./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/prefixsum_iter.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 de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/prefixsum_iter.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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --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-de32597-m [2024-09-17 18:31:00,505 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:31:00,561 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:31:00,566 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:31:00,567 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:31:00,595 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:31:00,595 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:31:00,596 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:31:00,596 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:31:00,599 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:31:00,600 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:31:00,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:31:00,600 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:31:00,601 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:31:00,601 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:31:00,601 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:31:00,601 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:31:00,601 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:31:00,602 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:31:00,602 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:31:00,602 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:31:00,605 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:31:00,606 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:31:00,606 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:31:00,606 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:31:00,606 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:31:00,606 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:31:00,607 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:31:00,607 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:31:00,607 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:31:00,607 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:31:00,607 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:31:00,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:31:00,608 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:31:00,609 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:31:00,609 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:31:00,609 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:31:00,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:31:00,610 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:31:00,610 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:31:00,610 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:31:00,610 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:31:00,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:31:00,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:31:00,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:31:00,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:31:00,843 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:31:00,844 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:31:00,845 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-09-17 18:31:02,107 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:31:02,274 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:31:02,275 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-09-17 18:31:02,282 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/709eeb38e/56788c55d82d4f7ba79d32e7c21ee0ba/FLAG3a1f44f33 [2024-09-17 18:31:02,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/709eeb38e/56788c55d82d4f7ba79d32e7c21ee0ba [2024-09-17 18:31:02,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:31:02,675 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:31:02,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:31:02,677 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:31:02,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:31:02,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:02,682 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722c5c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02, skipping insertion in model container [2024-09-17 18:31:02,682 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:02,700 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:31:02,831 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/verifythis/prefixsum_iter.c[526,539] [2024-09-17 18:31:02,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:31:02,883 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:31:02,892 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/verifythis/prefixsum_iter.c[526,539] [2024-09-17 18:31:02,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:31:02,948 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:31:02,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02 WrapperNode [2024-09-17 18:31:02,951 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:31:02,952 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:31:02,953 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:31:02,953 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:31:02,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:02,973 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:02,980 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:31:02,981 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:31:02,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:31:02,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:31:02,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:31:03,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:03,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:03,006 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:03,019 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-09-17 18:31:03,019 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:03,019 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:03,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:03,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:03,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:03,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:03,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:31:03,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:31:03,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:31:03,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:31:03,033 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (1/1) ... [2024-09-17 18:31:03,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:31:03,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:31:03,066 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) [2024-09-17 18:31:03,068 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 [2024-09-17 18:31:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:31:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 18:31:03,101 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 18:31:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:31:03,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:31:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:31:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-17 18:31:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-09-17 18:31:03,101 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-09-17 18:31:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-09-17 18:31:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-09-17 18:31:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-17 18:31:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-17 18:31:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:31:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:31:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-17 18:31:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2024-09-17 18:31:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2024-09-17 18:31:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-09-17 18:31:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-09-17 18:31:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:31:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:31:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-17 18:31:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-17 18:31:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-17 18:31:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-17 18:31:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:31:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:31:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-17 18:31:03,169 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:31:03,171 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:31:03,365 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2024-09-17 18:31:03,365 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:31:03,391 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:31:03,391 INFO L318 CfgBuilder]: Removed 7 assume(true) statements. [2024-09-17 18:31:03,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:31:03 BoogieIcfgContainer [2024-09-17 18:31:03,392 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:31:03,394 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:31:03,394 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:31:03,396 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:31:03,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:31:02" (1/3) ... [2024-09-17 18:31:03,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:31:03, skipping insertion in model container [2024-09-17 18:31:03,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:31:02" (2/3) ... [2024-09-17 18:31:03,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:31:03, skipping insertion in model container [2024-09-17 18:31:03,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:31:03" (3/3) ... [2024-09-17 18:31:03,399 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2024-09-17 18:31:03,411 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:31:03,411 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:31:03,456 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:31:03,465 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;@13dcb9fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:31:03,465 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:31:03,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 