./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i --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 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i -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 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f --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-27b4987-m [2024-09-21 12:34:52,325 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:34:52,390 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:34:52,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:34:52,395 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:34:52,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:34:52,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:34:52,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:34:52,416 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:34:52,416 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:34:52,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:34:52,416 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:34:52,417 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:34:52,417 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:34:52,417 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:34:52,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:34:52,418 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:34:52,418 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:34:52,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:34:52,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:34:52,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:34:52,419 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:34:52,419 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:34:52,420 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:34:52,420 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:34:52,420 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:34:52,420 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:34:52,421 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:34:52,424 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:34:52,424 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:34:52,424 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:34:52,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:34:52,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:34:52,425 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:34:52,425 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:34:52,425 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:34:52,425 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:34:52,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:34:52,426 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:34:52,426 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:34:52,426 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:34:52,426 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:34:52,426 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:34:52,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:34:52,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:34:52,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:34:52,632 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:34:52,632 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:34:52,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-21 12:34:53,848 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:34:54,002 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:34:54,003 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-21 12:34:54,009 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/193134c2d/06aedb7409e24d1581a05ffea4481b1b/FLAG6c2cc1c62 [2024-09-21 12:34:54,412 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/193134c2d/06aedb7409e24d1581a05ffea4481b1b [2024-09-21 12:34:54,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:34:54,415 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:34:54,415 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:34:54,416 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:34:54,420 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:34:54,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f644e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54, skipping insertion in model container [2024-09-21 12:34:54,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,440 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:34:54,575 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_divbin2.i[1567,1580] [2024-09-21 12:34:54,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:34:54,606 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:34:54,621 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_divbin2.i[1567,1580] [2024-09-21 12:34:54,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:34:54,652 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:34:54,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54 WrapperNode [2024-09-21 12:34:54,653 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:34:54,654 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:34:54,655 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:34:54,655 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:34:54,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,669 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,679 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:34:54,679 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:34:54,680 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:34:54,680 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:34:54,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:34:54,689 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,693 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,712 INFO L175 MemorySlicer]: Split 34 memory accesses to 6 slices as follows [2, 3, 7, 4, 7, 11]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 1, 3, 1, 2, 3]. [2024-09-21 12:34:54,713 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,714 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,720 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,721 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,722 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,724 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:34:54,724 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:34:54,725 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:34:54,725 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:34:54,725 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (1/1) ... [2024-09-21 12:34:54,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:34:54,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:54,760 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) [2024-09-21 12:34:54,763 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 [2024-09-21 12:34:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:34:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2024-09-21 12:34:54,835 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2024-09-21 12:34:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:34:54,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:34:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:34:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:34:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-21 12:34:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-21 12:34:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-21 12:34:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-21 12:34:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 12:34:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 12:34:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 12:34:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-21 12:34:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-21 12:34:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-21 12:34:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-21 12:34:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:34:54,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:34:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2024-09-21 12:34:54,837 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2024-09-21 12:34:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:34:54,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:34:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:34:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:34:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-21 12:34:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-21 12:34:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-21 12:34:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-21 12:34:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:34:54,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:34:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:34:54,917 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:34:54,919 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:34:55,100 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-21 12:34:55,100 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:34:55,124 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:34:55,125 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-21 12:34:55,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:55 BoogieIcfgContainer [2024-09-21 12:34:55,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:34:55,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:34:55,129 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:34:55,131 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:34:55,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:34:54" (1/3) ... [2024-09-21 12:34:55,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647c1bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:55, skipping insertion in model container [2024-09-21 12:34:55,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:54" (2/3) ... [2024-09-21 12:34:55,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647c1bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:55, skipping insertion in model container [2024-09-21 12:34:55,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:55" (3/3) ... [2024-09-21 12:34:55,135 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2024-09-21 12:34:55,149 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:34:55,150 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:34:55,209 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:34:55,216 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;@6b919d4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:34:55,216 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:34:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:34:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-21 12:34:55,229 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:55,230 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:55,230 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:55,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:55,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1751035744, now seen corresponding path program 1 times [2024-09-21 12:34:55,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:55,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146352223] [2024-09-21 12:34:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:55,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:55,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:34:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:55,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:34:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:34:55,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:55,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146352223] [2024-09-21 12:34:55,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146352223] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:34:55,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:34:55,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 12:34:55,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986387210] [2024-09-21 12:34:55,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:34:55,470 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 12:34:55,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 12:34:55,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 12:34:55,493 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 12:34:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:55,593 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-09-21 12:34:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 