./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 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_cohendiv-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-25 00:14:08,562 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:14:08,629 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:14:08,633 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:14:08,634 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:14:08,661 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:14:08,661 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:14:08,662 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:14:08,663 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:14:08,664 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:14:08,665 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:14:08,665 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:14:08,666 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:14:08,666 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:14:08,668 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:14:08,669 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:14:08,669 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:14:08,669 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:14:08,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:14:08,670 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:14:08,670 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:14:08,674 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:14:08,674 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:14:08,674 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:14:08,674 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:14:08,675 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:14:08,675 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:14:08,675 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:14:08,675 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:14:08,676 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:14:08,676 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:14:08,676 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:14:08,677 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:14:08,677 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:14:08,677 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:14:08,677 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:14:08,678 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:14:08,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:14:08,678 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:14:08,678 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:14:08,678 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:14:08,679 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:14:08,679 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:14:08,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:14:08,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:14:08,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:14:08,985 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:14:08,986 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:14:08,987 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-09-25 00:14:10,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:14:10,663 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:14:10,663 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-09-25 00:14:10,670 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/585d44da9/76c64313cb194792be85312ec0af4c64/FLAGae10d7d6c [2024-09-25 00:14:10,683 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/585d44da9/76c64313cb194792be85312ec0af4c64 [2024-09-25 00:14:10,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:14:10,687 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:14:10,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:14:10,689 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:14:10,694 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:14:10,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:14:10" (1/1) ... [2024-09-25 00:14:10,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@130e8d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:10, skipping insertion in model container [2024-09-25 00:14:10,699 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:14:10" (1/1) ... [2024-09-25 00:14:10,721 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:14:10,886 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_cohendiv-ll.c[1136,1149] [2024-09-25 00:14:10,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:14:10,945 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:14:10,968 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_cohendiv-ll.c[1136,1149] [2024-09-25 00:14:10,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:14:11,007 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:14:11,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11 WrapperNode [2024-09-25 00:14:11,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:14:11,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:14:11,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:14:11,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:14:11,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,032 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:14:11,032 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:14:11,033 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:14:11,033 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:14:11,033 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:14:11,043 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,043 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,046 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,066 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [8, 2, 6, 10, 8, 10, 5]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0, 0, 0, 0]. The 12 writes are split as follows [3, 0, 2, 2, 3, 1, 1]. [2024-09-25 00:14:11,067 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,067 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,076 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,085 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:14:11,086 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:14:11,086 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:14:11,086 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:14:11,087 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (1/1) ... [2024-09-25 00:14:11,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:14:11,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:11,120 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 00:14:11,122 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 00:14:11,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:14:11,171 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 00:14:11,171 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 00:14:11,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:14:11,171 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:14:11,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:14:11,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 00:14:11,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 00:14:11,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 00:14:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 00:14:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 00:14:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-25 00:14:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 00:14:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2024-09-25 00:14:11,172 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2024-09-25 00:14:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2024-09-25 00:14:11,173 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2024-09-25 00:14:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 00:14:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 00:14:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 00:14:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 00:14:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 00:14:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 00:14:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-25 00:14:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:14:11,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:14:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:14:11,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:14:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 00:14:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 00:14:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 00:14:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 00:14:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 00:14:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 00:14:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-25 00:14:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 00:14:11,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 00:14:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 00:14:11,280 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:14:11,282 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:14:11,584 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-25 00:14:11,586 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:14:11,614 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:14:11,614 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 00:14:11,615 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:14:11 BoogieIcfgContainer [2024-09-25 00:14:11,615 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:14:11,617 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:14:11,618 