states have internal predecessors, (52), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:31:03,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-17 18:31:03,481 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:31:03,482 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:31:03,483 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:31:03,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:03,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1085934665, now seen corresponding path program 1 times [2024-09-17 18:31:03,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:31:03,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089005862] [2024-09-17 18:31:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:03,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:31:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:03,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:31:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:03,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:31:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:03,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:31:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:03,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:31:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:03,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:31:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:03,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:31:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:03,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:31:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:03,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:31:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:31:03,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:31:03,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089005862] [2024-09-17 18:31:03,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089005862] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:31:03,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:31:03,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 18:31:03,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342309087] [2024-09-17 18:31:03,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:31:03,741 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 18:31:03,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:31:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 18:31:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 18:31:03,758 INFO L87 Difference]: Start difference. First operand has 57 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 states have internal predecessors, (52), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:31:03,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:31:03,873 INFO L93 Difference]: Finished difference Result 113 states and 157 transitions. [2024-09-17 18:31:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 18:31:03,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-17 18:31:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:31:03,882 INFO L225 Difference]: With dead ends: 113 [2024-09-17 18:31:03,882 INFO L226 Difference]: Without dead ends: 56 [2024-09-17 18:31:03,884 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 18:31:03,886 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:31:03,887 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 49 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:31:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-17 18:31:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-09-17 18:31:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:31:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-09-17 18:31:03,917 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 49 [2024-09-17 18:31:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:31:03,917 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-09-17 18:31:03,917 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:31:03,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-09-17 18:31:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-17 18:31:03,920 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:31:03,920 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:31:03,920 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:31:03,920 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:31:03,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:03,921 INFO L85 PathProgramCache]: Analyzing trace with hash -136188297, now seen corresponding path program 1 times [2024-09-17 18:31:03,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:31:03,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896294652] [2024-09-17 18:31:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:03,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:31:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:31:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:31:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:31:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:31:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:31:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:31:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:31:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:31:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:31:04,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:31:04,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896294652] [2024-09-17 18:31:04,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896294652] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:31:04,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:31:04,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-17 18:31:04,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282497982] [2024-09-17 18:31:04,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:31:04,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:31:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:31:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:31:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:31:04,232 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:31:04,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:31:04,388 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2024-09-17 18:31:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:31:04,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-17 18:31:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:31:04,390 INFO L225 Difference]: With dead ends: 72 [2024-09-17 18:31:04,390 INFO L226 Difference]: Without dead ends: 57 [2024-09-17 18:31:04,390 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:31:04,391 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:31:04,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 167 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:31:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-17 18:31:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-09-17 18:31:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:31:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-09-17 18:31:04,403 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 49 [2024-09-17 18:31:04,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:31:04,404 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-09-17 18:31:04,404 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:31:04,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-09-17 18:31:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-17 18:31:04,407 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:31:04,407 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:31:04,407 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 18:31:04,407 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:31:04,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash -963858507, now seen corresponding path program 1 times [2024-09-17 18:31:04,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:31:04,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915813681] [2024-09-17 18:31:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:04,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:31:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:31:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:31:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:31:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:04,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:31:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:05,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:31:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:05,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:31:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:05,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:31:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:05,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:31:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:31:05,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:31:05,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915813681] [2024-09-17 18:31:05,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915813681] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:31:05,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226548778] [2024-09-17 18:31:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:05,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:05,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:31:05,103 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) [2024-09-17 18:31:05,115 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:31:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:05,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-17 18:31:05,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:31:05,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-17 18:31:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:31:05,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:31:05,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-09-17 18:31:05,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-09-17 18:31:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:31:05,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226548778] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:31:05,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:31:05,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 27 [2024-09-17 