./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-25 00:21:08,488 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:21:08,574 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:21:08,580 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:21:08,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:21:08,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:21:08,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:21:08,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:21:08,611 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:21:08,615 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:21:08,615 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:21:08,615 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:21:08,616 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:21:08,616 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:21:08,616 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:21:08,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:21:08,617 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:21:08,617 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:21:08,617 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:21:08,617 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:21:08,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:21:08,619 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:21:08,620 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:21:08,620 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:21:08,621 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:21:08,621 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:21:08,621 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:21:08,621 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:21:08,622 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:21:08,622 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:21:08,622 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:21:08,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:21:08,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:21:08,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:21:08,625 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:21:08,626 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:21:08,626 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:21:08,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:21:08,627 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:21:08,627 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:21:08,627 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:21:08,628 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:21:08,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:21:08,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:21:08,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:21:08,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:21:08,904 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:21:08,904 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:21:08,905 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-09-25 00:21:10,303 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:21:10,495 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:21:10,495 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-09-25 00:21:10,501 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7a67a0467/99afaf00e4fb4d9bb63186f396f12e8d/FLAG9b66c5e33 [2024-09-25 00:21:10,515 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7a67a0467/99afaf00e4fb4d9bb63186f396f12e8d [2024-09-25 00:21:10,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:21:10,522 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:21:10,524 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:21:10,524 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:21:10,528 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:21:10,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5adb5a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10, skipping insertion in model container [2024-09-25 00:21:10,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,547 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:21:10,670 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_ps4-ll.c[987,1000] [2024-09-25 00:21:10,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:21:10,695 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:21:10,706 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_ps4-ll.c[987,1000] [2024-09-25 00:21:10,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:21:10,744 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:21:10,745 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10 WrapperNode [2024-09-25 00:21:10,745 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:21:10,747 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:21:10,748 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:21:10,748 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:21:10,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,771 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,787 INFO L138 Inliner]: procedures = 16, calls = 63, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:21:10,788 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:21:10,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:21:10,789 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:21:10,789 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:21:10,798 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,801 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,821 INFO L175 MemorySlicer]: Split 41 memory accesses to 5 slices as follows [2, 3, 27, 5, 4]. 66 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 2, 2, 2]. [2024-09-25 00:21:10,822 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,822 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,827 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,843 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:21:10,844 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:21:10,844 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:21:10,845 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:21:10,845 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (1/1) ... [2024-09-25 00:21:10,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:21:10,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:10,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 00:21:10,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 00:21:10,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:21:10,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:21:10,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:21:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:21:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 00:21:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 00:21:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 00:21:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 00:21:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 00:21:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 00:21:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 00:21:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 00:21:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 00:21:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 00:21:10,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:21:10,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:21:10,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:21:10,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:21:10,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 00:21:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 00:21:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 00:21:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 00:21:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 00:21:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2024-09-25 00:21:10,937 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2024-09-25 00:21:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 00:21:10,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 00:21:10,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 00:21:11,027 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:21:11,030 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:21:11,206 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-25 00:21:11,206 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:21:11,228 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:21:11,229 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 00:21:11,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:21:11 BoogieIcfgContainer [2024-09-25 00:21:11,229 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:21:11,231 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:21:11,231 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:21:11,236 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:21:11,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:21:10" (1/3) ... [2024-09-25 00:21:11,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14355094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:21:11, skipping insertion in model container [2024-09-25 00:21:11,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:10" (2/3) ... [2024-09-25 00:21:11,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14355094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:21:11, skipping insertion in model container [2024-09-25 00:21:11,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:21:11" (3/3) ... [2024-09-25 00:21:11,238 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps4-ll.c [2024-09-25 00:21:11,253 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:21:11,253 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 00:21:11,296 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:21:11,301 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;@73c97880, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:21:11,301 