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:14:11,621 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:14:11,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:14:10" (1/3) ... [2024-09-25 00:14:11,622 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e731879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:14:11, skipping insertion in model container [2024-09-25 00:14:11,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:11" (2/3) ... [2024-09-25 00:14:11,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e731879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:14:11, skipping insertion in model container [2024-09-25 00:14:11,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:14:11" (3/3) ... [2024-09-25 00:14:11,625 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2024-09-25 00:14:11,673 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:14:11,674 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 00:14:11,734 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:14:11,740 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;@10f62060, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:14:11,741 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 00:14:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 00:14:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-25 00:14:11,751 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:11,752 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:11,752 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:11,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1731301129, now seen corresponding path program 1 times [2024-09-25 00:14:11,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:11,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498856544] [2024-09-25 00:14:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:11,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:11,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205370727] [2024-09-25 00:14:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:11,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:11,971 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 00:14:11,972 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 00:14:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:12,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-25 00:14:12,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:12,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:12,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:14:12,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 00:14:12,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:12,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498856544] [2024-09-25 00:14:12,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:12,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205370727] [2024-09-25 00:14:12,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205370727] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:14:12,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:14:12,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 00:14:12,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309959418] [2024-09-25 00:14:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:12,305 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:14:12,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:12,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:14:12,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 00:14:12,338 INFO L87 Difference]: Start difference. First operand has 50 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-25 00:14:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:12,612 INFO L93 Difference]: Finished difference Result 108 states and 152 transitions. [2024-09-25 00:14:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:14:12,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-25 00:14:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:12,628 INFO L225 Difference]: With dead ends: 108 [2024-09-25 00:14:12,628 INFO L226 Difference]: Without dead ends: 61 [2024-09-25 00:14:12,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 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 00:14:12,638 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 15 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:12,639 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 310 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:14:12,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-25 00:14:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-09-25 00:14:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-25 00:14:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-09-25 00:14:12,683 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 18 [2024-09-25 00:14:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:12,684 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-09-25 00:14:12,684 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-25 00:14:12,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-09-25 00:14:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 00:14:12,686 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:12,686 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:12,701 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 00:14:12,890 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-25 00:14:12,891 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:12,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1578239580, now seen corresponding path program 1 times [2024-09-25 00:14:12,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:12,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511099062] [2024-09-25 00:14:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:12,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:12,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241900494] [2024-09-25 00:14:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:12,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:12,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:12,992 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 00:14:12,996 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 00:14:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:13,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-25 00:14:13,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:13,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:13,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:13,172 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 11 treesize of output 7 [2024-09-25 00:14:13,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:13,399 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 00:14:13,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-25 00:14:13,413 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 00:14:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:14:13,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:14:13,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:13,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511099062] [2024-09-25 00:14:13,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:13,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241900494] [2024-09-25 00:14:13,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241900494] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:13,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:14:13,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-25 00:14:13,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686247742] [2024-09-25 00:14:13,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:13,663 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:14:13,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:14:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-25 00:14:13,666 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-25 00:14:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:13,963 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-09-25 00:14:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:14:13,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-25 00:14:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:13,967 INFO L225 Difference]: With dead ends: 68 [2024-09-25 00:14:13,968 INFO L226 Difference]: Without dead ends: 66 [2024-09-25 00:14:13,969 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-25 00:14:13,971 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:13,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 277 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:14:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-25 00:14:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-25 00:14:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-25 00:14:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-09-25 00:14:14,007 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 24 [2024-09-25 00:14:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:14,008 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-09-25 00:14:14,008 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-25 00:14:14,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-09-25 00:14:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-25 00:14:14,010 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:14,010 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:14,029 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 00:14:14,210 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:14,211 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:14,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1582649267, now seen corresponding path program 1 times [2024-09-25 