18:31:05,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154014576] [2024-09-17 18:31:05,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:31:05,681 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 18:31:05,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:31:05,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 18:31:05,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:31:05,685 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 8 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-17 18:31:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:31:06,574 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2024-09-17 18:31:06,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-17 18:31:06,574 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 8 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 50 [2024-09-17 18:31:06,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:31:06,576 INFO L225 Difference]: With dead ends: 102 [2024-09-17 18:31:06,576 INFO L226 Difference]: Without dead ends: 100 [2024-09-17 18:31:06,577 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=1942, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 18:31:06,578 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 142 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:31:06,578 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 297 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:31:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-17 18:31:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2024-09-17 18:31:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 57 states have internal predecessors, (68), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (18), 12 states have call predecessors, (18), 13 states have call successors, (18) [2024-09-17 18:31:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2024-09-17 18:31:06,593 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 50 [2024-09-17 18:31:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:31:06,593 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2024-09-17 18:31:06,594 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 8 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-17 18:31:06,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2024-09-17 18:31:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-17 18:31:06,595 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:31:06,595 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:31:06,611 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-17 18:31:06,796 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:06,797 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:31:06,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:06,797 INFO L85 PathProgramCache]: Analyzing trace with hash 384710234, now seen corresponding path program 1 times [2024-09-17 18:31:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:31:06,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79346448] [2024-09-17 18:31:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:06,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:31:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:06,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:31:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:06,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:31:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:06,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:31:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:06,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:31:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:06,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:31:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:06,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:31:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:06,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:31:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:06,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:31:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 18:31:07,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:31:07,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79346448] [2024-09-17 18:31:07,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79346448] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:31:07,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309710047] [2024-09-17 18:31:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:07,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:31:07,017 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) [2024-09-17 18:31:07,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:31:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 18:31:07,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:31:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-17 18:31:07,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:31:07,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309710047] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:31:07,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:31:07,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 14 [2024-09-17 18:31:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127903106] [2024-09-17 18:31:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:31:07,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-17 18:31:07,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:31:07,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-17 18:31:07,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-17 18:31:07,198 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:31:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:31:07,318 INFO L93 Difference]: Finished difference Result 123 states and 156 transitions. [2024-09-17 18:31:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:31:07,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2024-09-17 18:31:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:31:07,322 INFO L225 Difference]: With dead ends: 123 [2024-09-17 18:31:07,322 INFO L226 Difference]: Without dead ends: 102 [2024-09-17 18:31:07,323 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-17 18:31:07,324 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:31:07,324 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 332 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:31:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-17 18:31:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2024-09-17 18:31:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 65 states have internal predecessors, (76), 17 states have call successors, (17), 12 states have call predecessors, (17), 13 states have return successors, (23), 13 states have call predecessors, (23), 14 states have call successors, (23) [2024-09-17 18:31:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2024-09-17 18:31:07,343 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 55 [2024-09-17 18:31:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:31:07,344 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2024-09-17 18:31:07,344 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:31:07,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2024-09-17 18:31:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-17 18:31:07,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:31:07,346 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:31:07,361 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-17 18:31:07,547 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:07,548 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:31:07,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash -336622505, now seen corresponding path program 1 times [2024-09-17 18:31:07,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:31:07,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117364503] [2024-09-17 18:31:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:07,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:31:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:31:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:31:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:31:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:31:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:31:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:31:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:31:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:31:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:31:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:31:07,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:31:07,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117364503] [2024-09-17 18:31:07,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117364503] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:31:07,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654523286] [2024-09-17 18:31:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:07,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:07,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:31:07,695 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) [2024-09-17 18:31:07,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:31:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:07,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 18:31:07,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:31:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:31:07,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:31:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:31:07,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654523286] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:31:07,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:31:07,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2024-09-17 18:31:07,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039081108] [2024-09-17 18:31:07,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:31:07,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-17 18:31:07,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:31:07,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-17 18:31:07,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:31:07,873 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-17 18:31:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:31:08,057 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2024-09-17 18:31:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:31:08,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 