./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 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_mannadiv.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 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:38:11,720 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:38:11,782 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:38:11,786 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:38:11,786 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:38:11,810 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:38:11,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:38:11,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:38:11,813 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:38:11,813 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:38:11,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:38:11,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:38:11,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:38:11,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:38:11,814 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:38:11,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:38:11,814 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:38:11,815 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:38:11,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:38:11,818 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:38:11,818 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:38:11,819 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:38:11,819 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:38:11,819 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:38:11,819 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:38:11,820 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:38:11,822 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:38:11,822 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:38:11,823 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:38:11,823 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:38:11,823 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:38:11,823 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:38:11,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:38:11,823 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:38:11,823 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:38:11,824 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:38:11,824 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:38:11,824 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:38:11,824 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:38:11,824 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:38:11,824 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:38:11,825 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:38:11,825 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 -> 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 11:38:12,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:38:12,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:38:12,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:38:12,118 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:38:12,118 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:38:12,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-09-25 11:38:14,167 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:38:14,387 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:38:14,388 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-09-25 11:38:14,398 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a7315f8b9/91d492e75fe2467f98127d502bf8777d/FLAG244f15ef3 [2024-09-25 11:38:14,413 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a7315f8b9/91d492e75fe2467f98127d502bf8777d [2024-09-25 11:38:14,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:38:14,416 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:38:14,418 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:38:14,419 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:38:14,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:38:14,424 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,424 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1eac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14, skipping insertion in model container [2024-09-25 11:38:14,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,443 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:38:14,590 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_mannadiv.c[1105,1118] [2024-09-25 11:38:14,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:38:14,620 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:38:14,630 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_mannadiv.c[1105,1118] [2024-09-25 11:38:14,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:38:14,660 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:38:14,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14 WrapperNode [2024-09-25 11:38:14,661 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:38:14,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:38:14,662 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:38:14,663 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:38:14,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,678 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,688 INFO L138 Inliner]: procedures = 16, calls = 57, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:38:14,688 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:38:14,689 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:38:14,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:38:14,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:38:14,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,702 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,720 INFO L175 MemorySlicer]: Split 31 memory accesses to 6 slices as follows [2, 5, 5, 7, 5, 7]. 23 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 2, 1, 3, 1, 3]. [2024-09-25 11:38:14,721 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,721 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,726 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,731 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,736 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,737 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,739 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:38:14,740 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:38:14,742 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:38:14,743 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:38:14,743 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (1/1) ... [2024-09-25 11:38:14,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:38:14,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:14,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 11:38:14,775 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 11:38:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:38:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 11:38:14,811 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 11:38:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:38:14,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:38:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:38:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 11:38:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 11:38:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 11:38:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 11:38:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 11:38:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 11:38:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 11:38:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 11:38:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 11:38:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 11:38:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 11:38:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 11:38:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:38:14,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:38:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_42_0 [2024-09-25 11:38:14,814 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_42_0 [2024-09-25 11:38:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:38:14,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:38:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 11:38:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 11:38:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 11:38:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 11:38:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 11:38:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 11:38:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:38:14,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:38:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 11:38:14,904 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:38:14,905 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:38:15,052 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-25 11:38:15,052 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:38:15,079 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:38:15,083 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 11:38:15,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:38:15 BoogieIcfgContainer [2024-09-25 11:38:15,084 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:38:15,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:38:15,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:38:15,088 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:38:15,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:38:14" (1/3) ... [2024-09-25 11:38:15,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ad9c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:38:15, skipping insertion in model container [2024-09-25 11:38:15,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:14" (2/3) ... [2024-09-25 11:38:15,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ad9c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:38:15, skipping insertion in model container [2024-09-25 11:38:15,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:38:15" (3/3) ... [2024-09-25 11:38:15,093 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_mannadiv.c [2024-09-25 11:38:15,119 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:38:15,119 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:38:15,171 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:38:15,176 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@16df3dec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:38:15,176 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:38:15,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 11:38:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 11:38:15,184 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:15,185 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:38:15,185 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:15,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1619877398, now seen corresponding path program 1 times [2024-09-25 11:38:15,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:15,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829974644] [2024-09-25 11:38:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:15,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:15,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:38:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:15,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:38:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:15,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:38:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:38:15,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:15,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829974644] [2024-09-25 11:38:15,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829974644] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:38:15,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:38:15,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 11:38:15,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457282768] [2024-09-25 11:38:15,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:15,398 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 11:38:15,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:15,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 11:38:15,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 11:38:15,414 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-25 11:38:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:15,442 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2024-09-25 11:38:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 11:38:15,444 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-25 11:38:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:15,448 INFO L225 Difference]: With dead ends: 64 [2024-09-25 11:38:15,449 INFO L226 Difference]: Without dead ends: 31 [2024-09-25 11:38:15,452 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 11:38:15,455 INFO L434 NwaCegarLoop]: 37 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, 37 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:15,456 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:38:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-25 11:38:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-25 11:38:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 11:38:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-25 11:38:15,486 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2024-09-25 11:38:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:15,487 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-25 11:38:15,487 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-25 11:38:15,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-25 11:38:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 11:38:15,491 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:15,491 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:38:15,491 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:38:15,491 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:15,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1787806574, now seen corresponding path program 1 times [2024-09-25 11:38:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:15,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415299314] [2024-09-25 11:38:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:15,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:15,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376932236] [2024-09-25 11:38:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:15,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:15,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:15,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:15,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 11:38:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:15,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-25 11:38:15,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:15,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:15,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:15,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:38:15,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:15,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:15,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-25 11:38:15,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:38:15,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-25 11:38:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:38:15,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:38:15,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:15,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415299314] [2024-09-25 11:38:15,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:15,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376932236] [2024-09-25 11:38:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376932236] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:38:15,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:38:15,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 11:38:15,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315512528] [2024-09-25 11:38:15,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:15,922 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:38:15,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:15,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:38:15,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:38:15,924 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-25 11:38:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:16,085 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-09-25 11:38:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:38:16,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-25 11:38:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:16,087 INFO L225 Difference]: With dead ends: 46 [2024-09-25 11:38:16,087 INFO L226 Difference]: Without dead ends: 44 [2024-09-25 11:38:16,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:38:16,088 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:16,088 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:38:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-25 11:38:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-09-25 11:38:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 11:38:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-09-25 11:38:16,101 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 24 [2024-09-25 11:38:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:16,101 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-09-25 11:38:16,102 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-25 11:38:16,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-09-25 11:38:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-25 11:38:16,103 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:16,103 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:38:16,117 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 11:38:16,307 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:16,308 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:16,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1422973788, now seen corresponding path program 1 times [2024-09-25 11:38:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:16,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144780281] [2024-09-25 11:38:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:16,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149137312] [2024-09-25 11:38:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:16,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:16,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:16,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:16,367 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 11:38:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:16,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-25 11:38:16,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:16,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:16,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:38:16,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:16,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:16,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-25 11:38:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:38:16,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:38:16,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:16,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144780281] [2024-09-25 11:38:16,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:16,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149137312] [2024-09-25 11:38:16,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149137312] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:38:16,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:38:16,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-25 11:38:16,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110432715] [2024-09-25 11:38:16,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:16,753 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 11:38:16,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:16,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 11:38:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:38:16,755 INFO L87 Difference]: Start difference. First operand 42 states and 47 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 11:38:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:16,986 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2024-09-25 11:38:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 11:38:16,986 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, (7), 3 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 34 [2024-09-25 11:38:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:16,988 INFO L225 Difference]: With dead ends: 52 [2024-09-25 11:38:16,988 INFO L226 Difference]: Without dead ends: 42 [2024-09-25 11:38:16,989 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-09-25 11:38:16,989 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:16,990 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:38:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-25 11:38:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-25 11:38:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 11:38:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-09-25 11:38:16,997 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2024-09-25 11:38:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:16,997 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-09-25 11:38:16,997 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 11:38:16,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-09-25 11:38:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-25 11:38:16,998 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:16,998 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-25 11:38:17,013 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 11:38:17,202 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:17,203 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:17,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:17,203 INFO L85 PathProgramCache]: Analyzing trace with hash 480719411, now seen corresponding path program 1 times [2024-09-25 11:38:17,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:17,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71950609] [2024-09-25 11:38:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:17,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:17,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492176149] [2024-09-25 11:38:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:17,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:17,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:17,250 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:17,252 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 11:38:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:17,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-09-25 11:38:17,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:17,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:17,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:17,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:17,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:17,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:38:17,517 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 29 treesize of output 17 [2024-09-25 11:38:17,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:38:17,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:38:17,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 11:38:17,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 11:38:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:38:17,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:38:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:38:17,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71950609] [2024-09-25 11:38:17,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492176149] [2024-09-25 11:38:17,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492176149] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:38:17,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:38:17,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-09-25 11:38:17,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103280370] [2024-09-25 11:38:17,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:38:17,949 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 11:38:17,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:17,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 11:38:17,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-09-25 11:38:17,950 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 11:38:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:18,512 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-09-25 11:38:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 11:38:18,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-09-25 11:38:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:18,514 INFO L225 Difference]: With dead ends: 63 [2024-09-25 11:38:18,514 INFO L226 Difference]: Without dead ends: 59 [2024-09-25 11:38:18,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-09-25 11:38:18,516 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:18,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 244 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 11:38:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-25 11:38:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2024-09-25 11:38:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-25 11:38:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-09-25 11:38:18,536 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 35 [2024-09-25 11:38:18,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:18,537 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-09-25 11:38:18,537 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 11:38:18,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-09-25 11:38:18,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 11:38:18,538 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:18,539 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 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] [2024-09-25 11:38:18,553 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 11:38:18,739 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:18,740 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:18,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash 474321093, now seen corresponding path program 1 times [2024-09-25 11:38:18,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:18,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637926608] [2024-09-25 11:38:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:18,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:18,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496078185] [2024-09-25 11:38:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:18,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:18,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:18,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:18,789 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 11:38:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:18,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-09-25 11:38:18,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:18,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:18,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:38:18,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:18,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:18,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:19,439 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 13 treesize of output 9 [2024-09-25 11:38:19,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:38:19,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:38:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 11:38:19,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:38:20,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637926608] [2024-09-25 11:38:20,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:20,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496078185] [2024-09-25 11:38:20,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496078185] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:38:20,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:38:20,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-25 11:38:20,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596615633] [2024-09-25 11:38:20,580 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:38:20,581 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:38:20,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:20,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:38:20,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2024-09-25 11:38:20,582 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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) [2024-09-25 11:38:24,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:38:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:25,323 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2024-09-25 11:38:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 11:38:25,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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 47 [2024-09-25 11:38:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:25,325 INFO L225 Difference]: With dead ends: 68 [2024-09-25 11:38:25,325 INFO L226 Difference]: Without dead ends: 58 [2024-09-25 11:38:25,325 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 11:38:25,326 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:25,326 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 129 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-09-25 11:38:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-25 11:38:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-09-25 11:38:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 12 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-25 11:38:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2024-09-25 11:38:25,361 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 47 [2024-09-25 11:38:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:25,362 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2024-09-25 11:38:25,362 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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) [2024-09-25 11:38:25,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:25,362 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2024-09-25 11:38:25,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 11:38:25,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:25,365 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 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] [2024-09-25 11:38:25,381 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-25 11:38:25,565 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:25,565 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:25,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash -343327357, now seen corresponding path program 1 times [2024-09-25 11:38:25,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:25,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500644573] [2024-09-25 11:38:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:25,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:25,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789735004] [2024-09-25 11:38:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:25,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:25,612 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 11:38:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:25,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-25 11:38:25,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:25,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:25,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:38:25,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:25,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:25,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:30,508 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 20 treesize of output 16 [2024-09-25 11:38:30,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:38:30,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-25 11:38:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-25 11:38:30,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:38:31,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:31,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500644573] [2024-09-25 11:38:31,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:31,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789735004] [2024-09-25 11:38:31,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789735004] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:38:31,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:38:31,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-25 11:38:31,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663319378] [2024-09-25 11:38:31,278 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:38:31,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 11:38:31,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:31,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 11:38:31,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=366, Unknown=1, NotChecked=0, Total=420 [2024-09-25 11:38:31,279 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-25 11:38:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:35,883 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2024-09-25 11:38:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 11:38:35,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (9), 3 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 47 [2024-09-25 11:38:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:35,885 INFO L225 Difference]: With dead ends: 66 [2024-09-25 11:38:35,885 INFO L226 Difference]: Without dead ends: 60 [2024-09-25 11:38:35,886 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=110, Invalid=758, Unknown=2, NotChecked=0, Total=870 [2024-09-25 11:38:35,886 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:35,887 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 11:38:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-25 11:38:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2024-09-25 11:38:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-25 11:38:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-09-25 11:38:35,902 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 47 [2024-09-25 11:38:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:35,902 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-09-25 11:38:35,902 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-25 11:38:35,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-09-25 11:38:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-25 11:38:35,904 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:35,904 INFO L216 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] [2024-09-25 11:38:35,918 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 11:38:36,107 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 11:38:36,108 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:36,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1442337340, now seen corresponding path program 2 times [2024-09-25 11:38:36,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:36,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482489842] [2024-09-25 11:38:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:36,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:36,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132854027] [2024-09-25 11:38:36,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:38:36,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:36,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:36,145 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:36,148 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 11:38:36,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:38:36,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:38:36,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-09-25 11:38:36,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:36,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:36,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:36,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:38:36,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:36,642 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 11 treesize of output 7 [2024-09-25 11:38:37,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 11:38:37,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 11:38:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 11:38:37,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:38:38,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:38:38,628 