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 00:21:11,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 00:21:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-25 00:21:11,310 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:11,311 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:11,311 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:11,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:11,316 INFO L85 PathProgramCache]: Analyzing trace with hash -185093150, now seen corresponding path program 1 times [2024-09-25 00:21:11,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:11,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396793741] [2024-09-25 00:21:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:11,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131848321] [2024-09-25 00:21:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:11,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:11,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:11,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:11,547 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 00:21:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:11,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-25 00:21:11,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:11,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:11,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:21:11,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 00:21:11,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:11,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396793741] [2024-09-25 00:21:11,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:11,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131848321] [2024-09-25 00:21:11,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131848321] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:21:11,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:21:11,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 00:21:11,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580243673] [2024-09-25 00:21:11,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:21:11,890 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:21:11,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:21:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 00:21:11,930 INFO L87 Difference]: Start difference. First operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 00:21:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:12,124 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2024-09-25 00:21:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:21:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-25 00:21:12,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:12,132 INFO L225 Difference]: With dead ends: 64 [2024-09-25 00:21:12,133 INFO L226 Difference]: Without dead ends: 38 [2024-09-25 00:21:12,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:21:12,138 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:12,138 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:21:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-25 00:21:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-09-25 00:21:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 00:21:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-09-25 00:21:12,169 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 12 [2024-09-25 00:21:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:12,169 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-09-25 00:21:12,170 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 00:21:12,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-09-25 00:21:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-25 00:21:12,171 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:12,171 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:12,185 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 00:21:12,375 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-25 00:21:12,376 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:12,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:12,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2020592497, now seen corresponding path program 1 times [2024-09-25 00:21:12,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:12,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688797561] [2024-09-25 00:21:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:12,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:12,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43564079] [2024-09-25 00:21:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:12,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:12,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:12,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:12,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 00:21:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:12,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-25 00:21:12,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:12,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:12,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:12,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:12,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:21:12,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:21:13,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:13,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688797561] [2024-09-25 00:21:13,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:13,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43564079] [2024-09-25 00:21:13,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43564079] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:21:13,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:21:13,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-25 00:21:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829210195] [2024-09-25 00:21:13,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:13,126 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 00:21:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:13,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 00:21:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-25 00:21:13,128 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 00:21:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:13,631 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-09-25 00:21:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 00:21:13,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-09-25 00:21:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:13,635 INFO L225 Difference]: With dead ends: 65 [2024-09-25 00:21:13,636 INFO L226 Difference]: Without dead ends: 63 [2024-09-25 00:21:13,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-09-25 00:21:13,638 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:13,641 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 129 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:21:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-25 00:21:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2024-09-25 00:21:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-25 00:21:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-09-25 00:21:13,668 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 22 [2024-09-25 00:21:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:13,669 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-09-25 00:21:13,670 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 00:21:13,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-09-25 00:21:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-25 00:21:13,672 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:13,672 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] [2024-09-25 00:21:13,699 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 00:21:13,876 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:13,877 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:13,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1466132055, now seen corresponding path program 1 times [2024-09-25 00:21:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:13,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704277578] [2024-09-25 00:21:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:13,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886165712] [2024-09-25 00:21:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:13,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:13,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:13,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:13,925 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 00:21:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:14,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 00:21:14,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:14,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:21:14,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 00:21:14,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:14,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704277578] [2024-09-25 00:21:14,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:14,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886165712] [2024-09-25 00:21:14,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886165712] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:21:14,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:21:14,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-25 00:21:14,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715040579] [2024-09-25 00:21:14,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:21:14,069 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 00:21:14,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:14,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 00:21:14,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-25 00:21:14,070 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 00:21:14,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:14,187 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-09-25 00:21:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 00:21:14,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-09-25 00:21:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:14,189 INFO L225 Difference]: With dead ends: 62 [2024-09-25 00:21:14,190 INFO L226 Difference]: Without dead ends: 60 [2024-09-25 00:21:14,190 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-25 00:21:14,191 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:14,191 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 55 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:21:14,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-25 00:21:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-25 00:21:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-25 00:21:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2024-09-25 00:21:14,209 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 22 [2024-09-25 00:21:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:14,210 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2024-09-25 00:21:14,210 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 00:21:14,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2024-09-25 00:21:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-25 00:21:14,212 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:14,212 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:14,230 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 00:21:14,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-25 00:21:14,417 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:14,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:14,418 INFO L85 PathProgramCache]: Analyzing trace with hash 249164484, now seen corresponding path program 1 times [2024-09-25 00:21:14,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:14,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178678966] [2024-09-25 00:21:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:14,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:14,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463889101] [2024-09-25 00:21:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:14,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:14,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:14,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:14,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 00:21:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:14,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-25 00:21:14,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:14,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:14,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:21:14,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:16,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178678966] [2024-09-25 00:21:16,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463889101] [2024-09-25 00:21:16,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463889101] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:16,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:21:16,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-25 00:21:16,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201655932] [2024-09-25 00:21:16,422 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:16,422 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:21:16,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:16,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:21:16,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-25 00:21:16,424 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-25 00:21:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:16,632 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2024-09-25 00:21:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:21:16,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-09-25 00:21:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:16,634 INFO L225 Difference]: With dead ends: 67 [2024-09-25 00:21:16,634 INFO L226 Difference]: Without dead ends: 51 [2024-09-25 00:21:16,635 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-25 00:21:16,635 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:16,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:21:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-25 00:21:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-25 00:21:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.096774193548387) internal successors, (34), 33 states have internal predecessors, (34), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-25 00:21:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-09-25 00:21:16,650 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 28 [2024-09-25 00:21:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:16,650 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-09-25 00:21:16,650 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-25 00:21:16,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-09-25 00:21:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-25 00:21:16,651 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:16,652 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:16,668 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 00:21:16,855 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:16,856 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:16,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash 846345899, now seen corresponding path program 1 times [2024-09-25 00:21:16,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:16,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460958827] [2024-09-25 00:21:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:16,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585710741] [2024-09-25 00:21:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:16,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:16,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:16,896 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:16,904 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 00:21:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:17,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-25 00:21:17,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:17,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:17,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:17,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:17,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-25 00:21:17,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 00:21:17,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:18,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2024-09-25 00:21:18,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2024-09-25 00:21:26,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:26,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460958827] [2024-09-25 00:21:26,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:26,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585710741] [2024-09-25 00:21:26,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585710741] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:26,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:21:26,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-25 00:21:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721748423] [2024-09-25 00:21:26,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:26,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 00:21:26,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 00:21:26,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=437, Unknown=1, NotChecked=0, Total=506 [2024-09-25 00:21:26,694 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 00:21:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:27,171 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2024-09-25 00:21:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 00:21:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 34 [2024-09-25 00:21:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:27,172 INFO L225 Difference]: With dead ends: 60 [2024-09-25 00:21:27,172 INFO L226 Difference]: Without dead ends: 58 [2024-09-25 00:21:27,173 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=102, Invalid=653, Unknown=1, NotChecked=0, Total=756 [2024-09-25 00:21:27,174 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:27,174 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:21:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-25 00:21:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2024-09-25 00:21:27,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-25 00:21:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-09-25 00:21:27,193 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 34 [2024-09-25 00:21:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:27,194 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-09-25 00:21:27,194 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 00:21:27,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-09-25 00:21:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 00:21:27,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:27,196 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:27,212 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 00:21:27,399 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:27,400 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:27,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:27,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1394095128, now seen corresponding path program 1 times [2024-09-25 00:21:27,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:27,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732973012] [2024-09-25 