57 [2024-09-17 18:31:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:31:08,059 INFO L225 Difference]: With dead ends: 114 [2024-09-17 18:31:08,059 INFO L226 Difference]: Without dead ends: 95 [2024-09-17 18:31:08,059 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:31:08,060 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:31:08,060 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 311 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:31:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-17 18:31:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-09-17 18:31:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 67 states have internal predecessors, (78), 19 states have call successors, (19), 13 states have call predecessors, (19), 13 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2024-09-17 18:31:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2024-09-17 18:31:08,089 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 57 [2024-09-17 18:31:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:31:08,089 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2024-09-17 18:31:08,089 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-17 18:31:08,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2024-09-17 18:31:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-17 18:31:08,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:31:08,097 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:31:08,116 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 18:31:08,298 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:08,298 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:31:08,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:08,299 INFO L85 PathProgramCache]: Analyzing trace with hash -254005355, now seen corresponding path program 2 times [2024-09-17 18:31:08,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:31:08,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045780252] [2024-09-17 18:31:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:08,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:31:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:08,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:31:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:08,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:31:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:08,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:31:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:08,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:31:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:08,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:31:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:08,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:31:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:08,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:31:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:08,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:31:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:08,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:31:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-17 18:31:08,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:31:08,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045780252] [2024-09-17 18:31:08,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045780252] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:31:08,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601942889] [2024-09-17 18:31:08,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:31:08,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:08,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:31:08,429 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) [2024-09-17 18:31:08,430 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:31:08,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:31:08,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:31:08,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:31:08,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:31:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-17 18:31:08,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:31:08,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601942889] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:31:08,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:31:08,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2024-09-17 18:31:08,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981518447] [2024-09-17 18:31:08,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:31:08,617 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-17 18:31:08,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:31:08,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-17 18:31:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:31:08,618 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-17 18:31:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:31:08,694 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2024-09-17 18:31:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 18:31:08,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-17 18:31:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:31:08,695 INFO L225 Difference]: With dead ends: 114 [2024-09-17 18:31:08,697 INFO L226 Difference]: Without dead ends: 93 [2024-09-17 18:31:08,698 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:31:08,698 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:31:08,698 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 258 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:31:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-17 18:31:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2024-09-17 18:31:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 62 states have internal predecessors, (73), 18 states have call successors, (18), 13 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2024-09-17 18:31:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2024-09-17 18:31:08,712 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 58 [2024-09-17 18:31:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:31:08,714 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2024-09-17 18:31:08,714 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-17 18:31:08,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2024-09-17 18:31:08,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-17 18:31:08,716 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:31:08,716 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:31:08,728 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 18:31:08,920 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:08,921 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:31:08,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:08,921 INFO L85 PathProgramCache]: Analyzing trace with hash -764459887, now seen corresponding path program 1 times [2024-09-17 18:31:08,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:31:08,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203346931] [2024-09-17 18:31:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:08,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:31:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:09,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:31:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:09,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:31:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:09,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:31:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:09,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:31:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:09,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:31:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:09,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:31:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:09,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:31:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:09,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:31:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-17 18:31:09,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:31:09,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203346931] [2024-09-17 18:31:09,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203346931] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:31:09,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155237244] [2024-09-17 18:31:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:09,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:09,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:31:09,081 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) [2024-09-17 18:31:09,087 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:31:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:09,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 18:31:09,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:31:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-17 18:31:09,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:31:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-17 18:31:09,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155237244] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:31:09,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:31:09,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2024-09-17 18:31:09,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622649782] [2024-09-17 18:31:09,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:31:09,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:31:09,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:31:09,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:31:09,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:31:09,458 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:31:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:31:09,732 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2024-09-17 18:31:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:31:09,732 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2024-09-17 18:31:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:31:09,733 INFO L225 Difference]: With dead ends: 118 [2024-09-17 18:31:09,733 INFO L226 Difference]: Without dead ends: 95 [2024-09-17 18:31:09,734 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:31:09,734 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:31:09,735 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 206 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:31:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-17 18:31:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2024-09-17 18:31:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 58 states have internal predecessors, (68), 18 states have call successors, (18), 12 states have call predecessors, (18), 10 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2024-09-17 18:31:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-09-17 18:31:09,744 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 58 [2024-09-17 18:31:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:31:09,744 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-09-17 18:31:09,745 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:31:09,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-09-17 18:31:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-17 18:31:09,745 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:31:09,746 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:31:09,759 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 18:31:09,946 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-17 18:31:09,947 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:31:09,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1823892196, now seen corresponding path program 1 times [2024-09-17 18:31:09,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:31:09,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664981724] [2024-09-17 18:31:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:09,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:31:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:10,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:31:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:10,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:31:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:10,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:31:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:10,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:31:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:10,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:31:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:10,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:31:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:10,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:31:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:10,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:31:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-17 18:31:10,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:31:10,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664981724] [2024-09-17 18:31:10,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664981724] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:31:10,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815481920] [2024-09-17 18:31:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:10,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:10,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:31:10,084 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) [2024-09-17 18:31:10,085 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:31:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:10,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:31:10,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:31:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-17 18:31:10,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:31:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-17 18:31:10,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815481920] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:31:10,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:31:10,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 12 [2024-09-17 18:31:10,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193620335] [2024-09-17 18:31:10,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:31:10,269 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-17 18:31:10,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:31:10,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-17 18:31:10,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-09-17 18:31:10,270 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-17 18:31:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:31:10,417 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2024-09-17 18:31:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 18:31:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-17 18:31:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:31:10,418 INFO L225 Difference]: With dead ends: 104 [2024-09-17 18:31:10,418 INFO L226 Difference]: Without dead ends: 75 [2024-09-17 18:31:10,419 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:31:10,419 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:31:10,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 151 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:31:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-17 18:31:10,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-09-17 18:31:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 49 states have internal predecessors, (58), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-17 18:31:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2024-09-17 18:31:10,433 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 58 [2024-09-17 18:31:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:31:10,433 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2024-09-17 18:31:10,434 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-17 18:31:10,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2024-09-17 18:31:10,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-17 18:31:10,434 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:31:10,434 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:31:10,450 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 18:31:10,635 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:10,636 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:31:10,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:31:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash 90056550, now seen corresponding path program 2 times [2024-09-17 18:31:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:31:10,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070458987] [2024-09-17 18:31:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:31:10,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:31:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:11,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:31:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:11,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:31:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:11,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:31:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:11,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:31:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:11,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:31:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:11,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:31:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:11,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:31:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:11,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:31:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:31:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 18:31:11,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:31:11,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070458987] [2024-09-17 18:31:11,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070458987] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:31:11,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956214267] [2024-09-17 18:31:11,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:31:11,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:31:11,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:31:11,509 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) [2024-09-17 18:31:11,512 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:31:11,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:31:11,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:31:11,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-17 18:31:11,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:31:11,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-17 18:31:11,970 INFO L349 Elim1Store]: treesize reduction 82, result has 28.7 percent of original size [2024-09-17 18:31:11,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 50 [2024-09-17 18:31:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 18:31:12,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:31:12,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 18:31:12,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 136 treesize of output 144 [2024-09-17 18:31:12,631 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:12,632 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:12,634 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:12,635 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:13,048 INFO L349 Elim1Store]: treesize reduction 384, result has 42.4 percent of original size [2024-09-17 18:31:13,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 237 treesize of output 831 [2024-09-17 18:31:13,150 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 140 treesize of output 119 [2024-09-17 18:31:13,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2024-09-17 18:31:15,009 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,015 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,017 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,019 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,026 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,119 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,122 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,122 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,125 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,129 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,131 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,134 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 18:31:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver