./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 e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_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 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:23:28,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:23:28,748 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:23:28,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:23:28,756 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:23:28,794 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:23:28,794 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:23:28,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:23:28,796 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:23:28,798 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:23:28,800 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:23:28,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:23:28,800 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:23:28,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:23:28,801 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:23:28,801 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:23:28,801 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:23:28,802 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:23:28,802 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:23:28,802 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:23:28,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:23:28,803 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:23:28,803 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:23:28,803 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:23:28,804 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:23:28,804 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:23:28,804 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:23:28,804 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:23:28,805 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:23:28,805 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:23:28,805 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:23:28,805 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:23:28,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:23:28,806 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:23:28,806 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:23:28,807 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:23:28,807 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:23:28,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:23:28,808 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:23:28,808 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:23:28,808 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:23:28,809 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:23:28,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96f1211cbeeae798f0ae4041c6e80d5023e7b1c38257b583d7afbb4e6848597b Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:23:29,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:23:29,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:23:29,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:23:29,083 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:23:29,083 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:23:29,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2024-10-15 15:23:30,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:23:30,682 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:23:30,682 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2024-10-15 15:23:30,690 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5a8ac5be7/a00a2afad3f3435c9d6626ad4e55de5f/FLAGbc4e22c2b [2024-10-15 15:23:30,701 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5a8ac5be7/a00a2afad3f3435c9d6626ad4e55de5f [2024-10-15 15:23:30,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:23:30,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:23:30,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:23:30,706 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:23:30,711 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:23:30,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:23:30" (1/1) ... [2024-10-15 15:23:30,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b007218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:30, skipping insertion in model container [2024-10-15 15:23:30,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:23:30" (1/1) ... [2024-10-15 15:23:30,735 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:23:30,913 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] [2024-10-15 15:23:30,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:23:30,950 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:23:30,962 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] [2024-10-15 15:23:30,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:23:31,002 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:23:31,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31 WrapperNode [2024-10-15 15:23:31,003 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:23:31,004 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:23:31,004 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:23:31,004 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:23:31,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,024 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,034 INFO L138 Inliner]: procedures = 16, calls = 86, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:23:31,035 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:23:31,036 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:23:31,036 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:23:31,036 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:23:31,047 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,051 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,079 INFO L175 MemorySlicer]: Split 57 memory accesses to 7 slices as follows [2, 9, 15, 15, 4, 5, 7]. 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, 4, 4, 1, 1, 2]. [2024-10-15 15:23:31,079 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,079 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,087 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,089 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,090 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,092 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,095 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:23:31,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:23:31,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:23:31,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:23:31,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (1/1) ... [2024-10-15 15:23:31,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:23:31,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:31,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-15 15:23:31,138 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-15 15:23:31,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:23:31,185 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 15:23:31,185 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 15:23:31,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:23:31,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:23:31,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:23:31,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:23:31,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-15 15:23:31,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-15 15:23:31,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-15 15:23:31,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-15 15:23:31,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-15 15:23:31,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 15:23:31,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 15:23:31,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 15:23:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-15 15:23:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-15 15:23:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-15 15:23:31,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-15 15:23:31,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-15 15:23:31,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:23:31,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:23:31,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:23:31,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:23:31,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 15:23:31,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 15:23:31,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-15 15:23:31,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-15 15:23:31,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-15 15:23:31,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-15 15:23:31,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-15 15:23:31,193 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_51_0 [2024-10-15 15:23:31,193 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_51_0 [2024-10-15 15:23:31,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 15:23:31,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 15:23:31,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 15:23:31,314 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:23:31,318 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:23:31,608 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-10-15 15:23:31,608 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:23:31,628 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:23:31,628 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-15 15:23:31,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:23:31 BoogieIcfgContainer [2024-10-15 15:23:31,629 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:23:31,633 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:23:31,634 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:23:31,637 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:23:31,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:23:30" (1/3) ... [2024-10-15 15:23:31,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f2b8b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:23:31, skipping insertion in model container [2024-10-15 15:23:31,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:31" (2/3) ... [2024-10-15 15:23:31,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f2b8b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:23:31, skipping insertion in model container [2024-10-15 15:23:31,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:23:31" (3/3) ... [2024-10-15 15:23:31,642 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_prod4br-ll.c [2024-10-15 15:23:31,663 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:23:31,663 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:23:31,708 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:23:31,715 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2934d08a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:23:31,715 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:23:31,719 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) [2024-10-15 15:23:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-15 15:23:31,725 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:31,725 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:31,726 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:31,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:31,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1334266921, now seen corresponding path program 1 times [2024-10-15 15:23:31,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:31,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224489639] [2024-10-15 15:23:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:31,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:31,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:23:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:31,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:23:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:31,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:31,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224489639] [2024-10-15 15:23:31,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224489639] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:23:31,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:23:31,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 15:23:31,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500737129] [2024-10-15 15:23:31,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:23:31,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 15:23:31,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:32,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 15:23:32,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 15:23:32,008 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) [2024-10-15 15:23:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:32,041 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2024-10-15 15:23:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 15:23:32,044 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 [2024-10-15 15:23:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:32,052 INFO L225 Difference]: With dead ends: 74 [2024-10-15 15:23:32,053 INFO L226 Difference]: Without dead ends: 37 [2024-10-15 15:23:32,057 INFO L431 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 [2024-10-15 15:23:32,062 INFO L432 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 [2024-10-15 15:23:32,064 INFO L433 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] [2024-10-15 15:23:32,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-15 15:23:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-15 15:23:32,105 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) [2024-10-15 15:23:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2024-10-15 15:23:32,110 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 18 [2024-10-15 15:23:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:32,111 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2024-10-15 15:23:32,112 INFO L472 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) [2024-10-15 15:23:32,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2024-10-15 15:23:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-15 15:23:32,114 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:32,114 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:32,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 15:23:32,115 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:32,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash -633202343, now seen corresponding path program 1 times [2024-10-15 15:23:32,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:32,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788267608] [2024-10-15 15:23:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:32,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:23:32,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514870603] [2024-10-15 15:23:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:32,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:32,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:32,222 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:23:32,224 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:23:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:32,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-10-15 15:23:32,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:32,492 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 1 [2024-10-15 15:23:32,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:32,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:32,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:32,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:32,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:32,748 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 19 treesize of output 11 [2024-10-15 15:23:32,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:23:32,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:23:32,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:23:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:32,838 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:23:32,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:32,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788267608] [2024-10-15 15:23:32,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:23:32,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514870603] [2024-10-15 15:23:32,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514870603] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:23:32,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:23:32,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:23:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651089066] [2024-10-15 15:23:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:23:32,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:23:32,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:23:32,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:23:32,845 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) [2024-10-15 15:23:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:33,165 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-10-15 15:23:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:23:33,165 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 [2024-10-15 15:23:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:33,168 INFO L225 Difference]: With dead ends: 58 [2024-10-15 15:23:33,169 INFO L226 Difference]: Without dead ends: 56 [2024-10-15 15:23:33,169 INFO L431 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 [2024-10-15 15:23:33,170 INFO L432 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 [2024-10-15 15:23:33,171 INFO L433 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] [2024-10-15 15:23:33,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-15 15:23:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2024-10-15 15:23:33,191 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) [2024-10-15 15:23:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2024-10-15 15:23:33,193 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 18 [2024-10-15 15:23:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:33,194 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2024-10-15 15:23:33,194 INFO L472 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) [2024-10-15 15:23:33,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2024-10-15 15:23:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-15 15:23:33,195 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:33,195 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:33,214 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 15:23:33,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:33,396 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:33,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash 261423925, now seen corresponding path program 1 times [2024-10-15 15:23:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:33,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921825929] [2024-10-15 15:23:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:33,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:23:33,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725137584] [2024-10-15 15:23:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:33,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:33,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:33,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:23:33,465 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:23:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:33,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-15 15:23:33,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:33,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:33,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:33,622 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 [2024-10-15 15:23:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:33,825 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:23:33,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:33,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921825929] [2024-10-15 15:23:33,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:23:33,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725137584] [2024-10-15 15:23:33,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725137584] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:23:33,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:23:33,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-15 15:23:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883834050] [2024-10-15 15:23:33,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:23:33,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 15:23:33,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 15:23:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:23:33,830 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) [2024-10-15 15:23:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:34,167 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2024-10-15 15:23:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:23:34,168 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 [2024-10-15 15:23:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:34,170 INFO L225 Difference]: With dead ends: 90 [2024-10-15 15:23:34,170 INFO L226 Difference]: Without dead ends: 65 [2024-10-15 15:23:34,171 INFO L431 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 [2024-10-15 15:23:34,172 INFO L432 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 [2024-10-15 15:23:34,172 INFO L433 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] [2024-10-15 15:23:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-15 15:23:34,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2024-10-15 15:23:34,186 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) [2024-10-15 15:23:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2024-10-15 15:23:34,187 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 29 [2024-10-15 15:23:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:34,187 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2024-10-15 15:23:34,188 INFO L472 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) [2024-10-15 15:23:34,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2024-10-15 15:23:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-15 15:23:34,189 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:34,189 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:34,206 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 15:23:34,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:34,394 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:34,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash -418634445, now seen corresponding path program 1 times [2024-10-15 15:23:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:34,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645256831] [2024-10-15 15:23:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:34,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:34,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:23:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:34,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:23:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:34,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:23:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:35,083 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:23:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:35,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:35,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645256831] [2024-10-15 15:23:35,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645256831] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:23:35,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:23:35,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-15 15:23:35,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814100538] [2024-10-15 15:23:35,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:23:35,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 15:23:35,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:35,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 15:23:35,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:23:35,092 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) [2024-10-15 15:23:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:35,522 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2024-10-15 15:23:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 15:23:35,522 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 [2024-10-15 15:23:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:35,527 INFO L225 Difference]: With dead ends: 81 [2024-10-15 15:23:35,527 INFO L226 Difference]: Without dead ends: 69 [2024-10-15 15:23:35,528 INFO L431 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 [2024-10-15 15:23:35,528 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:23:35,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 108 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:23:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-15 15:23:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2024-10-15 15:23:35,551 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) [2024-10-15 15:23:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-10-15 15:23:35,553 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 29 [2024-10-15 15:23:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:35,553 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-10-15 15:23:35,553 INFO L472 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) [2024-10-15 15:23:35,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-10-15 15:23:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-15 15:23:35,554 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:35,555 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:35,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-15 15:23:35,555 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:35,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash 661556601, now seen corresponding path program 1 times [2024-10-15 15:23:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:35,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176843602] [2024-10-15 15:23:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:35,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:23:35,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544557751] [2024-10-15 15:23:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:35,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:35,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:35,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:23:35,647 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 15:23:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:35,782 WARN L253 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-10-15 15:23:35,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:35,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:35,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:35,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:35,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:35,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:35,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:36,322 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 [2024-10-15 15:23:36,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:23:36,344 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 [2024-10-15 15:23:36,517 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 [2024-10-15 15:23:36,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-15 15:23:36,539 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 [2024-10-15 15:23:36,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-15 15:23:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:36,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:23:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:38,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:38,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176843602] [2024-10-15 15:23:38,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:23:38,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544557751] [2024-10-15 15:23:38,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544557751] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:23:38,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:23:38,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-10-15 15:23:38,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235477329] [2024-10-15 15:23:38,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:23:38,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 15:23:38,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:38,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 15:23:38,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-10-15 15:23:38,526 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) [2024-10-15 15:23:46,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:46,276 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2024-10-15 15:23:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 15:23:46,276 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 [2024-10-15 15:23:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:46,278 INFO L225 Difference]: With dead ends: 113 [2024-10-15 15:23:46,278 INFO L226 Difference]: Without dead ends: 109 [2024-10-15 15:23:46,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 15:23:46,280 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 214 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:23:46,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 243 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-10-15 15:23:46,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-15 15:23:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2024-10-15 15:23:46,316 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) [2024-10-15 15:23:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2024-10-15 15:23:46,318 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 31 [2024-10-15 15:23:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:46,318 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2024-10-15 15:23:46,318 INFO L472 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) [2024-10-15 15:23:46,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:46,319 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2024-10-15 15:23:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-15 15:23:46,320 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:46,320 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:46,338 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 15:23:46,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:46,521 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:46,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:46,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1560377938, now seen corresponding path program 1 times [2024-10-15 15:23:46,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:46,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140362158] [2024-10-15 15:23:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:46,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:23:46,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189531069] [2024-10-15 15:23:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:46,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:46,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:46,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:23:46,547 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 15:23:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:46,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-15 15:23:46,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:46,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:46,651 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 [2024-10-15 15:23:46,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:46,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:23:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:23:46,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:46,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140362158] [2024-10-15 15:23:46,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:23:46,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189531069] [2024-10-15 15:23:46,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189531069] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 15:23:46,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:23:46,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 14 [2024-10-15 15:23:46,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227878910] [2024-10-15 15:23:46,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:23:46,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 15:23:46,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:46,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 15:23:46,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-10-15 15:23:46,928 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) [2024-10-15 15:23:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:47,092 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2024-10-15 15:23:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:23:47,093 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 [2024-10-15 15:23:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:47,094 INFO L225 Difference]: With dead ends: 91 [2024-10-15 15:23:47,094 INFO L226 Difference]: Without dead ends: 76 [2024-10-15 15:23:47,095 INFO L431 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 [2024-10-15 15:23:47,096 INFO L432 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 [2024-10-15 15:23:47,096 INFO L433 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] [2024-10-15 15:23:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-15 15:23:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2024-10-15 15:23:47,126 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) [2024-10-15 15:23:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2024-10-15 15:23:47,127 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 35 [2024-10-15 15:23:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:47,128 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2024-10-15 15:23:47,128 INFO L472 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) [2024-10-15 15:23:47,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2024-10-15 15:23:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-15 15:23:47,135 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:47,135 INFO L215 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] [2024-10-15 15:23:47,150 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 15:23:47,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:47,336 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:47,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:47,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1573056070, now seen corresponding path program 1 times [2024-10-15 15:23:47,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:47,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705331850] [2024-10-15 15:23:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:47,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:48,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:23:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:48,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:23:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:48,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:23:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:48,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:23:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:48,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 15:23:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:48,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:23:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-15 15:23:48,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:48,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705331850] [2024-10-15 15:23:48,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705331850] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:23:48,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370516920] [2024-10-15 15:23:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:48,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:48,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:23:48,635 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 15:23:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:48,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-15 15:23:48,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:48,912 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 [2024-10-15 15:23:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:23:49,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:23:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:23:49,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370516920] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:23:49,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:23:49,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2024-10-15 15:23:49,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559914149] [2024-10-15 15:23:49,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:23:49,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 15:23:49,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 15:23:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-10-15 15:23:49,264 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 17 states have internal predecessors, (43), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-15 15:23:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:49,852 INFO L93 Difference]: Finished difference Result 114 states and 216 transitions. [2024-10-15 15:23:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 15:23:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 17 states have internal predecessors, (43), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 44 [2024-10-15 15:23:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:49,855 INFO L225 Difference]: With dead ends: 114 [2024-10-15 15:23:49,855 INFO L226 Difference]: Without dead ends: 97 [2024-10-15 15:23:49,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:23:49,859 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 15:23:49,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 97 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 15:23:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-15 15:23:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2024-10-15 15:23:49,930 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) [2024-10-15 15:23:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2024-10-15 15:23:49,931 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 44 [2024-10-15 15:23:49,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:49,931 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2024-10-15 15:23:49,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 17 states have internal predecessors, (43), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-15 15:23:49,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2024-10-15 15:23:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-15 15:23:49,937 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:49,937 INFO L215 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] [2024-10-15 15:23:49,957 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 15:23:50,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-15 15:23:50,139 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:50,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:50,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2020846648, now seen corresponding path program 1 times [2024-10-15 15:23:50,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:50,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368016918] [2024-10-15 15:23:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:50,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:50,655 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:23:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:50,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:23:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:50,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:23:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:50,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:23:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:50,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 15:23:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:51,028 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:23:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-15 15:23:51,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:51,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368016918] [2024-10-15 15:23:51,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368016918] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:23:51,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125219118] [2024-10-15 15:23:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:51,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:51,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:51,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:23:51,037 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 15:23:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:51,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-15 15:23:51,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:51,284 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 [2024-10-15 15:23:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:23:51,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:23:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:23:51,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125219118] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:23:51,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:23:51,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 24 [2024-10-15 15:23:51,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848271864] [2024-10-15 15:23:51,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:23:51,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 15:23:51,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 15:23:51,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-10-15 15:23:51,644 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-15 15:23:52,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:52,425 INFO L93 Difference]: Finished difference Result 102 states and 160 transitions. [2024-10-15 15:23:52,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 15:23:52,426 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 44 [2024-10-15 15:23:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:52,427 INFO L225 Difference]: With dead ends: 102 [2024-10-15 15:23:52,427 INFO L226 Difference]: Without dead ends: 84 [2024-10-15 15:23:52,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2024-10-15 15:23:52,429 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 15:23:52,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 147 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 15:23:52,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-15 15:23:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2024-10-15 15:23:52,491 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, (16), 8 states have call predecessors, (16), 12 states have call successors, (16) [2024-10-15 15:23:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2024-10-15 15:23:52,493 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 44 [2024-10-15 15:23:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:52,494 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2024-10-15 15:23:52,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-15 15:23:52,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2024-10-15 15:23:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:23:52,499 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:52,500 INFO L215 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] [2024-10-15 15:23:52,517 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 15:23:52,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:52,701 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:52,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash 264265128, now seen corresponding path program 1 times [2024-10-15 15:23:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600631976] [2024-10-15 15:23:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:52,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:23:52,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548979668] [2024-10-15 15:23:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:52,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:52,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:52,741 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:23:52,742 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 15:23:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:52,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-10-15 15:23:52,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:52,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:52,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:52,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:52,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:52,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:52,981 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 [2024-10-15 15:23:52,989 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 [2024-10-15 15:23:54,259 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 [2024-10-15 15:23:54,262 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 [2024-10-15 15:23:54,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:23:54,309 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 [2024-10-15 15:23:54,313 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 [2024-10-15 15:23:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:23:54,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:23:55,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:55,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600631976] [2024-10-15 15:23:55,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:23:55,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548979668] [2024-10-15 15:23:55,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548979668] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:23:55,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:23:55,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-10-15 15:23:55,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613940382] [2024-10-15 15:23:55,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:23:55,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 15:23:55,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 15:23:55,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2024-10-15 15:23:55,735 INFO L87 Difference]: Start difference. First operand 73 states and 96 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) [2024-10-15 15:23:59,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:01,466 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2024-10-15 15:24:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 15:24:01,467 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 [2024-10-15 15:24:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:01,469 INFO L225 Difference]: With dead ends: 94 [2024-10-15 15:24:01,469 INFO L226 Difference]: Without dead ends: 92 [2024-10-15 15:24:01,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 15:24:01,471 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-10-15 15:24:01,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 215 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 760 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-10-15 15:24:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-15 15:24:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2024-10-15 15:24:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 64 states have internal predecessors, (77), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (27), 10 states have call predecessors, (27), 14 states have call successors, (27) [2024-10-15 15:24:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 120 transitions. [2024-10-15 15:24:01,519 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 120 transitions. Word has length 48 [2024-10-15 15:24:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:01,519 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 120 transitions. [2024-10-15 15:24:01,519 INFO L472 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) [2024-10-15 15:24:01,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 120 transitions. [2024-10-15 15:24:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 15:24:01,521 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:01,521 INFO L215 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] [2024-10-15 15:24:01,539 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 15:24:01,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:01,726 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:01,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1016093312, now seen corresponding path program 1 times [2024-10-15 15:24:01,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:01,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791247492] [2024-10-15 15:24:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:01,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:24:01,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5059961] [2024-10-15 15:24:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:01,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:01,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:24:01,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:24:01,752 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 15:24:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:01,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-10-15 15:24:01,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:24:01,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:24:01,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:24:01,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:24:01,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:24:01,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:24:01,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:24:01,996 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 [2024-10-15 15:24:02,003 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 [2024-10-15 15:24:15,410 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 [2024-10-15 15:24:15,416 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 [2024-10-15 15:24:15,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:24:15,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:24:15,486 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 29 treesize of output 25 [2024-10-15 15:24:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:24:15,554 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:24:17,037 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 67 treesize of output 59 [2024-10-15 15:24:17,042 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 51 [2024-10-15 15:24:17,047 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 51 treesize of output 43 [2024-10-15 15:24:17,056 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 39 [2024-10-15 15:24:34,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:34,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791247492] [2024-10-15 15:24:34,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:24:34,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5059961] [2024-10-15 15:24:34,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5059961] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:24:34,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:24:34,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-10-15 15:24:34,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613094102] [2024-10-15 15:24:34,325 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:24:34,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-15 15:24:34,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:34,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-15 15:24:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1179, Unknown=4, NotChecked=0, Total=1332 [2024-10-15 15:24:34,327 INFO L87 Difference]: Start difference. First operand 85 states and 120 transitions. Second operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 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) [2024-10-15 15:24:38,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:45,766 INFO L93 Difference]: Finished difference Result 100 states and 147 transitions. [2024-10-15 15:24:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 15:24:45,767 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 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 46 [2024-10-15 15:24:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:45,768 INFO L225 Difference]: With dead ends: 100 [2024-10-15 15:24:45,768 INFO L226 Difference]: Without dead ends: 98 [2024-10-15 15:24:45,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=289, Invalid=2256, Unknown=5, NotChecked=0, Total=2550 [2024-10-15 15:24:45,770 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:24:45,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 239 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1008 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2024-10-15 15:24:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-15 15:24:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2024-10-15 15:24:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 64 states have internal predecessors, (77), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (27), 10 states have call predecessors, (27), 14 states have call successors, (27) [2024-10-15 15:24:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 120 transitions. [2024-10-15 15:24:45,824 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 120 transitions. Word has length 46 [2024-10-15 15:24:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:45,824 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 120 transitions. [2024-10-15 15:24:45,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 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) [2024-10-15 15:24:45,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 120 transitions. [2024-10-15 15:24:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:24:45,826 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:45,826 INFO L215 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] [2024-10-15 15:24:45,845 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-15 15:24:46,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:46,031 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:46,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:46,031 INFO L85 PathProgramCache]: Analyzing trace with hash 130251622, now seen corresponding path program 1 times [2024-10-15 15:24:46,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:46,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693977834] [2024-10-15 15:24:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:46,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:46,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:24:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:46,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:24:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:46,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:24:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:46,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:24:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:46,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 15:24:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:46,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:24:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-15 15:24:46,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:46,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693977834] [2024-10-15 15:24:46,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693977834] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:24:46,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:24:46,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-15 15:24:46,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169247648] [2024-10-15 15:24:46,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:24:46,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 15:24:46,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:46,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 15:24:46,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-15 15:24:46,657 INFO L87 Difference]: Start difference. First operand 85 states and 120 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) [2024-10-15 15:24:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:47,081 INFO L93 Difference]: Finished difference Result 123 states and 252 transitions. [2024-10-15 15:24:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-15 15:24:47,082 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 [2024-10-15 15:24:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:47,084 INFO L225 Difference]: With dead ends: 123 [2024-10-15 15:24:47,085 INFO L226 Difference]: Without dead ends: 103 [2024-10-15 15:24:47,086 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-10-15 15:24:47,088 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 58 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:24:47,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 105 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:24:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-15 15:24:47,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2024-10-15 15:24:47,124 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, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2024-10-15 15:24:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 109 transitions. [2024-10-15 15:24:47,125 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 109 transitions. Word has length 48 [2024-10-15 15:24:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:47,125 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 109 transitions. [2024-10-15 15:24:47,126 INFO L472 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) [2024-10-15 15:24:47,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 109 transitions. [2024-10-15 15:24:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:24:47,127 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:47,127 INFO L215 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] [2024-10-15 15:24:47,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-15 15:24:47,127 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:47,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:47,128 INFO L85 PathProgramCache]: Analyzing trace with hash -921540890, now seen corresponding path program 1 times [2024-10-15 15:24:47,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:47,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843425539] [2024-10-15 15:24:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:47,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:24:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:47,162 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:24:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:47,171 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:24:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:47,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:24:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:47,195 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 15:24:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:47,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:24:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 15:24:47,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843425539] [2024-10-15 15:24:47,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843425539] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:24:47,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:24:47,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-15 15:24:47,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258193581] [2024-10-15 15:24:47,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:24:47,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-15 15:24:47,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:47,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-15 15:24:47,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-15 15:24:47,203 INFO L87 Difference]: Start difference. First operand 81 states and 109 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) [2024-10-15 15:24:47,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:47,328 INFO L93 Difference]: Finished difference Result 127 states and 184 transitions. [2024-10-15 15:24:47,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-15 15:24:47,328 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 [2024-10-15 15:24:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:47,330 INFO L225 Difference]: With dead ends: 127 [2024-10-15 15:24:47,330 INFO L226 Difference]: Without dead ends: 83 [2024-10-15 15:24:47,331 INFO L431 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 [2024-10-15 15:24:47,332 INFO L432 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 [2024-10-15 15:24:47,332 INFO L433 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] [2024-10-15 15:24:47,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-15 15:24:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-10-15 15:24:47,371 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, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2024-10-15 15:24:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2024-10-15 15:24:47,372 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 48 [2024-10-15 15:24:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:47,373 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2024-10-15 15:24:47,373 INFO L472 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) [2024-10-15 15:24:47,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2024-10-15 15:24:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:24:47,374 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:47,374 INFO L215 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] [2024-10-15 15:24:47,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-15 15:24:47,375 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:47,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:47,375 INFO L85 PathProgramCache]: Analyzing trace with hash -436799450, now seen corresponding path program 1 times [2024-10-15 15:24:47,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:47,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847240522] [2024-10-15 15:24:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:47,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:24:47,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490257007] [2024-10-15 15:24:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:47,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:47,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:24:47,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:24:47,416 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 15:24:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:47,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-10-15 15:24:47,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:24:47,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:24:47,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:24:47,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:24:47,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:24:47,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:24:47,676 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 [2024-10-15 15:24:47,683 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 [2024-10-15 15:24:49,207 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 [2024-10-15 15:24:49,210 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 [2024-10-15 15:24:49,254 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 [2024-10-15 15:24:49,256 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 [2024-10-15 15:24:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:24:49,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:24:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:50,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847240522] [2024-10-15 15:24:50,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:24:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490257007] [2024-10-15 15:24:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490257007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:24:50,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:24:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-10-15 15:24:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155254466] [2024-10-15 15:24:50,733 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:24:50,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 15:24:50,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 15:24:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:24:50,734 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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) [2024-10-15 15:24:54,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:56,264 INFO L93 Difference]: Finished difference Result 101 states and 147 transitions. [2024-10-15 15:24:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 15:24:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 [2024-10-15 15:24:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:56,266 INFO L225 Difference]: With dead ends: 101 [2024-10-15 15:24:56,266 INFO L226 Difference]: Without dead ends: 99 [2024-10-15 15:24:56,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 15:24:56,267 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:24:56,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 203 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 771 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2024-10-15 15:24:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-15 15:24:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2024-10-15 15:24:56,321 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, (26), 10 states have call predecessors, (26), 14 states have call successors, (26) [2024-10-15 15:24:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2024-10-15 15:24:56,322 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 48 [2024-10-15 15:24:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:56,323 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2024-10-15 15:24:56,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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) [2024-10-15 15:24:56,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2024-10-15 15:24:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:24:56,324 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:56,325 INFO L215 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] [2024-10-15 15:24:56,339 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 15:24:56,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 15:24:56,525 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:56,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:56,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1140395608, now seen corresponding path program 1 times [2024-10-15 15:24:56,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:56,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729647055] [2024-10-15 15:24:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:56,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:56,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:24:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:56,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:24:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:56,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:24:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:56,991 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:24:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:56,993 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 15:24:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:56,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:24:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 15:24:57,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:57,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729647055] [2024-10-15 15:24:57,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729647055] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:24:57,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:24:57,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-15 15:24:57,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820003029] [2024-10-15 15:24:57,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:24:57,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 15:24:57,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:57,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 15:24:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-15 15:24:57,003 INFO L87 Difference]: Start difference. First operand 88 states and 122 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) [2024-10-15 15:24:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:57,293 INFO L93 Difference]: Finished difference Result 147 states and 228 transitions. [2024-10-15 15:24:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:24:57,293 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 [2024-10-15 15:24:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:57,294 INFO L225 Difference]: With dead ends: 147 [2024-10-15 15:24:57,294 INFO L226 Difference]: Without dead ends: 90 [2024-10-15 15:24:57,295 INFO L431 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 [2024-10-15 15:24:57,296 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-10-15 15:24:57,296 INFO L433 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] [2024-10-15 15:24:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-15 15:24:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2024-10-15 15:24:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 62 states have internal predecessors, (71), 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) [2024-10-15 15:24:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2024-10-15 15:24:57,331 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 48 [2024-10-15 15:24:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:57,331 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2024-10-15 15:24:57,331 INFO L472 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) [2024-10-15 15:24:57,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:57,331 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2024-10-15 15:24:57,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:24:57,332 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:57,332 INFO L215 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] [2024-10-15 15:24:57,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-15 15:24:57,332 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:57,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash -632852570, now seen corresponding path program 1 times [2024-10-15 15:24:57,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:57,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059279533] [2024-10-15 15:24:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:57,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:57,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:24:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:57,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:24:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:57,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:24:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:57,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:24:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:57,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 15:24:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:57,787 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:24:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 15:24:57,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:57,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059279533] [2024-10-15 15:24:57,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059279533] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:24:57,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:24:57,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-15 15:24:57,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850626974] [2024-10-15 15:24:57,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:24:57,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 15:24:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:57,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 15:24:57,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-15 15:24:57,792 INFO L87 Difference]: Start difference. First operand 83 states and 109 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) [2024-10-15 15:24:58,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:58,066 INFO L93 Difference]: Finished difference Result 135 states and 198 transitions. [2024-10-15 15:24:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 15:24:58,067 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 [2024-10-15 15:24:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:58,068 INFO L225 Difference]: With dead ends: 135 [2024-10-15 15:24:58,068 INFO L226 Difference]: Without dead ends: 89 [2024-10-15 15:24:58,069 INFO L431 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 [2024-10-15 15:24:58,069 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:24:58,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 66 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:24:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-10-15 15:24:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2024-10-15 15:24:58,121 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) [2024-10-15 15:24:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2024-10-15 15:24:58,122 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 48 [2024-10-15 15:24:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:58,123 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2024-10-15 15:24:58,123 INFO L472 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) [2024-10-15 15:24:58,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2024-10-15 15:24:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:24:58,124 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:58,124 INFO L215 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] [2024-10-15 15:24:58,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-15 15:24:58,124 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:58,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:58,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1274409114, now seen corresponding path program 1 times [2024-10-15 15:24:58,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:58,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847327297] [2024-10-15 15:24:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:58,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:24:58,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431293078] [2024-10-15 15:24:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:58,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:58,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:24:58,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:24:58,160 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 15:24:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:58,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-10-15 15:24:58,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:24:58,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:24:58,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:24:58,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:24:58,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:24:58,397 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 [2024-10-15 15:24:58,404 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 [2024-10-15 15:24:59,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-10-15 15:24:59,287 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 [2024-10-15 15:24:59,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:24:59,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-15 15:24:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:24:59,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:25:00,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:25:00,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847327297] [2024-10-15 15:25:00,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:25:00,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431293078] [2024-10-15 15:25:00,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431293078] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:25:00,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:25:00,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-15 15:25:00,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549161114] [2024-10-15 15:25:00,225 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:25:00,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 15:25:00,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:25:00,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 15:25:00,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-10-15 15:25:00,227 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2024-10-15 15:25:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:25:00,836 INFO L93 Difference]: Finished difference Result 97 states and 132 transitions. [2024-10-15 15:25:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 15:25:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 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 [2024-10-15 15:25:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:25:00,838 INFO L225 Difference]: With dead ends: 97 [2024-10-15 15:25:00,838 INFO L226 Difference]: Without dead ends: 95 [2024-10-15 15:25:00,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-10-15 15:25:00,840 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:25:00,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 159 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 15:25:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-15 15:25:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2024-10-15 15:25:00,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 65 states have internal predecessors, (73), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (26), 10 states have call predecessors, (26), 14 states have call successors, (26) [2024-10-15 15:25:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 115 transitions. [2024-10-15 15:25:00,903 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 115 transitions. Word has length 48 [2024-10-15 15:25:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:25:00,904 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 115 transitions. [2024-10-15 15:25:00,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2024-10-15 15:25:00,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:00,905 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 115 transitions. [2024-10-15 15:25:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:25:00,906 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:25:00,906 INFO L215 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] [2024-10-15 15:25:00,925 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-15 15:25:01,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-15 15:25:01,107 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:25:01,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash -851707288, now seen corresponding path program 1 times [2024-10-15 15:25:01,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:25:01,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351201314] [2024-10-15 15:25:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:01,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:25:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:01,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:25:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:01,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:25:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:01,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:25:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:01,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:25:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:01,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 15:25:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:01,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:25:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-15 15:25:01,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:25:01,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351201314] [2024-10-15 15:25:01,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351201314] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:25:01,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:25:01,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:25:01,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892168368] [2024-10-15 15:25:01,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:25:01,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:25:01,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:25:01,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:25:01,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:25:01,675 INFO L87 Difference]: Start difference. First operand 86 states and 115 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) [2024-10-15 15:25:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:25:01,935 INFO L93 Difference]: Finished difference Result 120 states and 220 transitions. [2024-10-15 15:25:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 15:25:01,935 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 [2024-10-15 15:25:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:25:01,936 INFO L225 Difference]: With dead ends: 120 [2024-10-15 15:25:01,937 INFO L226 Difference]: Without dead ends: 100 [2024-10-15 15:25:01,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-10-15 15:25:01,937 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 44 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:25:01,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 82 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:25:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-15 15:25:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2024-10-15 15:25:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 65 states have internal predecessors, (73), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (26), 10 states have call predecessors, (26), 14 states have call successors, (26) [2024-10-15 15:25:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 115 transitions. [2024-10-15 15:25:01,993 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 115 transitions. Word has length 48 [2024-10-15 15:25:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:25:01,993 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 115 transitions. [2024-10-15 15:25:01,993 INFO L472 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) [2024-10-15 15:25:01,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 115 transitions. [2024-10-15 15:25:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:25:01,994 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:25:01,994 INFO L215 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] [2024-10-15 15:25:01,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-15 15:25:01,995 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:25:01,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:01,995 INFO L85 PathProgramCache]: Analyzing trace with hash -570812956, now seen corresponding path program 1 times [2024-10-15 15:25:01,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:25:01,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280836047] [2024-10-15 15:25:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:01,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:25:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:25:02,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698197215] [2024-10-15 15:25:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:02,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:02,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:25:02,024 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) [2024-10-15 15:25:02,025 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 15:25:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:02,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-10-15 15:25:02,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:25:02,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:02,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:02,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:02,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:02,248 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 [2024-10-15 15:25:02,251 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 [2024-10-15 15:25:03,087 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 [2024-10-15 15:25:03,093 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 [2024-10-15 15:25:03,124 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 38 treesize of output 22 [2024-10-15 15:25:03,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:25:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:25:03,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:25:04,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:25:04,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280836047] [2024-10-15 15:25:04,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:25:04,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698197215] [2024-10-15 15:25:04,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698197215] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:25:04,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:25:04,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-15 15:25:04,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152840835] [2024-10-15 15:25:04,433 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:25:04,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 15:25:04,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:25:04,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 15:25:04,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-10-15 15:25:04,434 INFO L87 Difference]: Start difference. First operand 86 states and 115 transitions. Second operand has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2024-10-15 15:25:05,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:25:05,535 INFO L93 Difference]: Finished difference Result 97 states and 132 transitions. [2024-10-15 15:25:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 15:25:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 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 [2024-10-15 15:25:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:25:05,537 INFO L225 Difference]: With dead ends: 97 [2024-10-15 15:25:05,537 INFO L226 Difference]: Without dead ends: 95 [2024-10-15 15:25:05,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:25:05,538 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 15:25:05,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 172 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 15:25:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-15 15:25:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2024-10-15 15:25:05,591 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) [2024-10-15 15:25:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2024-10-15 15:25:05,594 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 48 [2024-10-15 15:25:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:25:05,594 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2024-10-15 15:25:05,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2024-10-15 15:25:05,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2024-10-15 15:25:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-15 15:25:05,596 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:25:05,596 INFO L215 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] [2024-10-15 15:25:05,614 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-15 15:25:05,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-15 15:25:05,797 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:25:05,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1482227333, now seen corresponding path program 1 times [2024-10-15 15:25:05,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:25:05,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184930037] [2024-10-15 15:25:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:05,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:25:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:25:05,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125290283] [2024-10-15 15:25:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:05,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:05,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:25:05,838 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) [2024-10-15 15:25:05,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 15:25:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:06,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-10-15 15:25:06,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:25:06,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:25:06,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:06,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:06,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:06,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:06,068 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 [2024-10-15 15:25:06,075 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 11 treesize of output 7 [2024-10-15 15:25:07,289 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 [2024-10-15 15:25:07,292 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 [2024-10-15 15:25:07,298 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 [2024-10-15 15:25:07,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-15 15:25:07,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:25:07,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-10-15 15:25:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 15:25:07,420 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:25:10,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:25:10,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184930037] [2024-10-15 15:25:10,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:25:10,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125290283] [2024-10-15 15:25:10,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125290283] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:25:10,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:25:10,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-15 15:25:10,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959366204] [2024-10-15 15:25:10,017 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:25:10,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 15:25:10,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:25:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 15:25:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-10-15 15:25:10,018 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand has 20 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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) [2024-10-15 15:25:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:25:11,292 INFO L93 Difference]: Finished difference Result 100 states and 145 transitions. [2024-10-15 15:25:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 15:25:11,292 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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 [2024-10-15 15:25:11,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:25:11,293 INFO L225 Difference]: With dead ends: 100 [2024-10-15 15:25:11,294 INFO L226 Difference]: Without dead ends: 98 [2024-10-15 15:25:11,294 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:25:11,295 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-15 15:25:11,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 151 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-15 15:25:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-15 15:25:11,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2024-10-15 15:25:11,351 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) [2024-10-15 15:25:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2024-10-15 15:25:11,353 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 61 [2024-10-15 15:25:11,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:25:11,353 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2024-10-15 15:25:11,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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) [2024-10-15 15:25:11,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:11,354 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2024-10-15 15:25:11,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-15 15:25:11,355 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:25:11,355 INFO L215 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] [2024-10-15 15:25:11,373 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-15 15:25:11,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:11,560 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:25:11,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:11,560 INFO L85 PathProgramCache]: Analyzing trace with hash -363139833, now seen corresponding path program 1 times [2024-10-15 15:25:11,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:25:11,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591652176] [2024-10-15 15:25:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:11,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:25:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:11,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:25:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:11,592 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:25:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:11,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:25:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:11,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:25:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:11,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 15:25:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:11,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:25:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:11,642 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:25:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:11,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:25:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-15 15:25:11,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:25:11,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591652176] [2024-10-15 15:25:11,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591652176] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:25:11,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816040877] [2024-10-15 15:25:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:11,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:11,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:25:11,650 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) [2024-10-15 15:25:11,651 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 15:25:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:11,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-15 15:25:11,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:25:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 15:25:11,829 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:25:11,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816040877] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:25:11,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:25:11,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-10-15 15:25:11,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853806209] [2024-10-15 15:25:11,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:25:11,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-15 15:25:11,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:25:11,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-15 15:25:11,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-15 15:25:11,831 INFO L87 Difference]: Start difference. First operand 89 states and 127 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) [2024-10-15 15:25:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:25:11,898 INFO L93 Difference]: Finished difference Result 141 states and 216 transitions. [2024-10-15 15:25:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-15 15:25:11,898 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 [2024-10-15 15:25:11,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:25:11,899 INFO L225 Difference]: With dead ends: 141 [2024-10-15 15:25:11,900 INFO L226 Difference]: Without dead ends: 89 [2024-10-15 15:25:11,900 INFO L431 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 [2024-10-15 15:25:11,901 INFO L432 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 [2024-10-15 15:25:11,901 INFO L433 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] [2024-10-15 15:25:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-10-15 15:25:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-10-15 15:25:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 67 states have internal predecessors, (73), 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) [2024-10-15 15:25:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 126 transitions. [2024-10-15 15:25:11,962 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 126 transitions. Word has length 61 [2024-10-15 15:25:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:25:11,963 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 126 transitions. [2024-10-15 15:25:11,963 INFO L472 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) [2024-10-15 15:25:11,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 126 transitions. [2024-10-15 15:25:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-15 15:25:11,964 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:25:11,964 INFO L215 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] [2024-10-15 15:25:11,979 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-15 15:25:12,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:12,169 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:25:12,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:12,169 INFO L85 PathProgramCache]: Analyzing trace with hash -511014421, now seen corresponding path program 1 times [2024-10-15 15:25:12,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:25:12,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914587016] [2024-10-15 15:25:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:12,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:25:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:25:12,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108321313] [2024-10-15 15:25:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:12,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:12,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:25:12,207 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) [2024-10-15 15:25:12,208 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-15 15:25:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:12,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 167 conjuncts are in the unsatisfiable core [2024-10-15 15:25:12,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:25:12,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:12,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:12,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:12,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:12,430 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 [2024-10-15 15:25:12,435 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 [2024-10-15 15:25:13,713 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 [2024-10-15 15:25:13,716 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 [2024-10-15 15:25:13,721 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 [2024-10-15 15:25:13,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-15 15:25:13,770 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 [2024-10-15 15:25:13,772 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 [2024-10-15 15:25:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 15:25:13,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:25:16,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:25:16,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914587016] [2024-10-15 15:25:16,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:25:16,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108321313] [2024-10-15 15:25:16,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108321313] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:25:16,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:25:16,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 15:25:16,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634812235] [2024-10-15 15:25:16,547 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:25:16,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 15:25:16,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:25:16,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 15:25:16,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2024-10-15 15:25:16,547 INFO L87 Difference]: Start difference. First operand 89 states and 126 transitions. Second operand has 18 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 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) [2024-10-15 15:25:18,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:25:18,423 INFO L93 Difference]: Finished difference Result 103 states and 160 transitions. [2024-10-15 15:25:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 15:25:18,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 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 [2024-10-15 15:25:18,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:25:18,425 INFO L225 Difference]: With dead ends: 103 [2024-10-15 15:25:18,425 INFO L226 Difference]: Without dead ends: 101 [2024-10-15 15:25:18,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2024-10-15 15:25:18,426 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:25:18,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 191 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-15 15:25:18,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-15 15:25:18,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2024-10-15 15:25:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 68 states have internal predecessors, (73), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (40), 11 states have call predecessors, (40), 16 states have call successors, (40) [2024-10-15 15:25:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 131 transitions. [2024-10-15 15:25:18,484 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 131 transitions. Word has length 63 [2024-10-15 15:25:18,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:25:18,484 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 131 transitions. [2024-10-15 15:25:18,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 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) [2024-10-15 15:25:18,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 131 transitions. [2024-10-15 15:25:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-15 15:25:18,485 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:25:18,485 INFO L215 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] [2024-10-15 15:25:18,498 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-15 15:25:18,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:18,686 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:25:18,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash 686182317, now seen corresponding path program 1 times [2024-10-15 15:25:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:25:18,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972657267] [2024-10-15 15:25:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:18,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:25:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:25:18,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016019940] [2024-10-15 15:25:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:18,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:18,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:25:18,730 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) [2024-10-15 15:25:18,733 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-15 15:25:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:19,011 WARN L253 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 262 conjuncts are in the unsatisfiable core [2024-10-15 15:25:19,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:25:19,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:25:19,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:25:19,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:19,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:25:19,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:19,066 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 [2024-10-15 15:25:19,086 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 [2024-10-15 15:25:19,097 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 [2024-10-15 15:25:22,057 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 [2024-10-15 15:25:22,067 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 44 treesize of output 21 [2024-10-15 15:25:22,070 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 24 [2024-10-15 15:25:22,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:25:22,142 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 54 treesize of output 46 [2024-10-15 15:25:22,146 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 [2024-10-15 15:25:22,151 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 [2024-10-15 15:25:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 15:25:22,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:25:47,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:25:47,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972657267] [2024-10-15 15:25:47,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:25:47,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016019940] [2024-10-15 15:25:47,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016019940] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:25:47,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:25:47,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-10-15 15:25:47,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645789775] [2024-10-15 15:25:47,635 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:25:47,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-15 15:25:47,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:25:47,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-15 15:25:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1123, Unknown=3, NotChecked=0, Total=1260 [2024-10-15 15:25:47,637 INFO L87 Difference]: Start difference. First operand 90 states and 131 transitions. Second operand has 30 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 8 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:25:51,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:25:58,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:26:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:26:02,146 INFO L93 Difference]: Finished difference Result 105 states and 170 transitions. [2024-10-15 15:26:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-15 15:26:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 8 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 63 [2024-10-15 15:26:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:26:02,149 INFO L225 Difference]: With dead ends: 105 [2024-10-15 15:26:02,149 INFO L226 Difference]: Without dead ends: 103 [2024-10-15 15:26:02,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=283, Invalid=2470, Unknown=3, NotChecked=0, Total=2756 [2024-10-15 15:26:02,151 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:26:02,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 251 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1439 Invalid, 2 Unknown, 0 Unchecked, 12.8s Time] [2024-10-15 15:26:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-15 15:26:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2024-10-15 15:26:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 67 states have internal predecessors, (73), 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) [2024-10-15 15:26:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 126 transitions. [2024-10-15 15:26:02,204 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 126 transitions. Word has length 63 [2024-10-15 15:26:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:26:02,204 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 126 transitions. [2024-10-15 15:26:02,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 8 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:26:02,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:02,205 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 126 transitions. [2024-10-15 15:26:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-15 15:26:02,206 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:26:02,206 INFO L215 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] [2024-10-15 15:26:02,223 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-15 15:26:02,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-15 15:26:02,411 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:26:02,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1272988331, now seen corresponding path program 1 times [2024-10-15 15:26:02,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:26:02,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769200960] [2024-10-15 15:26:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:02,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:26:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:26:02,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551213548] [2024-10-15 15:26:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:02,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:02,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:26:02,445 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) [2024-10-15 15:26:02,446 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-15 15:26:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:02,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-10-15 15:26:02,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:26:02,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:26:02,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:26:02,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:26:02,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:26:02,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:26:02,941 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 [2024-10-15 15:26:02,944 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 [2024-10-15 15:26:43,488 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 [2024-10-15 15:26:43,492 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 [2024-10-15 15:26:43,502 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 [2024-10-15 15:26:43,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:26:43,598 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 [2024-10-15 15:26:43,611 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 37 treesize of output 25 [2024-10-15 15:26:43,617 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 [2024-10-15 15:26:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:26:43,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:26:46,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:26:46,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769200960] [2024-10-15 15:26:46,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:26:46,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551213548] [2024-10-15 15:26:46,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551213548] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:26:46,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:26:46,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-10-15 15:26:46,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055464339] [2024-10-15 15:26:46,966 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:26:46,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-15 15:26:46,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:26:46,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-15 15:26:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:26:46,967 INFO L87 Difference]: Start difference. First operand 89 states and 126 transitions. Second operand has 28 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:26:51,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:26:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:26:54,129 INFO L93 Difference]: Finished difference Result 105 states and 170 transitions. [2024-10-15 15:26:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-15 15:26:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 63 [2024-10-15 15:26:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:26:54,131 INFO L225 Difference]: With dead ends: 105 [2024-10-15 15:26:54,131 INFO L226 Difference]: Without dead ends: 103 [2024-10-15 15:26:54,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2024-10-15 15:26:54,132 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:26:54,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 275 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1022 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2024-10-15 15:26:54,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-15 15:26:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 88. [2024-10-15 15:26:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 66 states have internal predecessors, (73), 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) [2024-10-15 15:26:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-10-15 15:26:54,195 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 63 [2024-10-15 15:26:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:26:54,196 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-10-15 15:26:54,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:26:54,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-10-15 15:26:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 15:26:54,197 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:26:54,197 INFO L215 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] [2024-10-15 15:26:54,206 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-15 15:26:54,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:54,402 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:26:54,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:54,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1521485639, now seen corresponding path program 1 times [2024-10-15 15:26:54,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:26:54,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88608068] [2024-10-15 15:26:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:54,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:26:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:26:54,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963876307] [2024-10-15 15:26:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:54,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:54,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:26:54,424 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) [2024-10-15 15:26:54,425 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-15 15:26:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:54,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-15 15:26:54,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:26:54,716 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 [2024-10-15 15:26:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:26:54,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:26:55,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:26:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88608068] [2024-10-15 15:26:55,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:26:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963876307] [2024-10-15 15:26:55,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963876307] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:26:55,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:26:55,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-10-15 15:26:55,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959209394] [2024-10-15 15:26:55,133 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:26:55,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-15 15:26:55,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:26:55,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-15 15:26:55,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-15 15:26:55,134 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 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) [2024-10-15 15:26:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:26:55,617 INFO L93 Difference]: Finished difference Result 121 states and 192 transitions. [2024-10-15 15:26:55,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:26:55,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 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 52 [2024-10-15 15:26:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:26:55,619 INFO L225 Difference]: With dead ends: 121 [2024-10-15 15:26:55,619 INFO L226 Difference]: Without dead ends: 105 [2024-10-15 15:26:55,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2024-10-15 15:26:55,620 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 13 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:26:55,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 109 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 354 Invalid, 5 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:26:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-15 15:26:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 98. [2024-10-15 15:26:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.196969696969697) internal successors, (79), 71 states have internal predecessors, (79), 17 states have call successors, (17), 11 states have call predecessors, (17), 14 states have return successors, (50), 15 states have call predecessors, (50), 14 states have call successors, (50) [2024-10-15 15:26:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 146 transitions. [2024-10-15 15:26:55,685 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 146 transitions. Word has length 52 [2024-10-15 15:26:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:26:55,685 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 146 transitions. [2024-10-15 15:26:55,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 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) [2024-10-15 15:26:55,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 146 transitions. [2024-10-15 15:26:55,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 15:26:55,687 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:26:55,687 INFO L215 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] [2024-10-15 15:26:55,703 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-15 15:26:55,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:55,891 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:26:55,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1183574303, now seen corresponding path program 1 times [2024-10-15 15:26:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:26:55,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621246769] [2024-10-15 15:26:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:55,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:26:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:26:55,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118685005] [2024-10-15 15:26:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:55,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:55,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:26:55,918 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) [2024-10-15 15:26:55,922 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-15 15:26:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:56,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-10-15 15:26:56,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:26:56,183 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 [2024-10-15 15:26:56,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:26:56,188 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 15 treesize of output 1 [2024-10-15 15:26:56,612 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 [2024-10-15 15:26:56,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-10-15 