12:34:55,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-21 12:34:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:55,601 INFO L225 Difference]: With dead ends: 62 [2024-09-21 12:34:55,602 INFO L226 Difference]: Without dead ends: 34 [2024-09-21 12:34:55,604 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 12:34:55,606 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:55,607 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:34:55,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-21 12:34:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-09-21 12:34:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 12:34:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-09-21 12:34:55,636 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2024-09-21 12:34:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:55,636 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-09-21 12:34:55,637 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 12:34:55,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-09-21 12:34:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-21 12:34:55,638 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:55,638 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:55,639 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:34:55,639 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:55,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:55,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1433330127, now seen corresponding path program 1 times [2024-09-21 12:34:55,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:55,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023499374] [2024-09-21 12:34:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:55,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:34:55,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635868201] [2024-09-21 12:34:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:55,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:55,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:55,689 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) [2024-09-21 12:34:55,691 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:34:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:55,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-21 12:34:55,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:55,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:55,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:34:55,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:55,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:56,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:34:56,366 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 30 treesize of output 30 [2024-09-21 12:34:56,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:34:56,380 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 44 treesize of output 36 [2024-09-21 12:34:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:34:56,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:34:56,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:56,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023499374] [2024-09-21 12:34:56,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:34:56,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635868201] [2024-09-21 12:34:56,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635868201] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:34:56,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:34:56,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-21 12:34:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72250424] [2024-09-21 12:34:56,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:34:56,475 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-21 12:34:56,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:56,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-21 12:34:56,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:34:56,478 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 13 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:34:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:57,014 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2024-09-21 12:34:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 12:34:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-21 12:34:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:57,016 INFO L225 Difference]: With dead ends: 54 [2024-09-21 12:34:57,016 INFO L226 Difference]: Without dead ends: 52 [2024-09-21 12:34:57,017 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:34:57,018 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:57,018 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 162 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:34:57,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-21 12:34:57,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-09-21 12:34:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 35 states have internal predecessors, (38), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-21 12:34:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2024-09-21 12:34:57,030 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 18 [2024-09-21 12:34:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:57,030 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2024-09-21 12:34:57,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:34:57,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:57,031 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2024-09-21 12:34:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-21 12:34:57,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:57,031 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:57,044 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:34:57,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:57,233 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:57,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:57,233 INFO L85 PathProgramCache]: Analyzing trace with hash -852431656, now seen corresponding path program 1 times [2024-09-21 12:34:57,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:57,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780420109] [2024-09-21 12:34:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:57,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:34:57,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146993062] [2024-09-21 12:34:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:57,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:57,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:57,287 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) [2024-09-21 12:34:57,288 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:34:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:57,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-21 12:34:57,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:57,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:57,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:57,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:57,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-21 12:34:57,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-21 12:34:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:34:57,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:34:57,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:57,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780420109] [2024-09-21 12:34:57,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:34:57,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146993062] [2024-09-21 12:34:57,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146993062] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:34:57,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:34:57,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-21 12:34:57,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009742867] [2024-09-21 12:34:57,929 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:34:57,929 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 12:34:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:57,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 12:34:57,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:34:57,930 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 12:34:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:58,159 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2024-09-21 12:34:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 12:34:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-09-21 12:34:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:58,160 INFO L225 Difference]: With dead ends: 79 [2024-09-21 12:34:58,160 INFO L226 Difference]: Without dead ends: 75 [2024-09-21 12:34:58,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-09-21 12:34:58,161 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:58,162 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:34:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-21 12:34:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 52. [2024-09-21 12:34:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 36 states have internal predecessors, (40), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-21 12:34:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-09-21 12:34:58,178 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 24 [2024-09-21 12:34:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:58,178 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-09-21 12:34:58,178 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 12:34:58,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-09-21 12:34:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-21 12:34:58,179 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:58,179 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:58,186 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:34:58,380 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:58,381 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:58,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:58,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1475040199, now seen corresponding path program 1 times [2024-09-21 12:34:58,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:58,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922080250] [2024-09-21 12:34:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:58,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:34:58,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791276255] [2024-09-21 12:34:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:58,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:58,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:58,446 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) [2024-09-21 12:34:58,448 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:34:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:58,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-21 12:34:58,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:58,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:58,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:34:58,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:58,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:59,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:34:59,095 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 32 treesize of output 32 [2024-09-21 12:34:59,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:34:59,568 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 39 treesize of output 59 [2024-09-21 12:34:59,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:34:59,584 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 56 treesize of output 48 [2024-09-21 12:34:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:34:59,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:00,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:00,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922080250] [2024-09-21 12:35:00,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:00,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791276255] [2024-09-21 12:35:00,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791276255] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:00,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:35:00,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-21 12:35:00,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240838433] [2024-09-21 12:35:00,777 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:00,777 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 