00:21:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:27,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:27,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858368325] [2024-09-25 00:21:27,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:27,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:27,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:27,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:27,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 00:21:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:27,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-25 00:21:27,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:27,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:27,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:27,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:27,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 00:21:27,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:28,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-09-25 00:21:28,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 20 [2024-09-25 00:21:28,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732973012] [2024-09-25 00:21:28,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858368325] [2024-09-25 00:21:28,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858368325] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:28,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:21:28,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-25 00:21:28,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011044875] [2024-09-25 00:21:28,323 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:28,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-25 00:21:28,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-25 00:21:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-25 00:21:28,324 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 00:21:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:28,677 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-09-25 00:21:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 00:21:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2024-09-25 00:21:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:28,679 INFO L225 Difference]: With dead ends: 65 [2024-09-25 00:21:28,679 INFO L226 Difference]: Without dead ends: 47 [2024-09-25 00:21:28,679 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-25 00:21:28,680 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:28,680 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 72 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:21:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-25 00:21:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-25 00:21:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-25 00:21:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-09-25 00:21:28,690 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 40 [2024-09-25 00:21:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:28,691 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-09-25 00:21:28,691 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 00:21:28,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-09-25 00:21:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 00:21:28,692 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:28,692 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:28,706 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 00:21:28,892 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:28,893 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:28,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 711386751, now seen corresponding path program 2 times [2024-09-25 00:21:28,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:28,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327777115] [2024-09-25 00:21:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:28,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:28,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135777389] [2024-09-25 00:21:28,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:21:28,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:28,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:28,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:28,972 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 00:21:29,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:21:29,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:21:29,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-09-25 00:21:29,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:29,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:29,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:29,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:29,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-25 00:21:29,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-25 00:21:29,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-25 00:21:29,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:31,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-09-25 00:21:31,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 35 [2024-09-25 00:21:31,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:31,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327777115] [2024-09-25 00:21:31,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:31,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135777389] [2024-09-25 00:21:31,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135777389] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:31,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:21:31,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-25 00:21:31,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913333288] [2024-09-25 00:21:31,531 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:31,532 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 00:21:31,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 00:21:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2024-09-25 00:21:31,533 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 00:21:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:31,995 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2024-09-25 00:21:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 00:21:31,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-09-25 00:21:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:31,997 INFO L225 Difference]: With dead ends: 58 [2024-09-25 00:21:31,997 INFO L226 Difference]: Without dead ends: 56 [2024-09-25 00:21:31,997 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-09-25 00:21:31,998 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:31,998 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 68 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:21:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-25 00:21:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-09-25 00:21:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-25 00:21:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-09-25 00:21:32,017 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 46 [2024-09-25 00:21:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:32,018 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-09-25 00:21:32,018 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 00:21:32,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-09-25 00:21:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-25 00:21:32,021 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:32,021 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:32,039 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 00:21:32,225 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:32,225 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:32,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:32,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1963665965, now seen corresponding path program 3 times [2024-09-25 00:21:32,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:32,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165572733] [2024-09-25 00:21:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:32,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:32,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685757991] [2024-09-25 00:21:32,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:21:32,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:32,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:32,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:32,308 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 00:21:32,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:21:32,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:21:32,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 204 conjuncts are in the unsatisfiable core [2024-09-25 00:21:32,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:32,768 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 11 treesize of output 7 [2024-09-25 00:21:32,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:32,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:32,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:33,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-25 00:21:33,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 00:21:33,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:36,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-09-25 00:21:36,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 35 [2024-09-25 00:21:42,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:42,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165572733] [2024-09-25 00:21:42,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:42,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685757991] [2024-09-25 