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 50 treesize of output 53 [2024-09-25 11:38:38,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2024-09-25 11:38:38,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:38,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482489842] [2024-09-25 11:38:38,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:38,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132854027] [2024-09-25 11:38:38,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132854027] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:38:38,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:38:38,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-25 11:38:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658446771] [2024-09-25 11:38:38,800 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:38:38,800 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:38:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:38:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:38:38,802 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-25 11:38:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:39,751 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2024-09-25 11:38:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 11:38:39,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 60 [2024-09-25 11:38:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:39,752 INFO L225 Difference]: With dead ends: 68 [2024-09-25 11:38:39,752 INFO L226 Difference]: Without dead ends: 62 [2024-09-25 11:38:39,752 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 11:38:39,754 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:39,754 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 142 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 11:38:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-25 11:38:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-09-25 11:38:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-25 11:38:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-09-25 11:38:39,781 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 60 [2024-09-25 11:38:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:39,781 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-09-25 11:38:39,782 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-25 11:38:39,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-09-25 11:38:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-25 11:38:39,783 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:39,783 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:38:39,805 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 11:38:39,983 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:39,984 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:39,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:39,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1661192058, now seen corresponding path program 1 times [2024-09-25 11:38:39,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:39,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419478721] [2024-09-25 11:38:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:39,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:40,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:38:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:40,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:38:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:40,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:38:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:40,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 11:38:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:40,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:38:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:40,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:38:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:41,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:38:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:41,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:38:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:41,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:38:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-25 11:38:41,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:41,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419478721] [2024-09-25 11:38:41,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419478721] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:38:41,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123670024] [2024-09-25 11:38:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:41,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:41,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:41,738 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:41,739 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 11:38:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:41,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-25 11:38:41,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:41,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:41,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:41,998 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 13 treesize of output 9 [2024-09-25 11:38:42,080 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 14 treesize of output 10 [2024-09-25 11:38:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 11:38:42,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:38:42,417 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 13 treesize of output 9 [2024-09-25 11:38:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 11:38:42,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123670024] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:38:42,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:38:42,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 12] total 37 [2024-09-25 11:38:42,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047705152] [2024-09-25 11:38:42,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:38:42,711 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-25 11:38:42,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-25 11:38:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 11:38:42,713 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 37 states, 28 states have (on average 2.107142857142857) internal successors, (59), 33 states have internal predecessors, (59), 16 states have call successors, (21), 6 states have call predecessors, (21), 7 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-25 11:38:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:43,792 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2024-09-25 11:38:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 11:38:43,793 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 28 states have (on average 2.107142857142857) internal successors, (59), 33 states have internal predecessors, (59), 16 states have call successors, (21), 6 states have call predecessors, (21), 7 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) Word has length 60 [2024-09-25 11:38:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:43,794 INFO L225 Difference]: With dead ends: 80 [2024-09-25 11:38:43,794 INFO L226 Difference]: Without dead ends: 72 [2024-09-25 11:38:43,795 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=2243, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 11:38:43,795 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:43,796 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 181 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 11:38:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-25 11:38:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2024-09-25 11:38:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (23), 13 states have call predecessors, (23), 10 states have call successors, (23) [2024-09-25 11:38:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-09-25 11:38:43,827 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 60 [2024-09-25 11:38:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:43,828 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-09-25 11:38:43,828 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 28 states have (on average 2.107142857142857) internal successors, (59), 33 states have internal predecessors, (59), 16 states have call successors, (21), 6 states have call predecessors, (21), 7 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-25 11:38:43,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-09-25 11:38:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-25 11:38:43,834 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:43,834 INFO L216 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] [2024-09-25 11:38:43,847 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 11:38:44,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:44,039 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:44,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:44,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1588805500, now seen corresponding path program 2 times [2024-09-25 11:38:44,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:44,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50439735] [2024-09-25 11:38:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:44,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:44,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357625758] [2024-09-25 11:38:44,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:38:44,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:44,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:44,069 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:44,070 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 11:38:44,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:38:44,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:38:44,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-09-25 11:38:44,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:44,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:44,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:44,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:44,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:44,221 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 [2024-09-25 11:38:44,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:44,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-25 11:38:44,512 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 24 treesize of output 20 [2024-09-25 11:38:44,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:38:44,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 11:38:44,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 11:38:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-25 11:38:44,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:19,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50439735] [2024-09-25 11:39:19,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357625758] [2024-09-25 11:39:19,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357625758] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:19,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:19,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-25 11:39:19,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779537636] [2024-09-25 11:39:19,494 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:19,494 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:39:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:19,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:39:19,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=620, Unknown=5, NotChecked=0, Total=702 [2024-09-25 11:39:19,495 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 21 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-25 11:39:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:20,564 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2024-09-25 11:39:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 11:39:20,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2024-09-25 11:39:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:20,566 INFO L225 Difference]: With dead ends: 76 [2024-09-25 11:39:20,566 INFO L226 Difference]: Without dead ends: 70 [2024-09-25 11:39:20,566 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=157, Invalid=1170, Unknown=5, NotChecked=0, Total=1332 [2024-09-25 11:39:20,568 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:20,568 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 113 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 11:39:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-25 11:39:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-09-25 11:39:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 12 states have call successors, (12), 10 states have call predecessors, (12), 13 states have return successors, (25), 14 states have call predecessors, (25), 10 states have call successors, (25) [2024-09-25 11:39:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2024-09-25 11:39:20,592 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 60 [2024-09-25 11:39:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:20,593 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2024-09-25 11:39:20,593 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-25 11:39:20,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2024-09-25 11:39:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 11:39:20,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:20,594 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-25 11:39:20,607 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:20,798 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:20,799 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:20,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:20,799 INFO L85 PathProgramCache]: Analyzing trace with hash -742771557, now seen corresponding path program 3 times [2024-09-25 11:39:20,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:20,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469607790] [2024-09-25 11:39:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:20,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:20,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126807286] [2024-09-25 11:39:20,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:39:20,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:20,830 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:20,831 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 11:39:20,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 11:39:20,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:39:20,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-09-25 11:39:20,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:21,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:21,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:21,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:39:21,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:21,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:39:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-09-25 11:39:21,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:22,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:22,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469607790] [2024-09-25 11:39:22,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:22,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126807286] [2024-09-25 11:39:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126807286] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:22,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:22,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-25 11:39:22,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395813275] [2024-09-25 11:39:22,628 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:22,629 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 11:39:22,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:22,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 11:39:22,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:39:22,629 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 20 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-25 11:39:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:23,362 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2024-09-25 11:39:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 11:39:23,362 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 73 [2024-09-25 11:39:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:23,364 INFO L225 Difference]: With dead ends: 78 [2024-09-25 11:39:23,364 INFO L226 Difference]: Without dead ends: 72 [2024-09-25 11:39:23,365 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 11:39:23,365 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:23,365 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 150 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 11:39:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-25 11:39:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-09-25 11:39:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 10 states have call predecessors, (12), 14 states have return successors, (27), 15 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-25 11:39:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-09-25 11:39:23,404 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 73 [2024-09-25 11:39:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:23,404 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-09-25 11:39:23,404 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-25 11:39:23,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-09-25 11:39:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-25 11:39:23,408 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:23,408 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:39:23,421 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 11:39:23,609 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 11:39:23,609 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:23,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1760672172, now seen corresponding path program 4 times [2024-09-25 11:39:23,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:23,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053472363] [2024-09-25 11:39:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:23,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:23,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895959436] [2024-09-25 11:39:23,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 11:39:23,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:23,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:23,652 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:23,656 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 11:39:23,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 11:39:23,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:39:23,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-09-25 11:39:23,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:23,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:23,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:39:23,836 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 11 treesize of output 7 [2024-09-25 11:39:23,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:24,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:39:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-09-25 11:39:24,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:25,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:25,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053472363] [2024-09-25 11:39:25,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:25,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895959436] [2024-09-25 11:39:25,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895959436] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:25,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:25,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-25 11:39:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124395924] [2024-09-25 11:39:25,902 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:25,903 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 11:39:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 11:39:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-09-25 11:39:25,904 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-25 11:39:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:26,534 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-09-25 11:39:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 11:39:26,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 86 [2024-09-25 11:39:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:26,536 INFO L225 Difference]: With dead ends: 80 [2024-09-25 11:39:26,536 INFO L226 Difference]: Without dead ends: 74 [2024-09-25 11:39:26,536 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2024-09-25 11:39:26,537 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:26,537 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 133 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 11:39:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-25 11:39:26,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2024-09-25 11:39:26,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 12 states have call successors, (12), 10 states have call predecessors, (12), 15 states have return successors, (29), 16 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-25 11:39:26,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-09-25 11:39:26,562 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 86 [2024-09-25 11:39:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:26,562 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-09-25 11:39:26,563 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-25 11:39:26,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-09-25 11:39:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-25 11:39:26,563 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:26,564 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:39:26,577 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 11:39:26,767 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 11:39:26,768 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:26,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:26,768 INFO L85 PathProgramCache]: Analyzing trace with hash 104908723, now seen corresponding path program 5 times [2024-09-25 11:39:26,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:26,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195575189] [2024-09-25 11:39:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:26,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:26,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132954408] [2024-09-25 11:39:26,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 11:39:26,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:26,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:26,805 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:26,809 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 11:39:27,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-25 11:39:27,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:39:27,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 187 conjuncts are in the unsatisfiable core [2024-09-25 11:39:27,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:27,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:39:27,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:27,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:27,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:28,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:39:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 20 proven. 