12:35:00,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 12:35:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-09-21 12:35:00,778 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 18 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 12:35:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:01,693 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2024-09-21 12:35:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 12:35:01,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2024-09-21 12:35:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:01,698 INFO L225 Difference]: With dead ends: 102 [2024-09-21 12:35:01,698 INFO L226 Difference]: Without dead ends: 50 [2024-09-21 12:35:01,699 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2024-09-21 12:35:01,699 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:01,700 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 166 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:35:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-21 12:35:01,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-21 12:35:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 11 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-21 12:35:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-09-21 12:35:01,713 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 28 [2024-09-21 12:35:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:01,713 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-09-21 12:35:01,714 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 12:35:01,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-09-21 12:35:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-21 12:35:01,715 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:01,715 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:35:01,723 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:35:01,915 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:01,915 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:01,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2029753888, now seen corresponding path program 1 times [2024-09-21 12:35:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:01,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583835537] [2024-09-21 12:35:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:02,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:35:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:02,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:35:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:02,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:35:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:02,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:35:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:02,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:35:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:35:02,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583835537] [2024-09-21 12:35:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583835537] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636026348] [2024-09-21 12:35:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:02,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:02,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:02,684 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) [2024-09-21 12:35:02,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:35:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:02,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-21 12:35:02,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:02,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:02,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:02,948 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 [2024-09-21 12:35:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:35:03,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:03,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636026348] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:03,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:35:03,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-09-21 12:35:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785651243] [2024-09-21 12:35:03,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:03,566 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 12:35:03,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 12:35:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-09-21 12:35:03,567 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 20 states, 16 states have (on average 2.375) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-21 12:35:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:04,067 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2024-09-21 12:35:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:35:04,068 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 34 [2024-09-21 12:35:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:04,069 INFO L225 Difference]: With dead ends: 65 [2024-09-21 12:35:04,069 INFO L226 Difference]: Without dead ends: 59 [2024-09-21 12:35:04,069 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2024-09-21 12:35:04,070 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:04,070 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 65 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:35:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-21 12:35:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-21 12:35:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-21 12:35:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2024-09-21 12:35:04,084 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 34 [2024-09-21 12:35:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:04,084 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2024-09-21 12:35:04,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-21 12:35:04,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2024-09-21 12:35:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-21 12:35:04,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:04,085 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:35:04,098 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:35:04,286 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:04,286 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:04,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:04,287 INFO L85 PathProgramCache]: Analyzing trace with hash 207588481, now seen corresponding path program 1 times [2024-09-21 12:35:04,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:04,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678444344] [2024-09-21 12:35:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:04,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:04,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832057063] [2024-09-21 12:35:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:04,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:04,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:04,375 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) [2024-09-21 12:35:04,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:35:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:04,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-21 12:35:04,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:04,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:04,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:04,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:04,830 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 [2024-09-21 12:35:04,845 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 [2024-09-21 12:35:04,882 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 [2024-09-21 12:35:04,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-21 12:35:04,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-09-21 12:35:04,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-21 12:35:04,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-21 12:35:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-21 12:35:05,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:05,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-09-21 12:35:05,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:05,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678444344] [2024-09-21 12:35:05,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:05,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832057063] [2024-09-21 12:35:05,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832057063] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:05,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:35:05,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-21 12:35:05,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784985186] [2024-09-21 12:35:05,531 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:05,532 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-21 12:35:05,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:05,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-21 12:35:05,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:35:05,533 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 12:35:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:05,970 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2024-09-21 12:35:05,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:35:05,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-09-21 12:35:05,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:05,973 INFO L225 Difference]: With dead ends: 80 [2024-09-21 12:35:05,973 INFO L226 Difference]: Without dead ends: 78 [2024-09-21 12:35:05,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-09-21 12:35:05,974 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:05,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 228 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:35:05,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-21 12:35:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2024-09-21 12:35:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 14 states have call successors, (14), 11 states have call predecessors, (14), 13 states have return successors, (24), 13 states have call predecessors, (24), 11 states have call successors, (24) [2024-09-21 12:35:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2024-09-21 12:35:06,016 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 35 [2024-09-21 12:35:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:06,016 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2024-09-21 12:35:06,016 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 12:35:06,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2024-09-21 12:35:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-21 12:35:06,018 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:06,018 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:35:06,028 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 12:35:06,218 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-21 12:35:06,219 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:06,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:06,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1489727111, now seen corresponding path program 2 times [2024-09-21 12:35:06,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:06,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544267059] [2024-09-21 12:35:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:06,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:06,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:35:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:06,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:35:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:06,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:35:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:07,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:35:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:07,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:35:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:07,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:35:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-21 12:35:07,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544267059] [2024-09-21 12:35:07,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544267059] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053541536] [2024-09-21 12:35:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:35:07,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:07,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:07,289 