15:26:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-15 15:26:56,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:27:01,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:27:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621246769] [2024-10-15 15:27:01,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:27:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118685005] [2024-10-15 15:27:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118685005] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:27:01,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:27:01,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-10-15 15:27:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191924445] [2024-10-15 15:27:01,578 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:27:01,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 15:27:01,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:27:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 15:27:01,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=765, Unknown=1, NotChecked=0, Total=870 [2024-10-15 15:27:01,579 INFO L87 Difference]: Start difference. First operand 98 states and 146 transitions. Second operand has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:27:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:27:02,580 INFO L93 Difference]: Finished difference Result 113 states and 174 transitions. [2024-10-15 15:27:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 15:27:02,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (9), 4 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 54 [2024-10-15 15:27:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:27:02,582 INFO L225 Difference]: With dead ends: 113 [2024-10-15 15:27:02,582 INFO L226 Difference]: Without dead ends: 103 [2024-10-15 15:27:02,582 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=216, Invalid=1943, Unknown=3, NotChecked=0, Total=2162 [2024-10-15 15:27:02,583 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 19 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:27:02,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 193 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 852 Invalid, 5 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 15:27:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-15 15:27:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2024-10-15 15:27:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 73 states have internal predecessors, (80), 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) [2024-10-15 15:27:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 162 transitions. [2024-10-15 15:27:02,644 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 162 transitions. Word has length 54 [2024-10-15 15:27:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:27:02,644 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 162 transitions. [2024-10-15 15:27:02,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:27:02,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 162 transitions. [2024-10-15 15:27:02,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 15:27:02,646 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:27:02,646 INFO L215 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] [2024-10-15 15:27:02,665 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-15 15:27:02,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-15 15:27:02,847 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:27:02,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:02,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1445510689, now seen corresponding path program 1 times [2024-10-15 15:27:02,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:27:02,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293305107] [2024-10-15 15:27:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:02,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:27:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:27:02,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737047568] [2024-10-15 15:27:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:02,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:27:02,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:27:02,876 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) [2024-10-15 15:27:02,884 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-15 15:27:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:03,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-10-15 15:27:03,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:27:03,138 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 [2024-10-15 15:27:03,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:27:03,397 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 [2024-10-15 15:27:03,743 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 [2024-10-15 15:27:03,876 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 11 [2024-10-15 15:27:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:27:03,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:27:05,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:27:05,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293305107] [2024-10-15 15:27:05,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:27:05,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737047568] [2024-10-15 15:27:05,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737047568] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:27:05,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:27:05,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-10-15 15:27:05,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747879588] [2024-10-15 15:27:05,217 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:27:05,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 15:27:05,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:27:05,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 15:27:05,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 15:27:05,219 INFO L87 Difference]: Start difference. First operand 101 states and 162 transitions. Second operand has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 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) [2024-10-15 15:27:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:27:06,565 INFO L93 Difference]: Finished difference Result 149 states and 296 transitions. [2024-10-15 15:27:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-15 15:27:06,565 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 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 54 [2024-10-15 15:27:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:27:06,567 INFO L225 Difference]: With dead ends: 149 [2024-10-15 15:27:06,567 INFO L226 Difference]: Without dead ends: 139 [2024-10-15 15:27:06,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2024-10-15 15:27:06,568 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 23 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:27:06,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 235 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1114 Invalid, 4 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 15:27:06,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-15 15:27:06,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2024-10-15 15:27:06,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 78 states have internal predecessors, (83), 21 states have call successors, (21), 11 states have call predecessors, (21), 17 states have return successors, (99), 19 states have call predecessors, (99), 17 states have call successors, (99) [2024-10-15 15:27:06,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 203 transitions. [2024-10-15 15:27:06,665 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 203 transitions. Word has length 54 [2024-10-15 15:27:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:27:06,665 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 203 transitions. [2024-10-15 15:27:06,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 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) [2024-10-15 15:27:06,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 203 transitions. [2024-10-15 15:27:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-15 15:27:06,667 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:27:06,668 INFO L215 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] [2024-10-15 15:27:06,686 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-15 15:27:06,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-15 15:27:06,868 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:27:06,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2060506709, now seen corresponding path program 1 times [2024-10-15 15:27:06,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:27:06,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153363648] [2024-10-15 15:27:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:06,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:27:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:07,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:27:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:07,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:27:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:07,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:27:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:07,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:07,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 15:27:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:08,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:08,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:27:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:08,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-15 15:27:08,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:27:08,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153363648] [2024-10-15 15:27:08,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153363648] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:27:08,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578788674] [2024-10-15 15:27:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:08,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:27:08,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:27:08,093 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) [2024-10-15 15:27:08,094 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-15 15:27:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:08,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-15 15:27:08,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:27:08,361 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 23 treesize of output 15 [2024-10-15 15:27:08,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:27:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 15:27:08,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:27:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 15:27:09,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578788674] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:27:09,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:27:09,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2024-10-15 15:27:09,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619934676] [2024-10-15 15:27:09,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:27:09,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-15 15:27:09,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:27:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-15 15:27:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:27:09,222 INFO L87 Difference]: Start difference. First operand 109 states and 203 transitions. Second operand has 31 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 26 states have internal predecessors, (67), 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) [2024-10-15 15:27:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:27:11,269 INFO L93 Difference]: Finished difference Result 282 states and 1014 transitions. [2024-10-15 15:27:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-15 15:27:11,269 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 26 states have internal predecessors, (67), 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 [2024-10-15 15:27:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:27:11,273 INFO L225 Difference]: With dead ends: 282 [2024-10-15 15:27:11,273 INFO L226 Difference]: Without dead ends: 210 [2024-10-15 15:27:11,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=372, Invalid=2934, Unknown=0, NotChecked=0, Total=3306 [2024-10-15 15:27:11,275 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 102 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:27:11,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 261 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-15 15:27:11,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-10-15 15:27:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 159. [2024-10-15 15:27:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 115 states have internal predecessors, (123), 28 states have call successors, (28), 12 states have call predecessors, (28), 29 states have return successors, (274), 31 states have call predecessors, (274), 24 states have call successors, (274) [2024-10-15 15:27:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 425 transitions. [2024-10-15 15:27:11,460 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 425 transitions. Word has length 65 [2024-10-15 15:27:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:27:11,461 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 425 transitions. [2024-10-15 15:27:11,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 26 states have internal predecessors, (67), 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) [2024-10-15 15:27:11,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 425 transitions. [2024-10-15 15:27:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-15 15:27:11,463 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:27:11,463 INFO L215 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] [2024-10-15 15:27:11,481 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-15 15:27:11,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-15 15:27:11,664 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:27:11,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1590925951, now seen corresponding path program 2 times [2024-10-15 15:27:11,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:27:11,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701072885] [2024-10-15 15:27:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:11,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:27:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:12,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:27:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:12,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:27:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:12,083 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:27:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:12,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:12,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:27:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:12,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:12,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:27:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:12,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:27:12,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:27:12,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701072885] [2024-10-15 15:27:12,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701072885] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:27:12,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057540479] [2024-10-15 15:27:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:27:12,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:27:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:27:12,555 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) [2024-10-15 15:27:12,556 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-15 15:27:12,833 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:27:12,834 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:27:12,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 15:27:12,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:27:12,940 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 [2024-10-15 15:27:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:27:13,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:27:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:27:13,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057540479] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:27:13,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:27:13,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 26 [2024-10-15 15:27:13,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166832714] [2024-10-15 15:27:13,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:27:13,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 15:27:13,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:27:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 15:27:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2024-10-15 15:27:13,683 INFO L87 Difference]: Start difference. First operand 159 states and 425 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) [2024-10-15 15:27:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:27:15,627 INFO L93 Difference]: Finished difference Result 397 states and 2004 transitions. [2024-10-15 15:27:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-15 15:27:15,627 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 [2024-10-15 15:27:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:27:15,635 INFO L225 Difference]: With dead ends: 397 [2024-10-15 15:27:15,635 INFO L226 Difference]: Without dead ends: 343 [2024-10-15 15:27:15,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=763, Invalid=3143, Unknown=0, NotChecked=0, Total=3906 [2024-10-15 15:27:15,638 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 233 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:27:15,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 177 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 15:27:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-10-15 15:27:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 240. [2024-10-15 15:27:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 156 states have internal predecessors, (163), 28 states have call successors, (28), 12 states have call predecessors, (28), 70 states have return successors, (748), 71 states have call predecessors, (748), 25 states have call successors, (748) [2024-10-15 15:27:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 939 transitions. [2024-10-15 15:27:15,920 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 939 transitions. Word has length 63 [2024-10-15 15:27:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:27:15,920 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 939 transitions. [2024-10-15 15:27:15,920 INFO L472 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) [2024-10-15 15:27:15,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 939 transitions. [2024-10-15 15:27:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-15 15:27:15,924 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:27:15,924 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2024-10-15 15:27:15,942 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-15 15:27:16,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-15 15:27:16,125 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:27:16,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:16,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1768826007, now seen corresponding path program 1 times [2024-10-15 15:27:16,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:27:16,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204598899] [2024-10-15 15:27:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:16,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:27:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:16,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:27:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:16,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:27:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:16,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:27:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:16,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:16,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 15:27:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:16,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:16,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:27:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:17,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:27:17,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:27:17,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204598899] [2024-10-15 15:27:17,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204598899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:27:17,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487916587] [2024-10-15 15:27:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:27:17,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:27:17,025 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) [2024-10-15 15:27:17,026 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-15 15:27:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:17,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-15 15:27:17,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:27:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 15:27:17,377 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:27:17,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487916587] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:27:17,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:27:17,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2024-10-15 15:27:17,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642727308] [2024-10-15 15:27:17,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:27:17,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 15:27:17,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:27:17,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 15:27:17,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-10-15 15:27:17,379 INFO L87 Difference]: Start difference. First operand 240 states and 939 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) [2024-10-15 15:27:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:27:17,623 INFO L93 Difference]: Finished difference Result 400 states and 1698 transitions. [2024-10-15 15:27:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 15:27:17,624 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 [2024-10-15 15:27:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:27:17,627 INFO L225 Difference]: With dead ends: 400 [2024-10-15 15:27:17,627 INFO L226 Difference]: Without dead ends: 191 [2024-10-15 15:27:17,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-10-15 15:27:17,633 INFO L432 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 [2024-10-15 15:27:17,633 INFO L433 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] [2024-10-15 15:27:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-10-15 15:27:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 161. [2024-10-15 15:27:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 111 states have internal predecessors, (117), 21 states have call successors, (21), 12 states have call predecessors, (21), 36 states have return successors, (199), 37 states have call predecessors, (199), 18 states have call successors, (199) [2024-10-15 15:27:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 337 transitions. [2024-10-15 15:27:17,812 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 337 transitions. Word has length 65 [2024-10-15 15:27:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:27:17,812 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 337 transitions. [2024-10-15 15:27:17,813 INFO L472 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) [2024-10-15 15:27:17,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 337 transitions. [2024-10-15 15:27:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 15:27:17,814 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:27:17,814 INFO L215 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] [2024-10-15 15:27:17,832 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-15 15:27:18,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-15 15:27:18,019 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:27:18,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1422878435, now seen corresponding path program 1 times [2024-10-15 15:27:18,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:27:18,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297785340] [2024-10-15 15:27:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:18,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:27:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:27:18,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7243899] [2024-10-15 15:27:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:18,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:27:18,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:27:18,048 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) [2024-10-15 15:27:18,050 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-15 15:27:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:18,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-15 15:27:18,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:27:18,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:27:18,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:27:18,510 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 48 treesize of output 21 [2024-10-15 15:27:18,667 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 17 treesize of output 9 [2024-10-15 15:27:18,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-15 15:27:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:27:18,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:27:18,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:27:18,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297785340] [2024-10-15 15:27:18,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:27:18,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7243899] [2024-10-15 15:27:18,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7243899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:27:18,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:27:18,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-15 15:27:18,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322414302] [2024-10-15 15:27:18,889 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:27:18,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 15:27:18,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:27:18,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 15:27:18,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-10-15 15:27:18,890 INFO L87 Difference]: Start difference. First operand 161 states and 337 transitions. Second operand has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-15 15:27:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:27:19,962 INFO L93 Difference]: Finished difference Result 217 states and 476 transitions. [2024-10-15 15:27:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 15:27:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2024-10-15 15:27:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:27:19,965 INFO L225 Difference]: With dead ends: 217 [2024-10-15 15:27:19,965 INFO L226 Difference]: Without dead ends: 207 [2024-10-15 15:27:19,966 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 15:27:19,966 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 27 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:27:19,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 172 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 763 Invalid, 7 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 15:27:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-10-15 15:27:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 171. [2024-10-15 15:27:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 116 states have internal predecessors, (122), 22 states have call successors, (22), 12 states have call predecessors, (22), 40 states have return successors, (228), 42 states have call predecessors, (228), 18 states have call successors, (228) [2024-10-15 15:27:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 372 transitions. [2024-10-15 15:27:20,120 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 372 transitions. Word has length 54 [2024-10-15 15:27:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:27:20,121 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 372 transitions. [2024-10-15 15:27:20,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-15 15:27:20,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 372 transitions. [2024-10-15 15:27:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-15 15:27:20,123 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:27:20,123 INFO L215 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] [2024-10-15 15:27:20,142 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-15 15:27:20,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:27:20,324 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:27:20,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash -682253735, now seen corresponding path program 1 times [2024-10-15 15:27:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:27:20,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516549993] [2024-10-15 15:27:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:20,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:27:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:20,772 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:27:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:20,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:27:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:20,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:27:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:21,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:21,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 15:27:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:21,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:21,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:27:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:21,388 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:27:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:27:21,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:27:21,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516549993] [2024-10-15 15:27:21,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516549993] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:27:21,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337700594] [2024-10-15 15:27:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:21,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:27:21,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:27:21,395 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) [2024-10-15 15:27:21,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-15 15:27:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:21,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-15 15:27:21,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:27:21,802 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 48 treesize of output 21 [2024-10-15 15:27:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:27:22,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:27:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:27:23,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337700594] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:27:23,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:27:23,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 17] total 43 [2024-10-15 15:27:23,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286552771] [2024-10-15 15:27:23,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:27:23,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-15 15:27:23,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:27:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-15 15:27:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1514, Unknown=0, NotChecked=0, Total=1806 [2024-10-15 15:27:23,035 INFO L87 Difference]: Start difference. First operand 171 states and 372 transitions. Second operand has 43 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 39 states have internal predecessors, (87), 12 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2024-10-15 15:27:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:27:25,511 INFO L93 Difference]: Finished difference Result 355 states and 1023 transitions. [2024-10-15 15:27:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-15 15:27:25,511 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 39 states have internal predecessors, (87), 12 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) Word has length 65 [2024-10-15 15:27:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:27:25,514 INFO L225 Difference]: With dead ends: 355 [2024-10-15 15:27:25,514 INFO L226 Difference]: Without dead ends: 221 [2024-10-15 15:27:25,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1369, Invalid=5603, Unknown=0, NotChecked=0, Total=6972 [2024-10-15 15:27:25,518 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 245 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:27:25,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 249 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-15 15:27:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-10-15 15:27:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2024-10-15 15:27:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 122 states have internal predecessors, (131), 25 states have call successors, (25), 14 states have call predecessors, (25), 32 states have return successors, (181), 34 states have call predecessors, (181), 22 states have call successors, (181) [2024-10-15 15:27:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 337 transitions. [2024-10-15 15:27:25,679 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 337 transitions. Word has length 65 [2024-10-15 15:27:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:27:25,679 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 337 transitions. [2024-10-15 15:27:25,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 39 states have internal predecessors, (87), 12 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2024-10-15 15:27:25,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 337 transitions. [2024-10-15 15:27:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-15 15:27:25,682 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:27:25,682 INFO L215 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] [2024-10-15 15:27:25,700 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-15 15:27:25,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:27:25,882 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:27:25,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:25,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1813149505, now seen corresponding path program 1 times [2024-10-15 15:27:25,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:27:25,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031662501] [2024-10-15 15:27:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:25,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:27:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:27:25,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887989683] [2024-10-15 15:27:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:27:25,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:27:25,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:27:25,913 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) [2024-10-15 15:27:25,915 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-15 15:27:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:27:26,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-10-15 15:27:26,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:27:26,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:27:26,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:27:26,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:27:26,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:27:26,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:27:26,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:27:26,313 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 [2024-10-15 15:27:26,320 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 [2024-10-15 15:27:29,683 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 [2024-10-15 15:27:29,690 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 [2024-10-15 15:27:29,766 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 [2024-10-15 15:27:29,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-15 15:27:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:27:29,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:27:33,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:27:33,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031662501] [2024-10-15 15:27:33,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:27:33,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887989683] [2024-10-15 15:27:33,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887989683] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:27:33,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:27:33,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-10-15 15:27:33,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35065463] [2024-10-15 15:27:33,678 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:27:33,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 15:27:33,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:27:33,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 15:27:33,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:27:33,680 INFO L87 Difference]: Start difference. First operand 171 states and 337 transitions. Second operand has 26 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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) [2024-10-15 15:27:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:27:36,732 INFO L93 Difference]: Finished difference Result 204 states and 426 transitions. [2024-10-15 15:27:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 15:27:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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 [2024-10-15 15:27:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:27:36,735 INFO L225 Difference]: With dead ends: 204 [2024-10-15 15:27:36,736 INFO L226 Difference]: Without dead ends: 182 [2024-10-15 15:27:36,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2024-10-15 15:27:36,737 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:27:36,737 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 209 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-10-15 15:27:36,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-15 15:27:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2024-10-15 15:27:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 123 states have internal predecessors, (132), 25 states have call successors, (25), 14 states have call predecessors, (25), 33 states have return successors, (186), 35 states have call predecessors, (186), 22 states have call successors, (186) [2024-10-15 15:27:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 343 transitions. [2024-10-15 15:27:36,925 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 343 transitions. Word has length 67 [2024-10-15 15:27:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:27:36,925 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 343 transitions. [2024-10-15 15:27:36,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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) [2024-10-15 15:27:36,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:27:36,926 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 343 transitions. [2024-10-15 15:27:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-15 15:27:36,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:27:36,927 INFO L215 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] [2024-10-15 15:27:36,946 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0