61 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-25 11:39:28,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:29,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:29,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195575189] [2024-09-25 11:39:29,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:29,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132954408] [2024-09-25 11:39:29,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132954408] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:29,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:29,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-25 11:39:29,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364551513] [2024-09-25 11:39:29,840 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:29,841 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 11:39:29,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 11:39:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2024-09-25 11:39:29,842 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 11:39:30,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:30,725 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2024-09-25 11:39:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 11:39:30,726 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) Word has length 99 [2024-09-25 11:39:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:30,726 INFO L225 Difference]: With dead ends: 82 [2024-09-25 11:39:30,727 INFO L226 Difference]: Without dead ends: 76 [2024-09-25 11:39:30,727 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 11:39:30,727 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:30,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 191 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 11:39:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-25 11:39:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-25 11:39:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 12 states have call successors, (12), 10 states have call predecessors, (12), 16 states have return successors, (31), 17 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-25 11:39:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2024-09-25 11:39:30,773 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 99 [2024-09-25 11:39:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:30,774 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2024-09-25 11:39:30,774 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 11:39:30,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2024-09-25 11:39:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 11:39:30,775 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:30,775 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-25 11:39:30,789 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:30,979 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:30,980 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:30,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1693025251, now seen corresponding path program 3 times [2024-09-25 11:39:30,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:30,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053875479] [2024-09-25 11:39:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:30,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:30,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255354615] [2024-09-25 11:39:30,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:39:30,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:30,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:31,001 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:31,002 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 11:39:31,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 11:39:31,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:39:31,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-09-25 11:39:31,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:31,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:31,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:31,287 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 11 treesize of output 7 [2024-09-25 11:39:31,292 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 15 treesize of output 11 [2024-09-25 11:39:31,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:31,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:31,588 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 13 treesize of output 9 [2024-09-25 11:39:31,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:32,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:39:32,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-25 11:39:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-25 11:39:32,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:35,024 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 86 treesize of output 82 [2024-09-25 11:39:35,046 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 86 treesize of output 82 [2024-09-25 11:39:35,083 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 86 treesize of output 82 [2024-09-25 11:39:35,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:35,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053875479] [2024-09-25 11:39:35,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:35,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255354615] [2024-09-25 11:39:35,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255354615] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:35,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:35,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-25 11:39:35,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527084157] [2024-09-25 11:39:35,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:35,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 11:39:35,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 11:39:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2024-09-25 11:39:35,302 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-25 11:39:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:36,525 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2024-09-25 11:39:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 11:39:36,525 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 73 [2024-09-25 11:39:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:36,526 INFO L225 Difference]: With dead ends: 82 [2024-09-25 11:39:36,526 INFO L226 Difference]: Without dead ends: 76 [2024-09-25 11:39:36,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 11:39:36,527 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:36,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 173 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 11:39:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-25 11:39:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-09-25 11:39:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 12 states have call successors, (12), 10 states have call predecessors, (12), 17 states have return successors, (33), 18 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-25 11:39:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2024-09-25 11:39:36,570 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 73 [2024-09-25 11:39:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:36,570 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2024-09-25 11:39:36,571 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-25 11:39:36,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2024-09-25 11:39:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 11:39:36,573 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:36,573 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:39:36,590 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-25 11:39:36,774 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 11:39:36,774 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:36,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:36,775 INFO L85 PathProgramCache]: Analyzing trace with hash 235247451, now seen corresponding path program 2 times [2024-09-25 11:39:36,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:36,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888212441] [2024-09-25 11:39:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:36,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:37,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:39:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:37,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:39:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:37,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:39:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:37,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 11:39:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:37,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:37,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:39:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:37,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:37,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:39:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:38,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:38,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:39:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:38,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-25 11:39:38,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:38,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888212441] [2024-09-25 11:39:38,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888212441] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:38,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275315607] [2024-09-25 11:39:38,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:39:38,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:38,324 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:38,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 11:39:38,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:39:38,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:39:38,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-25 11:39:38,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:38,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:38,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:38,867 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 13 treesize of output 9 [2024-09-25 11:39:39,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-25 11:39:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-09-25 11:39:39,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:39,913 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 13 treesize of output 9 [2024-09-25 11:39:40,072 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 13 treesize of output 9 [2024-09-25 11:39:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 11:39:40,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275315607] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:39:40,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:39:40,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 16] total 38 [2024-09-25 11:39:40,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285570886] [2024-09-25 11:39:40,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:40,603 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-25 11:39:40,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-25 11:39:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 11:39:40,605 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 38 states, 26 states have (on average 2.576923076923077) internal successors, (67), 33 states have internal predecessors, (67), 20 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (22), 15 states have call predecessors, (22), 19 states have call successors, (22) [2024-09-25 11:39:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:43,469 INFO L93 Difference]: Finished difference Result 176 states and 251 transitions. [2024-09-25 11:39:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-25 11:39:43,470 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 26 states have (on average 2.576923076923077) internal successors, (67), 33 states have internal predecessors, (67), 20 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (22), 15 states have call predecessors, (22), 19 states have call successors, (22) Word has length 73 [2024-09-25 11:39:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:43,473 INFO L225 Difference]: With dead ends: 176 [2024-09-25 11:39:43,473 INFO L226 Difference]: Without dead ends: 122 [2024-09-25 11:39:43,475 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=919, Invalid=4933, Unknown=0, NotChecked=0, Total=5852 [2024-09-25 11:39:43,477 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:43,477 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 302 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-25 11:39:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-25 11:39:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2024-09-25 11:39:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.103448275862069) internal successors, (64), 61 states have internal predecessors, (64), 16 states have call successors, (16), 12 states have call predecessors, (16), 19 states have return successors, (32), 20 states have call predecessors, (32), 14 states have call successors, (32) [2024-09-25 11:39:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2024-09-25 11:39:43,512 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 73 [2024-09-25 11:39:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:43,513 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2024-09-25 11:39:43,515 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 26 states have (on average 2.576923076923077) internal successors, (67), 33 states have internal predecessors, (67), 20 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (22), 15 states have call predecessors, (22), 19 states have call successors, (22) [2024-09-25 11:39:43,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2024-09-25 11:39:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-25 11:39:43,515 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:43,515 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:39:43,540 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:43,716 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 11:39:43,716 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:43,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:43,717 INFO L85 PathProgramCache]: Analyzing trace with hash 595133078, now seen corresponding path program 3 times [2024-09-25 11:39:43,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:43,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374009931] [2024-09-25 11:39:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:43,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:44,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:39:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:44,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:39:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:44,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:39:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:44,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 11:39:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:44,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:44,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:39:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:45,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:45,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:39:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:45,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:45,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:39:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:46,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:46,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:39:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:46,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 23 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 11:39:46,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:46,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374009931] [2024-09-25 11:39:46,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374009931] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:46,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905559019] [2024-09-25 11:39:46,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:39:46,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:46,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:46,399 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:46,400 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 11:39:46,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-25 11:39:46,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:39:46,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-25 11:39:46,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:46,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:46,895 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 13 treesize of output 9 [2024-09-25 11:39:47,170 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 14 treesize of output 10 [2024-09-25 11:39:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-25 11:39:47,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:47,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2024-09-25 11:39:47,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2024-09-25 11:39:48,410 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 14 treesize of output 10 [2024-09-25 11:39:48,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2024-09-25 11:39:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 74 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-25 11:39:49,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905559019] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:39:49,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:39:49,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 20] total 53 [2024-09-25 11:39:49,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120127257] [2024-09-25 11:39:49,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:49,061 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-25 11:39:49,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:49,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-25 11:39:49,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2512, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 11:39:49,063 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 53 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 47 states have internal predecessors, (88), 28 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (31), 22 states have call predecessors, (31), 27 states have call successors, (31) [2024-09-25 11:39:53,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:53,098 INFO L93 Difference]: Finished difference Result 139 states and 171 transitions. [2024-09-25 11:39:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-25 11:39:53,098 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 47 states have internal predecessors, (88), 28 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (31), 22 states have call predecessors, (31), 27 states have call successors, (31) Word has length 86 [2024-09-25 11:39:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:53,099 INFO L225 Difference]: With dead ends: 139 [2024-09-25 11:39:53,100 INFO L226 Difference]: Without dead ends: 127 [2024-09-25 11:39:53,101 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1132, Invalid=7988, Unknown=0, NotChecked=0, Total=9120 [2024-09-25 11:39:53,102 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 103 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:53,102 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 469 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-25 11:39:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-25 11:39:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2024-09-25 11:39:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 66 states have internal predecessors, (69), 16 states have call successors, (16), 12 states have call predecessors, (16), 24 states have return successors, (40), 25 states have call predecessors, (40), 14 states have call successors, (40) [2024-09-25 11:39:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2024-09-25 11:39:53,146 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 86 [2024-09-25 11:39:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:53,146 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2024-09-25 11:39:53,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 47 states have internal predecessors, (88), 28 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (31), 22 states have call predecessors, (31), 27 states have call successors, (31) [2024-09-25 11:39:53,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2024-09-25 11:39:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 11:39:53,147 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:53,147 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:39:53,163 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:53,348 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 11:39:53,348 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:53,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:53,348 INFO L85 PathProgramCache]: Analyzing trace with hash -608758051, now seen corresponding path program 4 times [2024-09-25 11:39:53,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:53,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9026820] [2024-09-25 11:39:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:53,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:53,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689027097] [2024-09-25 11:39:53,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 11:39:53,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:53,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:53,367 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:53,369 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 11:39:53,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 11:39:53,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:39:53,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 189 conjuncts are in the unsatisfiable core [2024-09-25 11:39:53,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:53,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:53,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:39:53,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:53,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:54,261 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 13 treesize of output 9 [2024-09-25 11:39:54,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:39:54,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:39:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-25 11:39:54,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:56,105 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 26 [2024-09-25 11:39:57,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:39:57,090 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 147 treesize of output 146 [2024-09-25 11:39:57,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:57,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9026820] [2024-09-25 11:39:57,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:57,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689027097] [2024-09-25 11:39:57,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689027097] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:57,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:57,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-25 11:39:57,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717286246] [2024-09-25 11:39:57,407 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:57,407 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 11:39:57,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:57,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 11:39:57,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2024-09-25 11:39:57,408 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-25 11:39:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:58,547 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2024-09-25 11:39:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 11:39:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 73 [2024-09-25 11:39:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:58,549 INFO L225 Difference]: With dead ends: 118 [2024-09-25 11:39:58,549 INFO L226 Difference]: Without dead ends: 112 [2024-09-25 11:39:58,549 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2024-09-25 11:39:58,550 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:58,550 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 142 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 11:39:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-25 11:39:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2024-09-25 11:39:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 66 states have internal predecessors, (69), 16 states have call successors, (16), 12 states have call predecessors, (16), 24 states have return successors, (40), 25 states have call predecessors, (40), 14 states have call successors, (40) [2024-09-25 11:39:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2024-09-25 11:39:58,603 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 73 [2024-09-25 11:39:58,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:58,603 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2024-09-25 11:39:58,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-25 