00:21:42,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685757991] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:42,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:21:42,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-25 00:21:42,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852026576] [2024-09-25 00:21:42,034 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:42,034 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 00:21:42,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 00:21:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2024-09-25 00:21:42,035 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 00:21:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:42,962 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-25 00:21:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:21:42,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2024-09-25 00:21:42,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:42,964 INFO L225 Difference]: With dead ends: 66 [2024-09-25 00:21:42,964 INFO L226 Difference]: Without dead ends: 64 [2024-09-25 00:21:42,966 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 00:21:42,967 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:42,968 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 129 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 00:21:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-25 00:21:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2024-09-25 00:21:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-25 00:21:42,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2024-09-25 00:21:42,982 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 58 [2024-09-25 00:21:42,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:42,983 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2024-09-25 00:21:42,983 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 00:21:42,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:42,983 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2024-09-25 00:21:42,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-25 00:21:42,984 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:42,985 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:43,007 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 00:21:43,185 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:43,186 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:43,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash 647455911, now seen corresponding path program 4 times [2024-09-25 00:21:43,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:43,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828401158] [2024-09-25 00:21:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:43,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:43,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14190805] [2024-09-25 00:21:43,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:21:43,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:43,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:43,254 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 00:21:44,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:21:44,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:21:44,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 223 conjuncts are in the unsatisfiable core [2024-09-25 00:21:44,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:44,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:44,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:44,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:44,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:44,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-25 00:21:45,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-25 00:21:45,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:48,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-09-25 00:21:48,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-25 00:21:49,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:49,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828401158] [2024-09-25 00:21:49,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:49,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14190805] [2024-09-25 00:21:49,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14190805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:49,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:21:49,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-25 00:21:49,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141447932] [2024-09-25 00:21:49,434 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:49,435 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 00:21:49,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:49,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 00:21:49,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2024-09-25 00:21:49,436 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 10 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-25 00:21:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:50,576 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-09-25 00:21:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 00:21:50,577 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 10 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 70 [2024-09-25 00:21:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:50,578 INFO L225 Difference]: With dead ends: 68 [2024-09-25 00:21:50,578 INFO L226 Difference]: Without dead ends: 66 [2024-09-25 00:21:50,579 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 00:21:50,579 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:50,579 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 124 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 00:21:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-25 00:21:50,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2024-09-25 00:21:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (21), 12 states have call predecessors, (21), 9 states have call successors, (21) [2024-09-25 00:21:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-09-25 00:21:50,594 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 70 [2024-09-25 00:21:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:50,595 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-09-25 00:21:50,595 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 10 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-25 00:21:50,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-09-25 00:21:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-25 00:21:50,596 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:50,597 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:50,607 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 00:21:50,797 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-09-25 00:21:50,797 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:50,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:50,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1254705940, now seen corresponding path program 2 times [2024-09-25 00:21:50,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:50,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093211172] [2024-09-25 00:21:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:50,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:50,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528228801] [2024-09-25 00:21:50,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:21:50,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:50,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:50,845 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:50,856 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 00:21:51,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:21:51,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:21:51,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-25 00:21:51,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:51,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:51,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:51,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:51,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:51,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-25 00:21:51,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:52,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 24 [2024-09-25 00:21:52,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-09-25 00:21:55,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093211172] [2024-09-25 00:21:55,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:55,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528228801] [2024-09-25 00:21:55,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528228801] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:55,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:21:55,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-25 00:21:55,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813723960] [2024-09-25 00:21:55,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:55,362 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 00:21:55,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 00:21:55,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-09-25 00:21:55,363 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 00:21:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:55,893 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-09-25 00:21:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 00:21:55,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 52 [2024-09-25 00:21:55,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:55,894 INFO L225 Difference]: With dead ends: 73 [2024-09-25 00:21:55,894 INFO L226 Difference]: Without dead ends: 59 [2024-09-25 00:21:55,896 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-09-25 00:21:55,896 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:55,896 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 313 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 00:21:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-25 00:21:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-25 00:21:55,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (19), 12 states have call predecessors, (19), 9 states have call successors, (19) [2024-09-25 00:21:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-25 00:21:55,909 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 52 [2024-09-25 00:21:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:55,909 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-25 00:21:55,909 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 00:21:55,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-25 00:21:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-25 00:21:55,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:55,910 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:55,931 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 00:21:56,111 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 00:21:56,111 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:56,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1802374405, now seen corresponding path program 5 times [2024-09-25 00:21:56,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:56,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301279077] [2024-09-25 00:21:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:56,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:56,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833105200] [2024-09-25 00:21:56,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:21:56,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:56,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:56,157 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:56,158 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 00:21:56,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-25 00:21:56,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:21:56,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 214 conjuncts are in the unsatisfiable core [2024-09-25 00:21:56,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:56,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:56,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:56,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:57,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-25 00:21:57,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-25 00:21:57,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 00:21:57,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:22:01,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-09-25 00:22:01,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-25 00:22:02,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:22:02,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301279077] [2024-09-25 00:22:02,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:22:02,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833105200] [2024-09-25 00:22:02,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833105200] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:02,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:22:02,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-25 00:22:02,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695199422] [2024-09-25 00:22:02,632 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:22:02,633 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 00:22:02,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:22:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 00:22:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2024-09-25 00:22:02,634 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-25 00:22:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:03,386 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2024-09-25 00:22:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:22:03,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 82 [2024-09-25 00:22:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:03,388 INFO L225 Difference]: With dead ends: 70 [2024-09-25 00:22:03,388 INFO L226 Difference]: Without dead ends: 68 [2024-09-25 00:22:03,389 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 00:22:03,390 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:03,390 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 135 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 00:22:03,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-25 00:22:03,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2024-09-25 00:22:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 12 states have return successors, (22), 13 states have call predecessors, (22), 9 states have call successors, (22) [2024-09-25 00:22:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2024-09-25 00:22:03,405 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 82 [2024-09-25 00:22:03,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:03,405 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2024-09-25 00:22:03,405 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-25 00:22:03,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2024-09-25 00:22:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-25 00:22:03,406 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:03,406 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:22:03,423 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 00:22:03,607 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:03,607 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:03,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:03,607 INFO L85 PathProgramCache]: Analyzing trace with hash 81843520, now seen corresponding path program 3 times [2024-09-25 00:22:03,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:03,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382042871] [2024-09-25 00:22:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:03,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:22:03,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777857467] [2024-09-25 00:22:03,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:22:03,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:03,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:22:03,663 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:22:03,667 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 00:22:04,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:22:04,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:22:04,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-09-25 00:22:04,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:22:04,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:04,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:04,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2024-09-25 00:22:04,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:22:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 00:22:04,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:22:06,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 24 [2024-09-25 00:22:06,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-09-25 00:22:56,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:22:56,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382042871] [2024-09-25 00:22:56,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:22:56,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777857467] [2024-09-25 00:22:56,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777857467] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:56,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:22:56,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-25 00:22:56,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606666942] [2024-09-25 00:22:56,066 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:22:56,067 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 00:22:56,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:22:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 00:22:56,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=476, Unknown=8, NotChecked=0, Total=552 [2024-09-25 00:22:56,068 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 17 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-25 00:22:56,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:56,958 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-09-25 00:22:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:22:56,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 64 [2024-09-25 00:22:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:56,959 INFO L225 Difference]: With dead ends: 75 [2024-09-25 00:22:56,959 INFO L226 Difference]: Without dead ends: 61 [2024-09-25 00:22:56,960 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=130, Invalid=854, Unknown=8, NotChecked=0, Total=992 [2024-09-25 00:22:56,960 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:56,961 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 355 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 00:22:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-25 00:22:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-09-25 00:22:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 12 states have return successors, (20), 13 states have call predecessors, (20), 9 states have call successors, (20) [2024-09-25 00:22:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-09-25 00:22:56,982 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 64 [2024-09-25 00:22:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:56,982 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-09-25 00:22:56,982 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-25 00:22:56,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-09-25 00:22:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-25 00:22:56,983 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:56,983 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:22:57,000 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-25 00:22:57,184 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-25 00:22:57,184 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:57,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash -286269233, now seen corresponding path program 6 times [2024-09-25 00:22:57,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:57,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103365365] [2024-09-25 00:22:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:57,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:22:57,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107380346] [2024-09-25 00:22:57,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:22:57,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:57,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:22:57,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:22:57,251 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 00:22:58,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-25 00:22:58,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:22:58,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 257 conjuncts are in the unsatisfiable core [2024-09-25 00:22:58,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:22:58,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:58,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:58,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:22:59,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-25 00:22:59,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:22:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-25 00:22:59,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:23:04,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-09-25 00:23:04,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-25 00:23:06,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:23:06,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103365365] [2024-09-25 00:23:06,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:23:06,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107380346] [2024-09-25 00:23:06,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107380346] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:23:06,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:23:06,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-25 00:23:06,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66242222] [2024-09-25 00:23:06,002 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:23:06,003 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 00:23:06,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:23:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 00:23:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2024-09-25 00:23:06,004 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 23 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-25 00:23:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:23:06,940 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2024-09-25 00:23:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 00:23:06,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) Word has length 94 [2024-09-25 00:23:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:23:06,941 INFO L225 Difference]: With dead ends: 72 [2024-09-25 00:23:06,941 INFO L226 Difference]: Without dead ends: 70 [2024-09-25 00:23:06,942 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=131, Invalid=1351, Unknown=0, NotChecked=0, Total=1482 [2024-09-25 00:23:06,942 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 00:23:06,942 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 169 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 00:23:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-25 00:23:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2024-09-25 00:23:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (23), 14 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-25 00:23:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2024-09-25 00:23:06,957 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 94 [2024-09-25 00:23:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:23:06,957 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2024-09-25 00:23:06,957 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-25 00:23:06,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:23:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2024-09-25 00:23:06,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-25 00:23:06,958 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:23:06,958 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:23:06,976 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-25 00:23:07,158 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:23:07,159 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:23:07,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:23:07,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1653208340, now seen corresponding path program 4 times [2024-09-25 00:23:07,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:23:07,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834545654] [2024-09-25 00:23:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:23:07,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:23:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:23:07,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952440938] [2024-09-25 00:23:07,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:23:07,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:23:07,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:23:07,215 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:23:07,225 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 00:23:08,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:23:08,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:23:08,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-09-25 00:23:08,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:23:08,285 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 17 treesize of output 9 [2024-09-25 00:23:08,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2024-09-25 00:23:08,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 00:23:08,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 51 [2024-09-25 00:23:08,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-09-25 00:23:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 64 proven. 38 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-25 00:23:08,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:23:10,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:23:10,430 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 498 treesize of output 497 [2024-09-25 00:23:18,511 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse2 (select .cse1 c_func_to_recursive_line_26_to_34_0_~y.offset))) (or (and (= (let ((.cse0 (select (select (store |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse1 c_func_to_recursive_line_26_to_34_0_~y.offset (+ 3 .cse2))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* (* .cse0 .cse0 .cse0) 2) (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0))) (+ (* 14 (* .cse2 .cse2 .cse2)) 144 (* .cse2 .cse2 .cse2 .cse2) (* .cse2 168) (* (* .cse2 .cse2) 73))) (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base) (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (not (= (mod (+ (* 3 .cse2 .cse2) (* 3 .cse2 .cse2 .cse2 .cse2) (* 2 .cse2 .cse2 .cse2)) 4) 0))))) is different from false [2024-09-25 00:23:26,567 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-25 00:23:34,607 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse1 (select .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (and (or (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_35| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_31| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (= (let ((.cse0 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse0 .cse0) (* 2 (* .cse0 .cse0 .cse0)) (* .cse0 .cse0 .cse0 .cse0))) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_35|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_31|) 4))) (= (mod (+ (* 3 .cse1 .cse1 .cse1 .cse1) (* 2 .cse1 .cse1 .cse1) (* 3 .cse1 .cse1)) 4) 0)) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (or (= (let ((.cse2 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse2 .cse2) (* 2 (* .cse2 .cse2 .cse2)) (* .cse2 .cse2 .cse2 .cse2))) (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 4)) (not (= (+ (* .cse1 .cse1 .cse1 .cse1) (* 14 (* .cse1 .cse1 .cse1)) (* .cse1 168) 144 (* 73 (* .cse1 .cse1))) (let ((.cse3 (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ 3 .cse1))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* 2 (* .cse3 .cse3 .cse3)) (* .cse3 .cse3 .cse3 .cse3) (* .cse3 .cse3)))))))))) is different from true [2024-09-25 00:23:42,622 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-25 00:24:09,029 WARN L293 SmtUtils]: Spent 21.92s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-09-25 00:24:09,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:24:09,030 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 1224 treesize of output 1237 [2024-09-25 00:24:21,276 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-25 00:24:37,299 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-25 00:24:53,319 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-25 00:25:05,338 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification. DAG size of input: 22 DAG size of output: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-25 00:25:13,353 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-25 00:25:21,367 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-25 00:25:37,385 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-25 00:25:45,400 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)