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) [2024-09-21 12:35:07,292 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:35:07,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:35:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:35:07,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-09-21 12:35:07,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:07,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:07,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:07,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:07,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:35:08,184 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 [2024-09-21 12:35:08,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:35:08,261 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 41 treesize of output 33 [2024-09-21 12:35:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:35:08,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:10,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053541536] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:10,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:35:10,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 31 [2024-09-21 12:35:10,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707373194] [2024-09-21 12:35:10,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:10,345 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-21 12:35:10,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:10,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-21 12:35:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2024-09-21 12:35:10,351 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 31 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 26 states have internal predecessors, (45), 12 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 12:35:12,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:12,980 INFO L93 Difference]: Finished difference Result 157 states and 186 transitions. [2024-09-21 12:35:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-21 12:35:12,981 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 26 states have internal predecessors, (45), 12 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) Word has length 40 [2024-09-21 12:35:12,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:12,985 INFO L225 Difference]: With dead ends: 157 [2024-09-21 12:35:12,985 INFO L226 Difference]: Without dead ends: 149 [2024-09-21 12:35:12,989 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=503, Invalid=3787, Unknown=0, NotChecked=0, Total=4290 [2024-09-21 12:35:12,989 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 86 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:12,990 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 175 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 997 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2024-09-21 12:35:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-21 12:35:13,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 139. [2024-09-21 12:35:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 94 states have internal predecessors, (102), 24 states have call successors, (24), 20 states have call predecessors, (24), 26 states have return successors, (41), 25 states have call predecessors, (41), 20 states have call successors, (41) [2024-09-21 12:35:13,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 167 transitions. [2024-09-21 12:35:13,066 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 167 transitions. Word has length 40 [2024-09-21 12:35:13,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:13,066 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 167 transitions. [2024-09-21 12:35:13,067 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 26 states have internal predecessors, (45), 12 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 12:35:13,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:13,067 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 167 transitions. [2024-09-21 12:35:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 12:35:13,069 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:13,069 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:35:13,095 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-21 12:35:13,269 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 [2024-09-21 12:35:13,270 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:13,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:13,270 INFO L85 PathProgramCache]: Analyzing trace with hash -108501650, now seen corresponding path program 3 times [2024-09-21 12:35:13,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:13,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992023748] [2024-09-21 12:35:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:13,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:13,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:35:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:13,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:35:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:14,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:35:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:14,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:35:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:14,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:35:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:14,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 12:35:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:14,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:35:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:35:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992023748] [2024-09-21 12:35:14,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992023748] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755429643] [2024-09-21 12:35:14,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:35:14,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:14,623 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) [2024-09-21 12:35:14,624 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:35:14,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-21 12:35:14,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:35:14,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-21 12:35:14,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:14,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:14,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:14,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:15,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-21 12:35:15,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-21 12:35:15,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-21 12:35:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-21 12:35:15,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:35:15,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755429643] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:35:15,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:35:15,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 25 [2024-09-21 12:35:15,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080766261] [2024-09-21 12:35:15,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:35:15,193 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:35:15,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:15,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:35:15,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2024-09-21 12:35:15,194 INFO L87 Difference]: Start difference. First operand 139 states and 167 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-21 12:35:15,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:15,520 INFO L93 Difference]: Finished difference Result 149 states and 176 transitions. [2024-09-21 12:35:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 12:35:15,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2024-09-21 12:35:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:15,523 INFO L225 Difference]: With dead ends: 149 [2024-09-21 12:35:15,523 INFO L226 Difference]: Without dead ends: 143 [2024-09-21 12:35:15,523 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2024-09-21 12:35:15,524 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:15,524 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 68 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 181 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:35:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-21 12:35:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2024-09-21 12:35:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 95 states have internal predecessors, (103), 24 states have call successors, (24), 20 states have call predecessors, (24), 27 states have return successors, (42), 25 states have call predecessors, (42), 20 states have call successors, (42) [2024-09-21 12:35:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 169 transitions. [2024-09-21 12:35:15,594 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 169 transitions. Word has length 46 [2024-09-21 12:35:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:15,595 INFO L474 AbstractCegarLoop]: Abstraction has 141 states and 169 transitions. [2024-09-21 12:35:15,595 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-21 12:35:15,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 169 transitions. [2024-09-21 12:35:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-21 12:35:15,600 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:15,600 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:35:15,619 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-21 12:35:15,800 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 [2024-09-21 12:35:15,801 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:15,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2101514835, now seen corresponding path program 1 times [2024-09-21 12:35:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:15,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499135438] [2024-09-21 12:35:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:15,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:16,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:35:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:16,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:35:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:16,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:35:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:16,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:35:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:17,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:35:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:17,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:35:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:17,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:35:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:35:17,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:17,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499135438] [2024-09-21 12:35:17,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499135438] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:17,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846171256] [2024-09-21 12:35:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:17,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:17,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:17,335 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) [2024-09-21 12:35:17,336 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:35:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:17,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-21 12:35:17,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:17,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:17,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:35:17,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:17,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:35:17,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-21 12:35:18,246 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 [2024-09-21 12:35:18,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-21 12:35:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:35:18,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:19,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2024-09-21 12:35:19,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2024-09-21 