11:39:58,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:58,603 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2024-09-25 11:39:58,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 11:39:58,604 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:58,604 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:39:58,618 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:58,808 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 11:39:58,809 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:58,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:58,810 INFO L85 PathProgramCache]: Analyzing trace with hash 101233945, now seen corresponding path program 5 times [2024-09-25 11:39:58,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:58,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200106191] [2024-09-25 11:39:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:58,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:58,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083474270] [2024-09-25 11:39:58,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 11:39:58,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:58,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:58,842 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:58,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 11:39:59,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-25 11:39:59,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:39:59,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 208 conjuncts are in the unsatisfiable core [2024-09-25 11:39:59,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:59,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:59,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:39:59,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:59,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:59,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:40:00,092 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 13 treesize of output 9 [2024-09-25 11:40:01,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:40:01,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:40:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-25 11:40:01,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:40:03,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:40:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200106191] [2024-09-25 11:40:03,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:40:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083474270] [2024-09-25 11:40:03,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083474270] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:40:03,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:40:03,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2024-09-25 11:40:03,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430854345] [2024-09-25 11:40:03,756 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:40:03,756 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 11:40:03,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:40:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 11:40:03,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 11:40:03,757 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 28 states have internal predecessors, (40), 11 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-25 11:40:07,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:40:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:40:09,709 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2024-09-25 11:40:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 11:40:09,710 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.6) internal successors, (40), 28 states have internal predecessors, (40), 11 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 73 [2024-09-25 11:40:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:40:09,711 INFO L225 Difference]: With dead ends: 118 [2024-09-25 11:40:09,711 INFO L226 Difference]: Without dead ends: 112 [2024-09-25 11:40:09,712 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 11:40:09,712 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-09-25 11:40:09,712 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 202 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 834 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-09-25 11:40:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-25 11:40:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2024-09-25 11:40:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 68 states have internal predecessors, (71), 16 states have call successors, (16), 12 states have call predecessors, (16), 26 states have return successors, (43), 27 states have call predecessors, (43), 14 states have call successors, (43) [2024-09-25 11:40:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2024-09-25 11:40:09,762 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 73 [2024-09-25 11:40:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:40:09,762 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2024-09-25 11:40:09,762 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.6) internal successors, (40), 28 states have internal predecessors, (40), 11 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-25 11:40:09,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2024-09-25 11:40:09,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-25 11:40:09,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:40:09,763 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:40:09,789 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-25 11:40:09,963 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:40:09,964 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:40:09,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash 585988981, now seen corresponding path program 6 times [2024-09-25 11:40:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:40:09,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958400735] [2024-09-25 11:40:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:40:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:40:10,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982838103] [2024-09-25 11:40:10,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 11:40:10,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:40:10,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:40:10,004 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:40:10,012 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 11:40:10,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 11:40:10,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:40:10,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 275 conjuncts are in the unsatisfiable core [2024-09-25 11:40:10,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:40:10,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:40:10,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:40:10,772 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 [2024-09-25 11:40:11,325 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 46 treesize of output 34 [2024-09-25 11:40:11,330 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 36 [2024-09-25 11:40:11,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-25 11:40:11,393 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 24 treesize of output 20 [2024-09-25 11:40:11,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-25 11:40:11,689 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 31 treesize of output 23 [2024-09-25 11:40:11,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-25 11:40:11,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-25 11:40:11,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:40:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 71 proven. 50 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-25 11:40:11,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:40:16,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:40:16,570 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 127 treesize of output 126 [2024-09-25 11:40:16,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:40:16,603 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 168 treesize of output 159 [2024-09-25 11:40:16,708 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 8 treesize of output 4 [2024-09-25 11:40:16,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:40:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958400735] [2024-09-25 11:40:16,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:40:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982838103] [2024-09-25 11:40:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982838103] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:40:16,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:40:16,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-25 11:40:16,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239697683] [2024-09-25 11:40:16,820 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:40:16,820 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:40:16,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:40:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:40:16,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-09-25 11:40:16,822 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 8 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 11:40:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:40:17,790 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2024-09-25 11:40:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 11:40:17,791 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 8 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 99 [2024-09-25 11:40:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:40:17,791 INFO L225 Difference]: With dead ends: 116 [2024-09-25 11:40:17,791 INFO L226 Difference]: Without dead ends: 0 [2024-09-25 11:40:17,792 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2024-09-25 11:40:17,793 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:40:17,793 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 106 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 11:40:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-25 11:40:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-25 11:40:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-25 11:40:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-25 11:40:17,794 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2024-09-25 11:40:17,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:40:17,794 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-25 11:40:17,794 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 8 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 11:40:17,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-25 11:40:17,794 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-25 11:40:17,796 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-25 11:40:17,812 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-25 11:40:18,000 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-25 11:40:18,003 INFO L408 BasicCegarLoop]: Path program histogram: [6, 5, 3, 1, 1, 1, 1] [2024-09-25 11:40:18,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-25 11:40:29,343 WARN L293 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 405 DAG size of output: 677 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-25 11:40:36,842 WARN L293 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 366 DAG size of output: 1108 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-25 11:40:42,689 WARN L293 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 403 DAG size of output: 628 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-25 11:40:52,423 WARN L293 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 405 DAG size of output: 677 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-25 11:41:00,065 WARN L293 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 366 DAG size of output: 1108 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-25 11:41:05,929 WARN L293 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 403 DAG size of output: 628 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-25 11:41:41,605 WARN L293 SmtUtils]: Spent 25.93s on a formula simplification. DAG size of input: 261 DAG size of output: 118 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter)