,530 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2024-09-20 20:05:29,530 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 93 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:29,530 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 203 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 20:05:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-09-20 20:05:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 255. [2024-09-20 20:05:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 183 states have internal predecessors, (191), 29 states have call successors, (29), 13 states have call predecessors, (29), 58 states have return successors, (246), 58 states have call predecessors, (246), 27 states have call successors, (246) [2024-09-20 20:05:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 466 transitions. [2024-09-20 20:05:29,818 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 466 transitions. Word has length 67 [2024-09-20 20:05:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:29,818 INFO L474 AbstractCegarLoop]: Abstraction has 255 states and 466 transitions. [2024-09-20 20:05:29,819 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 3.85) internal successors, (77), 22 states have internal predecessors, (77), 11 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-20 20:05:29,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 466 transitions. [2024-09-20 20:05:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 20:05:29,820 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:29,820 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2024-09-20 20:05:29,833 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-20 20:05:30,020 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-20 20:05:30,020 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:30,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash -915756227, now seen corresponding path program 1 times [2024-09-20 20:05:30,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:30,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49960417] [2024-09-20 20:05:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:30,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:30,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:05:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:30,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:05:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:30,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:05:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:30,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:30,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:05:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:30,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:30,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 20:05:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:30,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 20:05:30,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:05:30,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49960417] [2024-09-20 20:05:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49960417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:05:30,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633631123] [2024-09-20 20:05:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:30,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:30,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:30,996 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:30,997 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-20 20:05:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:31,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 20:05:31,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:31,324 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 28 treesize of output 16 [2024-09-20 20:05:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-20 20:05:31,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 20:05:32,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633631123] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:05:32,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:05:32,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 30 [2024-09-20 20:05:32,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550783982] [2024-09-20 20:05:32,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:05:32,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 20:05:32,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:05:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 20:05:32,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-09-20 20:05:32,204 INFO L87 Difference]: Start difference. First operand 255 states and 466 transitions. Second operand has 30 states, 25 states have (on average 3.04) internal successors, (76), 26 states have internal predecessors, (76), 11 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-20 20:05:33,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:33,175 INFO L93 Difference]: Finished difference Result 301 states and 567 transitions. [2024-09-20 20:05:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 20:05:33,176 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 3.04) internal successors, (76), 26 states have internal predecessors, (76), 11 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) Word has length 67 [2024-09-20 20:05:33,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:33,179 INFO L225 Difference]: With dead ends: 301 [2024-09-20 20:05:33,179 INFO L226 Difference]: Without dead ends: 259 [2024-09-20 20:05:33,180 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=382, Invalid=1510, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 20:05:33,181 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 122 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:33,181 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 195 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 20:05:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-20 20:05:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 245. [2024-09-20 20:05:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 162 states have (on average 1.1419753086419753) internal successors, (185), 177 states have internal predecessors, (185), 29 states have call successors, (29), 13 states have call predecessors, (29), 53 states have return successors, (225), 54 states have call predecessors, (225), 27 states have call successors, (225) [2024-09-20 20:05:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 439 transitions. [2024-09-20 20:05:33,422 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 439 transitions. Word has length 67 [2024-09-20 20:05:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:33,423 INFO L474 AbstractCegarLoop]: Abstraction has 245 states and 439 transitions. [2024-09-20 20:05:33,423 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 3.04) internal successors, (76), 26 states have internal predecessors, (76), 11 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-20 20:05:33,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 439 transitions. [2024-09-20 20:05:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 20:05:33,424 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:33,424 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2024-09-20 20:05:33,439 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-20 20:05:33,624 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-20 20:05:33,624 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:33,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:33,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1813149505, now seen corresponding path program 1 times [2024-09-20 20:05:33,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:33,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320058909] [2024-09-20 20:05:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:33,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:05:33,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999951457] [2024-09-20 20:05:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:33,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:33,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:33,659 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:33,661 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-20 20:05:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:34,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 152 conjuncts are in the unsatisfiable core [2024-09-20 20:05:34,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:34,080 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 [2024-09-20 20:05:34,081 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 [2024-09-20 20:05:34,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:05:34,088 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 [2024-09-20 20:05:34,092 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 [2024-09-20 20:05:34,098 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 [2024-09-20 20:05:34,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:05:34,124 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 11 treesize of output 7 [2024-09-20 20:05:35,965 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 48 treesize of output 32 [2024-09-20 20:05:35,971 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 25 treesize of output 17 [2024-09-20 20:05:36,022 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 24 [2024-09-20 20:05:36,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:05:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-20 20:05:36,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:39,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:05:39,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320058909] [2024-09-20 20:05:39,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:05:39,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999951457] [2024-09-20 20:05:39,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999951457] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:05:39,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:05:39,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 20:05:39,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858248003] [2024-09-20 20:05:39,048 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:05:39,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 20:05:39,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:05:39,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 20:05:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-09-20 20:05:39,049 INFO L87 Difference]: Start difference. First operand 245 states and 439 transitions. Second operand has 24 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 20:05:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:41,442 INFO L93 Difference]: Finished difference Result 305 states and 602 transitions. [2024-09-20 20:05:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 20:05:41,442 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 67 [2024-09-20 20:05:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:41,444 INFO L225 Difference]: With dead ends: 305 [2024-09-20 20:05:41,444 INFO L226 Difference]: Without dead ends: 249 [2024-09-20 20:05:41,445 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 20:05:41,446 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:41,446 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 213 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 20:05:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-09-20 20:05:41,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2024-09-20 20:05:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 163 states have (on average 1.1411042944785277) internal successors, (186), 178 states have internal predecessors, (186), 29 states have call successors, (29), 13 states have call predecessors, (29), 54 states have return successors, (231), 55 states have call predecessors, (231), 27 states have call successors, (231) [2024-09-20 20:05:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 446 transitions. [2024-09-20 20:05:41,708 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 446 transitions. Word has length 67 [2024-09-20 20:05:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:41,708 INFO L474 AbstractCegarLoop]: Abstraction has 247 states and 446 transitions. [2024-09-20 20:05:41,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 20:05:41,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 446 transitions. [2024-09-20 20:05:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-20 20:05:41,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:41,709 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:05:41,723 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-20 20:05:41,909 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-20 20:05:41,910 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:41,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:41,910 INFO L85 PathProgramCache]: Analyzing trace with hash 964392132, now seen corresponding path program 1 times [2024-09-20 20:05:41,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:41,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891993852] [2024-09-20 20:05:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:41,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:05:41,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838807220] [2024-09-20 20:05:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:41,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:41,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:41,950 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:41,951 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-20 20:05:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:42,441 WARN L260 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 311 conjuncts are in the unsatisfiable core [2024-09-20 20:05:42,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:42,451 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 [2024-09-20 20:05:42,452 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 [2024-09-20 20:05:42,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:05:42,459 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 [2024-09-20 20:05:42,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:05:42,469 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 [2024-09-20 20:05:42,484 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 11 treesize of output 7 [2024-09-20 20:05:42,490 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 11 treesize of output 7