12:35:20,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846171256] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:20,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:35:20,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2024-09-21 12:35:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251297283] [2024-09-21 12:35:20,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:20,412 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-21 12:35:20,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:20,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-21 12:35:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1984, Unknown=0, NotChecked=0, Total=2162 [2024-09-21 12:35:20,414 INFO L87 Difference]: Start difference. First operand 141 states and 169 transitions. Second operand has 35 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 29 states have internal predecessors, (51), 13 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-21 12:35:22,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:22,410 INFO L93 Difference]: Finished difference Result 159 states and 203 transitions. [2024-09-21 12:35:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 12:35:22,411 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 29 states have internal predecessors, (51), 13 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 47 [2024-09-21 12:35:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:22,413 INFO L225 Difference]: With dead ends: 159 [2024-09-21 12:35:22,413 INFO L226 Difference]: Without dead ends: 139 [2024-09-21 12:35:22,414 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=409, Invalid=3623, Unknown=0, NotChecked=0, Total=4032 [2024-09-21 12:35:22,415 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:22,415 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 78 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-21 12:35:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-21 12:35:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 128. [2024-09-21 12:35:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 86 states have internal predecessors, (90), 24 states have call successors, (24), 17 states have call predecessors, (24), 25 states have return successors, (49), 24 states have call predecessors, (49), 21 states have call successors, (49) [2024-09-21 12:35:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 163 transitions. [2024-09-21 12:35:22,484 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 163 transitions. Word has length 47 [2024-09-21 12:35:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:22,485 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 163 transitions. [2024-09-21 12:35:22,485 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 29 states have internal predecessors, (51), 13 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-21 12:35:22,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:22,486 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 163 transitions. [2024-09-21 12:35:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 12:35:22,487 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:22,487 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:35:22,508 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 12:35:22,688 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 [2024-09-21 12:35:22,689 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:22,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1905411784, now seen corresponding path program 2 times [2024-09-21 12:35:22,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:22,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701812610] [2024-09-21 12:35:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:23,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:35:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:23,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:35:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:23,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:35:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:23,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 12:35:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:23,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-21 12:35:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-21 12:35:23,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:23,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701812610] [2024-09-21 12:35:23,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701812610] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:23,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880634068] [2024-09-21 12:35:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:35:23,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:23,936 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) [2024-09-21 12:35:23,945 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 12:35:24,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:35:24,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:35:24,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-09-21 12:35:24,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:24,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:35:24,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:24,585 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 [2024-09-21 12:35:24,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2024-09-21 12:35:24,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 12:35:24,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:25,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880634068] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:25,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:35:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 25 [2024-09-21 12:35:25,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842816515] [2024-09-21 12:35:25,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:25,888 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 12:35:25,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:25,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 12:35:25,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 12:35:25,890 INFO L87 Difference]: Start difference. First operand 128 states and 163 transitions. Second operand has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-21 12:35:27,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:27,043 INFO L93 Difference]: Finished difference Result 219 states and 273 transitions. [2024-09-21 12:35:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-21 12:35:27,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 46 [2024-09-21 12:35:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:27,045 INFO L225 Difference]: With dead ends: 219 [2024-09-21 12:35:27,045 INFO L226 Difference]: Without dead ends: 158 [2024-09-21 12:35:27,046 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2024-09-21 12:35:27,047 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:27,047 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 60 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 489 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:35:27,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-09-21 12:35:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 104. [2024-09-21 12:35:27,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 19 states have call successors, (19), 16 states have call predecessors, (19), 18 states have return successors, (27), 17 states have call predecessors, (27), 16 states have call successors, (27) [2024-09-21 12:35:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2024-09-21 12:35:27,099 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 46 [2024-09-21 12:35:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:27,099 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2024-09-21 12:35:27,099 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-21 12:35:27,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2024-09-21 12:35:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-21 12:35:27,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:27,101 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:35:27,111 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-21 12:35:27,304 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 [2024-09-21 12:35:27,305 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:27,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1283866385, now seen corresponding path program 1 times [2024-09-21 12:35:27,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:27,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882446258] [2024-09-21 12:35:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:27,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:27,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758980462] [2024-09-21 12:35:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:27,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:27,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:27,354 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) [2024-09-21 12:35:27,355 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 12:35:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:27,587 WARN L260 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 178 conjuncts are in the unsatisfiable core [2024-09-21 12:35:27,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:27,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:27,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:27,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:27,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:27,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:35:27,982 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 [2024-09-21 12:35:28,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:35:28,040 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 32 treesize of output 32 [2024-09-21 12:35:31,579 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 [2024-09-21 12:35:31,611 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-21 12:35:31,611 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 49 treesize of output 56 [2024-09-21 12:35:31,656 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-21 12:35:31,656 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 [2024-09-21 12:35:31,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:35:31,788 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 92 treesize of output 136 [2024-09-21 12:35:31,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:35:31,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 230 [2024-09-21 12:35:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-21 12:35:32,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:48,241 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4| Int)) (let ((.cse0 (mod (select (select |c_#memory_int#3| |v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4|) 4294967296))) (or (not (= .cse0 (mod (+ (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_8|) |v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_8|) (* (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4|) (select (select |c_old(#memory_int#5)| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_13|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_13|))) 4294967296))) (= (mod (+ (select (select |c_#memory_int#4| |v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_8|) |v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_8|) (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_13|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_13|) (select (select |c_#memory_int#2| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4|))) 4294967296) .cse0)))) (or (= (mod (+ (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_37_to_44_0_#in~r.base|) |c_func_to_recursive_line_37_to_44_0_#in~r.offset|) (* (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_37_to_44_0_#in~q.base|) |c_func_to_recursive_line_37_to_44_0_#in~q.offset|) (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_37_to_44_0_#in~b.base|) |c_func_to_recursive_line_37_to_44_0_#in~b.offset|))) 4294967296) (mod (select (select |c_#memory_int#3| |c_func_to_recursive_line_37_to_44_0_#in~A.base|) |c_func_to_recursive_line_37_to_44_0_#in~A.offset|) 4294967296)) (forall ((|v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4| Int)) (= (mod (+ (select (select |c_#memory_int#4| |v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_8|) |v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_8|) (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_13|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_13|) (select (select |c_#memory_int#2| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4|))) 4294967296) (mod (select (select |c_#memory_int#3| |v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4|) 4294967296))))) is different from false [2024-09-21 12:35:48,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:48,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882446258] [2024-09-21 12:35:48,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:48,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758980462] [2024-09-21 12:35:48,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758980462] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:48,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:35:48,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-21 12:35:48,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831974955] [2024-09-21 12:35:48,940 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:48,940 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 12:35:48,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 12:35:48,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=780, Unknown=1, NotChecked=56, Total=930 [2024-09-21 12:35:48,941 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 12:35:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:53,728 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2024-09-21 12:35:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-21 12:35:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-21 12:35:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:53,730 INFO L225 Difference]: With dead ends: 108 [2024-09-21 12:35:53,730 INFO L226 Difference]: Without dead ends: 73 [2024-09-21 12:35:53,731 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=231, Invalid=1842, Unknown=1, NotChecked=88, Total=2162 [2024-09-21 12:35:53,731 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:53,732 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 210 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 557 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2024-09-21 12:35:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-21 12:35:53,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-09-21 12:35:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 48 states have internal predecessors, (50), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2024-09-21 12:35:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2024-09-21 12:35:53,777 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 47 [2024-09-21 12:35:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:53,777 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2024-09-21 12:35:53,778 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 12:35:53,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2024-09-21 12:35:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-21 12:35:53,779 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:53,779 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:35:53,788 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-21 12:35:53,982 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 [2024-09-21 12:35:53,983 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:53,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:53,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1276039393, now seen corresponding path program 3 times [2024-09-21 12:35:53,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:53,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494247566] [2024-09-21 12:35:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:53,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:54,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292479886] [2024-09-21 12:35:54,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:35:54,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:54,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:54,061 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) [2024-09-21 12:35:54,062 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 12:35:54,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-21 12:35:54,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:35:54,460 WARN L260 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 281 conjuncts are in the unsatisfiable core [2024-09-21 12:35:54,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:54,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:54,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:54,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:54,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:35:54,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:54,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:35:54,996 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 [2024-09-21 12:35:55,498 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 [2024-09-21 12:35:55,524 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-21 12:35:55,524 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 21 [2024-09-21 12:35:55,647 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-21 12:35:55,647 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 25 [2024-09-21 12:35:55,675 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-21 12:35:55,676 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 58 treesize of output 53 [2024-09-21 12:35:56,730 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 [2024-09-21 12:35:56,748 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 [2024-09-21 12:35:56,855 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 [2024-09-21 12:35:56,887 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-21 12:35:56,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 108 treesize of output 110 [2024-09-21 12:35:57,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:35:57,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 160 treesize of output 296 [2024-09-21 12:35:57,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:35:57,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 234 treesize of output 298 [2024-09-21 12:35:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:35:58,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:11,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:11,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494247566] [2024-09-21 12:36:11,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:11,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292479886] [2024-09-21 12:36:11,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292479886] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:11,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:36:11,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-21 12:36:11,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622296319] [2024-09-21 12:36:11,885 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:36:11,885 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-21 12:36:11,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:11,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-21 12:36:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1512, Unknown=2, NotChecked=0, Total=1640 [2024-09-21 12:36:11,887 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 28 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 9 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 12:36:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:20,323 INFO L93 Difference]: Finished difference Result 126 states and 154 transitions. [2024-09-21 12:36:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-21 12:36:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 9 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2024-09-21 12:36:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:20,325 INFO L225 Difference]: With dead ends: 126 [2024-09-21 12:36:20,325 INFO L226 Difference]: Without dead ends: 114 [2024-09-21 12:36:20,326 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=214, Invalid=2333, Unknown=3, NotChecked=0, Total=2550 [2024-09-21 12:36:20,327 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:20,327 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 367 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-21 12:36:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-21 12:36:20,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2024-09-21 12:36:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 75 states have internal predecessors, (80), 20 states have call successors, (20), 17 states have call predecessors, (20), 19 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2024-09-21 12:36:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2024-09-21 12:36:20,391 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 52 [2024-09-21 12:36:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:20,391 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2024-09-21 12:36:20,391 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 9 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 12:36:20,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2024-09-21 12:36:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-21 12:36:20,392 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:20,393 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:36:20,403 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-21 12:36:20,597 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:20,598 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:20,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:20,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2085386019, now seen corresponding path program 1 times [2024-09-21 12:36:20,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:20,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062230807] [2024-09-21 12:36:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:20,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:20,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557243381] [2024-09-21 12:36:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:20,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:20,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:20,654 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) [2024-09-21 12:36:20,660 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 12:36:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:21,116 WARN L260 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 260 conjuncts are in the unsatisfiable core [2024-09-21 12:36:21,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:21,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:21,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:21,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:21,147 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 [2024-09-21 12:36:21,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:21,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:36:21,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:36:21,955 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 [2024-09-21 12:36:22,529 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-21 12:36:22,529 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 21 [2024-09-21 12:36:22,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:36:22,671 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-21 12:36:22,671 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 58 treesize of output 61 [2024-09-21 12:36:22,728 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-21 12:36:22,729 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 [2024-09-21 12:36:24,197 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 [2024-09-21 12:36:24,204 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 [2024-09-21 12:36:24,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:36:24,645 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 106 treesize of output 182 [2024-09-21 12:36:24,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:36:24,689 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 162 treesize of output 182 [2024-09-21 12:36:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-21 12:36:25,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:47,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:47,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062230807] [2024-09-21 12:36:47,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:47,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557243381] [2024-09-21 12:36:47,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557243381] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:47,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:36:47,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-21 12:36:47,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238735096] [2024-09-21 12:36:47,412 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:36:47,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 12:36:47,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:47,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 12:36:47,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1286, Unknown=4, NotChecked=0, Total=1406 [2024-09-21 12:36:47,414 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-21 12:36:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:50,461 INFO L93 Difference]: Finished difference Result 174 states and 213 transitions. [2024-09-21 12:36:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 12:36:50,462 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2024-09-21 12:36:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:50,463 INFO L225 Difference]: With dead ends: 174 [2024-09-21 12:36:50,463 INFO L226 Difference]: Without dead ends: 127 [2024-09-21 12:36:50,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=203, Invalid=2049, Unknown=4, NotChecked=0, Total=2256 [2024-09-21 12:36:50,464 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:50,464 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 456 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-21 12:36:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-21 12:36:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2024-09-21 12:36:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 84 states have internal predecessors, (88), 22 states have call successors, (22), 19 states have call predecessors, (22), 21 states have return successors, (38), 19 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-21 12:36:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2024-09-21 12:36:50,533 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 52 [2024-09-21 12:36:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:50,534 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2024-09-21 12:36:50,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-21 12:36:50,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2024-09-21 12:36:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 12:36:50,535 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:50,535 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:36:50,543 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-21 12:36:50,735 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-21 12:36:50,735 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:50,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash 992478086, now seen corresponding path program 4 times [2024-09-21 12:36:50,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:50,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638102115] [2024-09-21 12:36:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:50,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:50,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617775116] [2024-09-21 12:36:50,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:36:50,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:50,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:50,786 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:36:50,787 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 12:36:51,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:36:51,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:36:51,137 WARN L260 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 276 conjuncts are in the unsatisfiable core [2024-09-21 12:36:51,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:51,146 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 15 treesize of output 1 [2024-09-21 12:36:51,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:51,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:51,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:51,515 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 [2024-09-21 12:36:51,873 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 [2024-09-21 12:36:51,887 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-21 12:36:51,887 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 21 [2024-09-21 12:36:51,961 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-21 12:36:51,961 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 25 [2024-09-21 12:36:51,981 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-21 12:36:51,982 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 49 treesize of output 48 [2024-09-21 12:36:52,671 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 [2024-09-21 12:36:52,694 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 [2024-09-21 12:36:52,814 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-21 12:36:52,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 103 [2024-09-21 12:36:52,924 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 [2024-09-21 12:36:53,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:36:53,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 160 treesize of output 296 [2024-09-21 12:36:53,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:36:53,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 225 treesize of output 293 [2024-09-21 12:36:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-21 12:36:54,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:37:13,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:37:13,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638102115] [2024-09-21 12:37:13,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:37:13,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617775116] [2024-09-21 12:37:13,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617775116] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:37:13,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:37:13,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-21 12:37:13,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901780502] [2024-09-21 12:37:13,271 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:37:13,272 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 12:37:13,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:37:13,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 12:37:13,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1220, Unknown=3, NotChecked=0, Total=1332 [2024-09-21 12:37:13,273 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 25 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 19 states have internal predecessors, (32), 8 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-21 12:37:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:37:22,309 INFO L93 Difference]: Finished difference Result 190 states and 230 transitions. [2024-09-21 12:37:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-21 12:37:22,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 19 states have internal predecessors, (32), 8 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 58 [2024-09-21 12:37:22,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:37:22,311 INFO L225 Difference]: With dead ends: 190 [2024-09-21 12:37:22,311 INFO L226 Difference]: Without dead ends: 186 [2024-09-21 12:37:22,312 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=188, Invalid=1970, Unknown=4, NotChecked=0, Total=2162 [2024-09-21 12:37:22,312 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 46 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:37:22,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 523 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-21 12:37:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-09-21 12:37:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 171. [2024-09-21 12:37:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 111 states have (on average 1.117117117117117) internal successors, (124), 116 states have internal predecessors, (124), 29 states have call successors, (29), 26 states have call predecessors, (29), 30 states have return successors, (53), 28 states have call predecessors, (53), 26 states have call successors, (53) [2024-09-21 12:37:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 206 transitions. [2024-09-21 12:37:22,451 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 206 transitions. Word has length 58 [2024-09-21 12:37:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:37:22,453 INFO L474 AbstractCegarLoop]: Abstraction has 171 states and 206 transitions. [2024-09-21 12:37:22,453 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 19 states have internal predecessors, (32), 8 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-21 12:37:22,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:37:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 206 transitions. [2024-09-21 12:37:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 12:37:22,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:37:22,457 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:37:22,480 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-21 12:37:22,657 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-21 12:37:22,658 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:37:22,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:37:22,658 INFO L85 PathProgramCache]: Analyzing trace with hash 183131460, now seen corresponding path program 2 times [2024-09-21 12:37:22,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:37:22,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955153986] [2024-09-21 12:37:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:37:22,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:37:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:37:22,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605560900] [2024-09-21 12:37:22,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:37:22,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:37:22,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:37:22,756 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:37:22,757 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-21 12:37:23,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:37:23,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:37:23,294 WARN L260 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 279 conjuncts are in the unsatisfiable core [2024-09-21 12:37:23,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:37:23,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:37:23,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:37:23,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:37:23,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:37:23,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:37:23,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:37:24,207 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 [2024-09-21 12:37:24,817 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 [2024-09-21 12:37:24,842 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-21 12:37:24,843 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 21 [2024-09-21 12:37:24,966 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-21 12:37:24,967 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 58 treesize of output 61 [2024-09-21 12:37:25,025 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-21 12:37:25,025 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 [2024-09-21 12:37:26,647 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 [2024-09-21 12:37:26,681 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 [2024-09-21 12:37:27,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:37:27,155 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 88 treesize of output 140 [2024-09-21 12:37:27,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:37:27,224 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 90 treesize of output 166 [2024-09-21 12:37:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-21 12:37:27,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:37:51,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:37:51,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955153986] [2024-09-21 12:37:51,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:37:51,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605560900] [2024-09-21 12:37:51,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605560900] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:37:51,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:37:51,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-21 12:37:51,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476864838] [2024-09-21 12:37:51,643 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:37:51,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-21 12:37:51,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:37:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-21 12:37:51,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1430, Unknown=4, NotChecked=0, Total=1560 [2024-09-21 12:37:51,644 INFO L87 Difference]: Start difference. First operand 171 states and 206 transitions. Second operand has 27 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-21 12:38:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:00,183 INFO L93 Difference]: Finished difference Result 234 states and 285 transitions. [2024-09-21 12:38:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-21 12:38:00,183 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2024-09-21 12:38:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:00,185 INFO L225 Difference]: With dead ends: 234 [2024-09-21 12:38:00,185 INFO L226 Difference]: Without dead ends: 179 [2024-09-21 12:38:00,186 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=220, Invalid=2225, Unknown=5, NotChecked=0, Total=2450 [2024-09-21 12:38:00,186 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:00,186 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 644 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-21 12:38:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-21 12:38:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 125. [2024-09-21 12:38:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.1125) internal successors, (89), 85 states have internal predecessors, (89), 22 states have call successors, (22), 19 states have call predecessors, (22), 22 states have return successors, (40), 20 states have call predecessors, (40), 20 states have call successors, (40) [2024-09-21 12:38:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2024-09-21 12:38:00,282 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 58 [2024-09-21 12:38:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:00,283 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2024-09-21 12:38:00,283 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-21 12:38:00,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2024-09-21 12:38:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-21 12:38:00,284 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:00,284 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:00,293 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-21 12:38:00,484 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-21 12:38:00,484 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:00,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2056886675, now seen corresponding path program 5 times [2024-09-21 12:38:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756028234] [2024-09-21 12:38:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:00,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652803439] [2024-09-21 12:38:00,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 12:38:00,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:00,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:00,617 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:38:00,618 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-21 12:38:01,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-21 12:38:01,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:38:01,149 WARN L260 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 322 conjuncts are in the unsatisfiable core [2024-09-21 12:38:01,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:01,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:38:01,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:38:01,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:38:01,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:38:01,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:38:01,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:38:02,027 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 [2024-09-21 12:38:02,745 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 [2024-09-21 12:38:02,780 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-21 12:38:02,781 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 21 [2024-09-21 12:38:02,902 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-21 12:38:02,902 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 58 treesize of output 53 [2024-09-21 12:38:02,943 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-21 12:38:02,943 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 25 [2024-09-21 12:38:04,285 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 [2024-09-21 12:38:04,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:38:04,477 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-21 12:38:04,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 108 treesize of output 110 [2024-09-21 12:38:04,622 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 [2024-09-21 12:38:05,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:38:05,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 176 treesize of output 352 [2024-09-21 12:38:05,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:38:05,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 94 treesize of output 226 [2024-09-21 12:38:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-21 12:38:06,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:22,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:22,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756028234] [2024-09-21 12:38:22,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:22,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652803439] [2024-09-21 12:38:22,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652803439] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:22,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:22,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-21 12:38:22,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066215522] [2024-09-21 12:38:22,338 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:22,338 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-21 12:38:22,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:22,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-21 12:38:22,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1735, Unknown=2, NotChecked=0, Total=1892 [2024-09-21 12:38:22,339 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 9 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-21 12:38:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:31,051 INFO L93 Difference]: Finished difference Result 182 states and 222 transitions. [2024-09-21 12:38:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-21 12:38:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 9 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 64 [2024-09-21 12:38:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:31,053 INFO L225 Difference]: With dead ends: 182 [2024-09-21 12:38:31,053 INFO L226 Difference]: Without dead ends: 170 [2024-09-21 12:38:31,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=277, Invalid=2690, Unknown=3, NotChecked=0, Total=2970 [2024-09-21 12:38:31,054 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 31 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:31,054 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 582 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-21 12:38:31,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-21 12:38:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2024-09-21 12:38:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 112 states have internal predecessors, (119), 28 states have call successors, (28), 25 states have call predecessors, (28), 29 states have return successors, (53), 27 states have call predecessors, (53), 26 states have call successors, (53) [2024-09-21 12:38:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 200 transitions. [2024-09-21 12:38:31,158 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 200 transitions. Word has length 64 [2024-09-21 12:38:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:31,158 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 200 transitions. [2024-09-21 12:38:31,159 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 9 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-21 12:38:31,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 200 transitions. [2024-09-21 12:38:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-21 12:38:31,159 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:31,160 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:31,171 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-21 12:38:31,360 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-21 12:38:31,360 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:31,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1428733995, now seen corresponding path program 3 times [2024-09-21 12:38:31,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:31,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894998679] [2024-09-21 12:38:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:31,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:31,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414644155] [2024-09-21 12:38:31,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:38:31,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:31,407 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:38:31,408 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-21 12:38:32,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-21 12:38:32,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:38:32,144 WARN L260 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 285 conjuncts are in the unsatisfiable core [2024-09-21 12:38:32,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:32,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:38:32,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:38:32,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:38:32,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:38:32,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:38:32,731 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 [2024-09-21 12:38:33,296 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 [2024-09-21 12:38:33,310 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-21 12:38:33,310 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 21 [2024-09-21 12:38:33,398 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-21 12:38:33,398 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 26 treesize of output 29 [2024-09-21 12:38:33,429 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-21 12:38:33,430 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 49 treesize of output 48 [2024-09-21 12:38:34,327 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 [2024-09-21 12:38:34,353 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 [2024-09-21 12:38:34,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:38:34,708 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 87 treesize of output 83 [2024-09-21 12:38:34,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:38:34,733 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 97 treesize of output 101 [2024-09-21 12:38:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-21 12:38:34,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:39:02,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:39:02,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894998679] [2024-09-21 12:39:02,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:39:02,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414644155] [2024-09-21 12:39:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414644155] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:39:02,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:39:02,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-21 12:39:02,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329610686] [2024-09-21 12:39:02,051 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:39:02,052 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-21 12:39:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:39:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-21 12:39:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1431, Unknown=4, NotChecked=0, Total=1560 [2024-09-21 12:39:02,052 INFO L87 Difference]: Start difference. First operand 165 states and 200 transitions. Second operand has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 9 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-21 12:39:08,494 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]