00:14:14,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:14,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779571887] [2024-09-25 00:14:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:14,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:14,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027863169] [2024-09-25 00:14:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:14,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:14,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:14,310 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 00:14:14,312 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 00:14:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:14,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-25 00:14:14,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:14,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:14,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:14:14,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:14:14,528 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 00:14:14,534 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 00:14:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:14:14,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 00:14:14,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:14,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779571887] [2024-09-25 00:14:14,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:14,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027863169] [2024-09-25 00:14:14,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027863169] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:14:14,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:14:14,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 00:14:14,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669533460] [2024-09-25 00:14:14,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:14,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:14:14,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:14,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:14:14,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 00:14:14,575 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-25 00:14:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:14,798 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2024-09-25 00:14:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:14:14,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-09-25 00:14:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:14,803 INFO L225 Difference]: With dead ends: 84 [2024-09-25 00:14:14,806 INFO L226 Difference]: Without dead ends: 82 [2024-09-25 00:14:14,806 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 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 00:14:14,809 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:14,809 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 266 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:14:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-25 00:14:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2024-09-25 00:14:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 51 states have internal predecessors, (53), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-25 00:14:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2024-09-25 00:14:14,836 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 34 [2024-09-25 00:14:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:14,837 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2024-09-25 00:14:14,837 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-25 00:14:14,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2024-09-25 00:14:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-25 00:14:14,840 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:14,840 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:14,860 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 00:14:15,040 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-25 00:14:15,041 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:15,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:15,041 INFO L85 PathProgramCache]: Analyzing trace with hash -372589770, now seen corresponding path program 1 times [2024-09-25 00:14:15,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:15,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500346128] [2024-09-25 00:14:15,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:15,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:15,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303870602] [2024-09-25 00:14:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:15,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:15,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:15,090 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 00:14:15,108 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 00:14:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:15,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-25 00:14:15,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:15,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:15,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:15,266 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 00:14:15,324 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 19 treesize of output 11 [2024-09-25 00:14:15,327 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 00:14:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:14:15,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 00:14:15,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:15,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500346128] [2024-09-25 00:14:15,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:15,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303870602] [2024-09-25 00:14:15,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303870602] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:14:15,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:14:15,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-25 00:14:15,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62856384] [2024-09-25 00:14:15,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:15,354 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 00:14:15,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:15,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 00:14:15,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-25 00:14:15,355 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 00:14:15,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:15,586 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2024-09-25 00:14:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 00:14:15,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 00:14:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:15,588 INFO L225 Difference]: With dead ends: 88 [2024-09-25 00:14:15,588 INFO L226 Difference]: Without dead ends: 78 [2024-09-25 00:14:15,588 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-25 00:14:15,589 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:15,589 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:14:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-25 00:14:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-25 00:14:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-25 00:14:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2024-09-25 00:14:15,605 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 34 [2024-09-25 00:14:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:15,605 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2024-09-25 00:14:15,605 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 00:14:15,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2024-09-25 00:14:15,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 00:14:15,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:15,607 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:15,625 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 00:14:15,811 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:15,812 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:15,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash 316523269, now seen corresponding path program 1 times [2024-09-25 00:14:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:15,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119583941] [2024-09-25 00:14:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:15,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:15,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589052584] [2024-09-25 00:14:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:15,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:15,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:15,899 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 00:14:15,900 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 00:14:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:16,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-25 00:14:16,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:16,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:16,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:16,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:16,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:14:16,352 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 00:14:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:14:16,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:14:16,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:16,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119583941] [2024-09-25 00:14:16,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:16,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589052584] [2024-09-25 00:14:16,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589052584] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:16,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:14:16,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2024-09-25 00:14:16,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419364552] [2024-09-25 00:14:16,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:16,572 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 00:14:16,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:16,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 00:14:16,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:14:16,574 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 00:14:16,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:16,853 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2024-09-25 00:14:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 00:14:16,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2024-09-25 00:14:16,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:16,855 INFO L225 Difference]: With dead ends: 111 [2024-09-25 00:14:16,855 INFO L226 Difference]: Without dead ends: 109 [2024-09-25 00:14:16,856 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-25 00:14:16,858 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 24 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:16,858 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 298 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:14:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-25 00:14:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2024-09-25 00:14:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2024-09-25 00:14:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2024-09-25 00:14:16,891 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 40 [2024-09-25 00:14:16,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:16,892 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2024-09-25 00:14:16,892 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 00:14:16,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2024-09-25 00:14:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 00:14:16,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:16,896 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:16,913 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-25 00:14:17,097 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:17,097 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:17,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:17,098 INFO L85 PathProgramCache]: Analyzing trace with hash -889408325, now seen corresponding path program 1 times [2024-09-25 00:14:17,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:17,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721872273] [2024-09-25 00:14:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:17,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:18,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:14:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:18,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:14:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:18,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 00:14:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:18,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 00:14:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:18,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 00:14:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:18,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 00:14:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 00:14:18,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:18,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721872273] [2024-09-25 00:14:18,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721872273] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:14:18,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:14:18,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-09-25 00:14:18,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167074557] [2024-09-25 00:14:18,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:18,267 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 00:14:18,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:18,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 00:14:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2024-09-25 00:14:18,269 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 00:14:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:18,707 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2024-09-25 00:14:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:14:18,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-09-25 00:14:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:18,709 INFO L225 Difference]: With dead ends: 114 [2024-09-25 00:14:18,709 INFO L226 Difference]: Without dead ends: 112 [2024-09-25 00:14:18,710 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-09-25 00:14:18,710 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:18,710 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 387 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:14:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-25 00:14:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-09-25 00:14:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2024-09-25 00:14:18,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2024-09-25 00:14:18,747 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 46 [2024-09-25 00:14:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:18,748 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2024-09-25 00:14:18,748 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 00:14:18,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2024-09-25 00:14:18,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-25 00:14:18,750 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:18,750 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:18,750 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-25 00:14:18,750 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:18,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:18,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1594102023, now seen corresponding path program 1 times [2024-09-25 00:14:18,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:18,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060387477] [2024-09-25 00:14:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:18,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:18,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987887205] [2024-09-25 00:14:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:18,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:18,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:18,809 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 00:14:18,811 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 00:14:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:18,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-25 00:14:18,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:18,969 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 15 treesize of output 1 [2024-09-25 00:14:18,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:18,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:19,205 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 00:14:23,260 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 00:14:23,264 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 00:14:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 00:14:23,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:23,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-09-25 00:14:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 00:14:23,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:23,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060387477] [2024-09-25 00:14:23,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:23,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987887205] [2024-09-25 00:14:23,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987887205] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:23,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:14:23,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2024-09-25 00:14:23,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759012959] [2024-09-25 00:14:23,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:23,570 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 00:14:23,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:23,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 00:14:23,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2024-09-25 00:14:23,571 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-25 00:14:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:23,940 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2024-09-25 00:14:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 00:14:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-09-25 00:14:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:23,943 INFO L225 Difference]: With dead ends: 128 [2024-09-25 00:14:23,943 INFO L226 Difference]: Without dead ends: 126 [2024-09-25 00:14:23,944 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=57, Invalid=284, Unknown=1, NotChecked=0, Total=342 [2024-09-25 00:14:23,944 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:23,945 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 264 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:14:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-25 00:14:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2024-09-25 00:14:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 78 states have internal predecessors, (80), 28 states have call successors, (28), 16 states have call predecessors, (28), 17 states have return successors, (31), 25 states have call predecessors, (31), 26 states have call successors, (31) [2024-09-25 00:14:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2024-09-25 00:14:23,977 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 53 [2024-09-25 00:14:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:23,977 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2024-09-25 00:14:23,977 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-25 00:14:23,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2024-09-25 00:14:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-25 00:14:23,979 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:23,979 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:23,999 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 00:14:24,183 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 00:14:24,184 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:24,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:24,185 INFO L85 PathProgramCache]: Analyzing trace with hash -161335246, now seen corresponding path program 1 times [2024-09-25 00:14:24,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:24,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682363423] [2024-09-25 00:14:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:24,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:24,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706723208] [2024-09-25 00:14:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:24,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:24,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:24,229 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 00:14:24,231 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 00:14:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:24,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-25 00:14:24,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:24,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:24,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:24,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:24,416 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 00:14:24,504 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 00:14:24,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-25 00:14:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 00:14:24,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 00:14:24,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:24,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682363423] [2024-09-25 00:14:24,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:24,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706723208] [2024-09-25 00:14:24,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706723208] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:14:24,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:14:24,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 00:14:24,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580129586] [2024-09-25 00:14:24,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:24,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:14:24,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:24,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:14:24,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 00:14:24,543 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-25 00:14:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:24,977 INFO L93 Difference]: Finished difference Result 144 states and 172 transitions. [2024-09-25 00:14:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 00:14:24,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 59 [2024-09-25 00:14:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:24,981 INFO L225 Difference]: With dead ends: 144 [2024-09-25 00:14:24,982 INFO L226 Difference]: Without dead ends: 142 [2024-09-25 00:14:24,982 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-25 00:14:24,983 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:24,983 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 141 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:14:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-25 00:14:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2024-09-25 00:14:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 91 states have internal predecessors, (93), 33 states have call successors, (33), 18 states have call predecessors, (33), 20 states have return successors, (41), 31 states have call predecessors, (41), 31 states have call successors, (41) [2024-09-25 00:14:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2024-09-25 00:14:25,048 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 59 [2024-09-25 00:14:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:25,050 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2024-09-25 00:14:25,050 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-25 00:14:25,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2024-09-25 00:14:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-25 00:14:25,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:25,052 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:25,073 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 00:14:25,252 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 00:14:25,253 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:25,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:25,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1396822734, now seen corresponding path program 1 times [2024-09-25 00:14:25,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:25,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798366756] [2024-09-25 00:14:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:25,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:25,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363241019] [2024-09-25 00:14:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:25,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:25,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:25,298 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 00:14:25,299 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 00:14:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:25,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-25 00:14:25,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:25,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:25,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:14:25,638 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 15 treesize of output 11 [2024-09-25 00:14:26,230 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 00:14:26,238 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 00:14:26,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-25 00:14:26,343 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 00:14:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 00:14:26,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-25 00:14:26,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:26,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798366756] [2024-09-25 00:14:26,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:26,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363241019] [2024-09-25 00:14:26,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363241019] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:14:26,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:14:26,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 22 [2024-09-25 00:14:26,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357010508] [2024-09-25 00:14:26,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:14:26,655 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 00:14:26,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:26,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 00:14:26,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2024-09-25 00:14:26,656 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 22 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-25 00:14:30,676 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 00:14:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:32,133 INFO L93 Difference]: Finished difference Result 208 states and 250 transitions. [2024-09-25 00:14:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-25 00:14:32,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 62 [2024-09-25 00:14:32,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:32,139 INFO L225 Difference]: With dead ends: 208 [2024-09-25 00:14:32,139 INFO L226 Difference]: Without dead ends: 206 [2024-09-25 00:14:32,140 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 00:14:32,140 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 107 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:32,141 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 387 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 938 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-09-25 00:14:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-25 00:14:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2024-09-25 00:14:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 123 states have (on average 1.08130081300813) internal successors, (133), 130 states have internal predecessors, (133), 44 states have call successors, (44), 25 states have call predecessors, (44), 32 states have return successors, (64), 45 states have call predecessors, (64), 41 states have call successors, (64) [2024-09-25 00:14:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2024-09-25 00:14:32,254 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 62 [2024-09-25 00:14:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:32,255 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2024-09-25 00:14:32,255 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-25 00:14:32,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2024-09-25 00:14:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-25 00:14:32,256 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:32,257 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:32,279 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 00:14:32,457 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 00:14:32,458 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:32,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:32,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1851795615, now seen corresponding path program 2 times [2024-09-25 00:14:32,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:32,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250698344] [2024-09-25 00:14:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:32,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:32,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262651759] [2024-09-25 00:14:32,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:14:32,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:32,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:32,509 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 00:14:32,511 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 00:14:32,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:14:32,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:14:32,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-09-25 00:14:32,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:32,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:32,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:32,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:32,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:33,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:33,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:33,121 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 00:14:34,397 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-25 00:14:34,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 80 [2024-09-25 00:14:34,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2024-09-25 00:14:34,539 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 00:14:34,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-25 00:14:36,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:14:36,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 144 [2024-09-25 00:14:36,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:14:36,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 206 [2024-09-25 00:14:36,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:14:36,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 169 [2024-09-25 00:14:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 00:14:36,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:38,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:38,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250698344] [2024-09-25 00:14:38,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:38,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262651759] [2024-09-25 00:14:38,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262651759] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:38,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:14:38,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-25 00:14:38,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309595878] [2024-09-25 00:14:38,101 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:14:38,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 00:14:38,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 00:14:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 00:14:38,103 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand has 25 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-25 00:14:44,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 00:14:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:50,418 INFO L93 Difference]: Finished difference Result 332 states and 381 transitions. [2024-09-25 00:14:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 00:14:50,419 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 65 [2024-09-25 00:14:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:50,421 INFO L225 Difference]: With dead ends: 332 [2024-09-25 00:14:50,422 INFO L226 Difference]: Without dead ends: 330 [2024-09-25 00:14:50,423 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=341, Invalid=3081, Unknown=0, NotChecked=0, Total=3422 [2024-09-25 00:14:50,424 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 138 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 83 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:50,424 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 417 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 893 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2024-09-25 00:14:50,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-09-25 00:14:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 325. [2024-09-25 00:14:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 206 states have (on average 1.0776699029126213) internal successors, (222), 216 states have internal predecessors, (222), 62 states have call successors, (62), 45 states have call predecessors, (62), 56 states have return successors, (91), 64 states have call predecessors, (91), 58 states have call successors, (91) [2024-09-25 00:14:50,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 375 transitions. [2024-09-25 00:14:50,569 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 375 transitions. Word has length 65 [2024-09-25 00:14:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:50,569 INFO L474 AbstractCegarLoop]: Abstraction has 325 states and 375 transitions. [2024-09-25 00:14:50,569 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-25 00:14:50,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 375 transitions. [2024-09-25 00:14:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-25 00:14:50,571 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:50,571 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:50,592 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 00:14:50,772 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 00:14:50,773 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:50,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1323270614, now seen corresponding path program 1 times [2024-09-25 00:14:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:50,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073511363] [2024-09-25 00:14:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:50,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:50,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666526957] [2024-09-25 00:14:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:50,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:50,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:50,818 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 00:14:50,819 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 00:14:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:50,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-09-25 00:14:50,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:50,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:50,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:51,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:51,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:14:51,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:14:51,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:14:51,353 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 00:14:51,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-25 00:15:04,548 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 57 treesize of output 35 [2024-09-25 00:15:04,569 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 00:15:04,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-25 00:15:04,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:15:04,645 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 43 treesize of output 39 [2024-09-25 00:15:04,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2024-09-25 00:15:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-25 00:15:04,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:15:06,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 62 [2024-09-25 00:15:06,774 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 62 treesize of output 46 [2024-09-25 00:15:10,805 WARN L854 $PredicateComparison]: unable to prove that (and (or (forall ((|v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7| Int)) (= (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7|) (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7|))) (select (select |c_#memory_int#6| |v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7|))) (< (select (select |c_#memory_int#6| |c_func_to_recursive_line_32_to_55_0_#in~x.base|) |c_func_to_recursive_line_32_to_55_0_#in~x.offset|) (+ (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_32_to_55_0_#in~r.base|) |c_func_to_recursive_line_32_to_55_0_#in~r.offset|) (* (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_32_to_55_0_#in~q.base|) |c_func_to_recursive_line_32_to_55_0_#in~q.offset|) (select (select |c_#memory_int#5| |c_func_to_recursive_line_32_to_55_0_#in~y.base|) |c_func_to_recursive_line_32_to_55_0_#in~y.offset|)) 1))) (forall ((|v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7| Int)) (let ((.cse1 (select (select |c_#memory_int#6| |v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7|)) (.cse0 (select (select |c_#memory_int#5| |v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7|))) (or (= (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7|) (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7|) .cse0)) .cse1) (not (= .cse1 (+ (* .cse0 (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7|)) (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7|)))))))) is different from false [2024-09-25 00:15:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:15:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073511363] [2024-09-25 00:15:11,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:15:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666526957] [2024-09-25 00:15:11,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666526957] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:11,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:15:11,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-25 00:15:11,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995013181] [2024-09-25 00:15:11,074 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:15:11,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 00:15:11,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 00:15:11,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=4, NotChecked=64, Total=1190 [2024-09-25 00:15:11,076 INFO L87 Difference]: Start difference. First operand 325 states and 375 transitions. Second operand has 28 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-25 00:15:15,148 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 00:15:19,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:15:23,230 WARN L539 Checker$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 00:15:27,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:15:31,467 WARN L539 Checker$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 00:15:35,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:15:39,485 WARN L539 Checker$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 00:15:43,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:15:48,099 WARN L539 Checker$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 00:15:52,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:15:57,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:16:01,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:16:05,221 WARN L539 Checker$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 00:16:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:16:06,565 INFO L93 Difference]: Finished difference Result 439 states and 516 transitions. [2024-09-25 00:16:06,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-25 00:16:06,569 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 77 [2024-09-25 00:16:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:16:06,574 INFO L225 Difference]: With dead ends: 439 [2024-09-25 00:16:06,574 INFO L226 Difference]: Without dead ends: 427 [2024-09-25 00:16:06,577 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=439, Invalid=3721, Unknown=4, NotChecked=126, Total=4290 [2024-09-25 00:16:06,578 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 84 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.8s IncrementalHoareTripleChecker+Time [2024-09-25 00:16:06,578 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 165 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1500 Invalid, 13 Unknown, 0 Unchecked, 53.8s Time] [2024-09-25 00:16:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-09-25 00:16:06,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 416. [2024-09-25 00:16:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 264 states have (on average 1.0795454545454546) internal successors, (285), 276 states have internal predecessors, (285), 79 states have call successors, (79), 57 states have call predecessors, (79), 72 states have return successors, (121), 82 states have call predecessors, (121), 75 states have call successors, (121) [2024-09-25 00:16:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 485 transitions. [2024-09-25 00:16:06,753 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 485 transitions. Word has length 77 [2024-09-25 00:16:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:16:06,753 INFO L474 AbstractCegarLoop]: Abstraction has 416 states and 485 transitions. [2024-09-25 00:16:06,754 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-25 00:16:06,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 485 transitions. [2024-09-25 00:16:06,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-25 00:16:06,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:16:06,755 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 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, 1, 1] [2024-09-25 00:16:06,778 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 00:16:06,956 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 00:16:06,956 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:16:06,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:06,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1472240640, now seen corresponding path program 3 times [2024-09-25 00:16:06,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:16:06,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784247815] [2024-09-25 00:16:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:06,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:16:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:16:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:16:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 00:16:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 00:16:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 00:16:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 00:16:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 00:16:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 00:16:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 00:16:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 00:16:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 00:16:08,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:16:08,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784247815] [2024-09-25 00:16:08,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784247815] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:16:08,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:16:08,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-25 00:16:08,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101803340] [2024-09-25 00:16:08,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:16:08,393 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 00:16:08,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:16:08,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 00:16:08,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-09-25 00:16:08,394 INFO L87 Difference]: Start difference. First operand 416 states and 485 transitions. Second operand has 14 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-25 00:16:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:16:09,195 INFO L93 Difference]: Finished difference Result 443 states and 516 transitions. [2024-09-25 00:16:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 00:16:09,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 81 [2024-09-25 00:16:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:16:09,198 INFO L225 Difference]: With dead ends: 443 [2024-09-25 00:16:09,198 INFO L226 Difference]: Without dead ends: 223 [2024-09-25 00:16:09,200 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-25 00:16:09,200 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 00:16:09,201 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 183 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 00:16:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-09-25 00:16:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2024-09-25 00:16:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 142 states have (on average 1.0633802816901408) internal successors, (151), 147 states have internal predecessors, (151), 42 states have call successors, (42), 32 states have call predecessors, (42), 38 states have return successors, (54), 43 states have call predecessors, (54), 39 states have call successors, (54) [2024-09-25 00:16:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 247 transitions. [2024-09-25 00:16:09,264 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 247 transitions. Word has length 81 [2024-09-25 00:16:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:16:09,265 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 247 transitions. [2024-09-25 00:16:09,265 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-25 00:16:09,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 247 transitions. [2024-09-25 00:16:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-25 00:16:09,267 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:16:09,267 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:16:09,267 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-25 00:16:09,267 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:16:09,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:09,268 INFO L85 PathProgramCache]: Analyzing trace with hash -987042471, now seen corresponding path program 1 times [2024-09-25 00:16:09,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:16:09,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737283931] [2024-09-25 00:16:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:09,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:16:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:16:09,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85158929] [2024-09-25 00:16:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:09,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:16:09,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:16:09,320 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 00:16:09,324 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 00:16:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:09,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-25 00:16:09,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:16:09,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:16:09,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:16:09,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:16:09,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:16:09,592 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 00:16:14,158 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 00:16:26,803 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_7| Int)) (<= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_13|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_13|) (* (select (select |c_#memory_int#0| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_7|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_7|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_7|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_7|)))) is different from true [2024-09-25 00:16:30,967 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_8| Int)) (<= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_14|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_14|) (* (select (select |c_#memory_int#0| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_8|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_8|)))) is different from true [2024-09-25 00:16:31,836 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 00:16:31,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-25 00:16:31,856 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 42 treesize of output 26 [2024-09-25 00:16:32,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-09-25 00:16:32,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-25 00:16:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 91 proven. 13 refuted. 3 times theorem prover too weak. 47 trivial. 22 not checked. [2024-09-25 00:16:36,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:16:52,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-09-25 00:16:52,572 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 56 treesize of output 40 [2024-09-25 00:17:41,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:17:41,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737283931] [2024-09-25 00:17:41,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:17:41,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85158929] [2024-09-25 00:17:41,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85158929] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:17:41,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:17:41,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-25 00:17:41,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640417499] [2024-09-25 00:17:41,313 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:17:41,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 00:17:41,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:17:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 00:17:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=773, Unknown=13, NotChecked=114, Total=992 [2024-09-25 00:17:41,314 INFO L87 Difference]: Start difference. First operand 223 states and 247 transitions. Second operand has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 9 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-25 00:17:46,510 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 00:17:51,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:17:56,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 00:17:59,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:18:03,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 00:18:09,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 00:18:13,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 00:18:19,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:18:23,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 00:18:27,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:18:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:27,499 INFO L93 Difference]: Finished difference Result 246 states and 277 transitions. [2024-09-25 00:18:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 00:18:27,511 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 9 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) Word has length 89 [2024-09-25 00:18:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:27,513 INFO L225 Difference]: With dead ends: 246 [2024-09-25 00:18:27,514 INFO L226 Difference]: Without dead ends: 244 [2024-09-25 00:18:27,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 94.8s TimeCoverageRelationStatistics Valid=244, Invalid=2195, Unknown=19, NotChecked=194, Total=2652 [2024-09-25 00:18:27,516 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 26 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 39.5s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:27,517 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 211 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1068 Invalid, 22 Unknown, 191 Unchecked, 39.5s Time] [2024-09-25 00:18:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-09-25 00:18:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2024-09-25 00:18:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 155 states have (on average 1.070967741935484) internal successors, (166), 160 states have internal predecessors, (166), 45 states have call successors, (45), 35 states have call predecessors, (45), 41 states have return successors, (60), 46 states have call predecessors, (60), 42 states have call successors, (60) [2024-09-25 00:18:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 271 transitions. [2024-09-25 00:18:27,600 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 271 transitions. Word has length 89 [2024-09-25 00:18:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:27,600 INFO L474 AbstractCegarLoop]: Abstraction has 242 states and 271 transitions. [2024-09-25 00:18:27,600 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 9 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-25 00:18:27,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 271 transitions. [2024-09-25 00:18:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-25 00:18:27,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:27,603 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:27,622 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 00:18:27,803 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:27,803 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:27,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:27,804 INFO L85 PathProgramCache]: Analyzing trace with hash -568318842, now seen corresponding path program 2 times [2024-09-25 00:18:27,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:27,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581901293] [2024-09-25 00:18:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:27,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:27,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22749364] [2024-09-25 00:18:27,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:18:27,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:27,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:27,859 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 00:18:27,860 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 00:18:28,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:18:28,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:18:28,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-09-25 00:18:28,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:28,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:18:28,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:18:28,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:18:28,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:18:28,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:18:28,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 00:18:28,501 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 00:18:29,773 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 00:18:29,798 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 00:18:29,931 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-25 00:18:29,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 55 [2024-09-25 00:18:29,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2024-09-25 00:18:30,023 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 00:18:30,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-25 00:18:31,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:18:31,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 146 [2024-09-25 00:18:31,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:18:31,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 162 [2024-09-25 00:18:31,516 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:18:31,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2024-09-25 00:18:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-25 00:18:31,627 INFO L327 TraceCheckSpWp]: Computing backward predicates...