./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 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-27b4987-m [2024-09-21 11:39:00,544 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:39:00,614 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:39:00,622 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:39:00,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:39:00,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:39:00,654 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:39:00,655 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:39:00,656 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:39:00,660 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:39:00,661 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:39:00,661 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:39:00,662 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:39:00,663 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:39:00,664 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:39:00,664 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:39:00,664 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:39:00,664 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:39:00,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:39:00,665 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:39:00,665 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:39:00,666 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:39:00,666 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:39:00,666 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:39:00,666 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:39:00,666 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:39:00,667 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:39:00,667 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:39:00,667 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:39:00,667 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:39:00,668 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:39:00,668 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:39:00,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:39:00,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:39:00,668 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:39:00,669 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:39:00,669 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:39:00,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:39:00,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:39:00,669 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:39:00,670 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:39:00,670 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:39:00,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:39:00,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:39:00,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:39:00,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:39:00,969 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:39:00,969 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:39:00,970 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-09-21 11:39:03,062 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:39:03,320 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:39:03,321 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-09-21 11:39:03,332 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a25f0092b/af99d8357602457bb2c051b9b1bb2e34/FLAG75c23c3cc [2024-09-21 11:39:03,351 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a25f0092b/af99d8357602457bb2c051b9b1bb2e34 [2024-09-21 11:39:03,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:39:03,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:39:03,358 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:39:03,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:39:03,364 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:39:03,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208e0c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03, skipping insertion in model container [2024-09-21 11:39:03,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,390 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:39:03,533 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] [2024-09-21 11:39:03,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:39:03,570 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:39:03,581 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] [2024-09-21 11:39:03,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:39:03,619 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:39:03,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03 WrapperNode [2024-09-21 11:39:03,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:39:03,622 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:39:03,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:39:03,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:39:03,630 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,643 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,651 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:39:03,652 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:39:03,653 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:39:03,653 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:39:03,653 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:39:03,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,673 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,701 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]. [2024-09-21 11:39:03,704 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,705 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,717 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,725 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,731 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,734 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:39:03,738 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:39:03,738 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:39:03,738 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:39:03,739 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (1/1) ... [2024-09-21 11:39:03,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:39:03,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:39:03,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 11:39:03,774 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 11:39:03,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:39:03,815 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 11:39:03,815 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 11:39:03,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:39:03,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:39:03,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:39:03,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 11:39:03,816 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-09-21 11:39:03,816 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-09-21 11:39:03,816 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-09-21 11:39:03,816 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-09-21 11:39:03,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 11:39:03,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 11:39:03,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:39:03,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:39:03,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-21 11:39:03,818 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2024-09-21 11:39:03,818 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2024-09-21 11:39:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-09-21 11:39:03,819 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-09-21 11:39:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:39:03,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:39:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 11:39:03,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 11:39:03,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-21 11:39:03,820 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-21 11:39:03,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:39:03,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:39:03,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 11:39:03,898 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:39:03,900 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:39:04,131 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2024-09-21 11:39:04,131 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:39:04,170 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:39:04,171 INFO L318 CfgBuilder]: Removed 7 assume(true) statements. [2024-09-21 11:39:04,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:39:04 BoogieIcfgContainer [2024-09-21 11:39:04,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:39:04,176 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:39:04,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:39:04,182 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:39:04,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:39:03" (1/3) ... [2024-09-21 11:39:04,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a62e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:39:04, skipping insertion in model container [2024-09-21 11:39:04,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:39:03" (2/3) ... [2024-09-21 11:39:04,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a62e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:39:04, skipping insertion in model container [2024-09-21 11:39:04,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:39:04" (3/3) ... [2024-09-21 11:39:04,188 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2024-09-21 11:39:04,208 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:39:04,208 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:39:04,282 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:39:04,291 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;@d416607, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:39:04,292 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:39:04,296 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) [2024-09-21 11:39:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-21 11:39:04,304 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:39:04,305 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] [2024-09-21 11:39:04,305 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:39:04,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1085934665, now seen corresponding path program 1 times [2024-09-21 11:39:04,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:39:04,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558191842] [2024-09-21 11:39:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:04,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:39:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:04,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:39:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:04,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:39:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:04,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:39:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:04,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:39:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:04,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:39:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:04,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:39:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:04,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-21 11:39:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:04,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-21 11:39:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:39:04,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:39:04,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558191842] [2024-09-21 11:39:04,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558191842] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:39:04,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:39:04,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 11:39:04,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180256597] [2024-09-21 11:39:04,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:39:04,665 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 11:39:04,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:39:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 11:39:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:39:04,685 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) [2024-09-21 11:39:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:39:04,818 INFO L93 Difference]: Finished difference Result 113 states and 157 transitions. [2024-09-21 11:39:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 11:39:04,821 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 [2024-09-21 11:39:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:39:04,829 INFO L225 Difference]: With dead ends: 113 [2024-09-21 11:39:04,829 INFO L226 Difference]: Without dead ends: 56 [2024-09-21 11:39:04,833 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 [2024-09-21 11:39:04,839 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 [2024-09-21 11:39:04,840 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] [2024-09-21 11:39:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-21 11:39:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-09-21 11:39:04,897 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) [2024-09-21 11:39:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-09-21 11:39:04,902 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 49 [2024-09-21 11:39:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:39:04,903 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-09-21 11:39:04,903 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) [2024-09-21 11:39:04,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-09-21 11:39:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-21 11:39:04,921 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:39:04,921 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] [2024-09-21 11:39:04,921 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:39:04,922 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:39:04,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash -136188297, now seen corresponding path program 1 times [2024-09-21 11:39:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:39:04,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001217016] [2024-09-21 11:39:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:39:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:05,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:39:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:05,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:39:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:05,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:39:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:05,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:39:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:05,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:39:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:05,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:39:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:05,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-21 11:39:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:05,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-21 11:39:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:39:05,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:39:05,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001217016] [2024-09-21 11:39:05,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001217016] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:39:05,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:39:05,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-21 11:39:05,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274444178] [2024-09-21 11:39:05,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:39:05,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-21 11:39:05,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:39:05,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-21 11:39:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:39:05,326 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) [2024-09-21 11:39:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:39:05,536 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2024-09-21 11:39:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 11:39:05,537 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 [2024-09-21 11:39:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:39:05,539 INFO L225 Difference]: With dead ends: 72 [2024-09-21 11:39:05,539 INFO L226 Difference]: Without dead ends: 57 [2024-09-21 11:39:05,539 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-21 11:39:05,543 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:39:05,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 167 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:39:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-21 11:39:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-09-21 11:39:05,558 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) [2024-09-21 11:39:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-09-21 11:39:05,564 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 49 [2024-09-21 11:39:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:39:05,564 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-09-21 11:39:05,564 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) [2024-09-21 11:39:05,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-09-21 11:39:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-21 11:39:05,566 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:39:05,568 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] [2024-09-21 11:39:05,568 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:39:05,568 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:39:05,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash -963858507, now seen corresponding path program 1 times [2024-09-21 11:39:05,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:39:05,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569884360] [2024-09-21 11:39:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:05,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:39:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:06,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:39:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:06,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:39:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:06,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:39:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:06,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:39:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:06,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:39:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:06,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:39:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:06,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 11:39:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:06,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-21 11:39:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:39:06,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:39:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569884360] [2024-09-21 11:39:06,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569884360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:39:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575829226] [2024-09-21 11:39:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:06,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:39:06,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:39:06,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:39:06,343 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:39:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:06,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-21 11:39:06,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:39:06,589 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 [2024-09-21 11:39:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:39:06,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:39:06,947 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 [2024-09-21 11:39:06,952 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 [2024-09-21 11:39:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:39:07,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575829226] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:39:07,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:39:07,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 27 [2024-09-21 11:39:07,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798271729] [2024-09-21 11:39:07,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:39:07,103 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-21 11:39:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:39:07,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-21 11:39:07,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2024-09-21 11:39:07,107 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) [2024-09-21 11:39:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:39:08,068 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2024-09-21 11:39:08,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 11:39:08,069 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 [2024-09-21 11:39:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:39:08,072 INFO L225 Difference]: With dead ends: 102 [2024-09-21 11:39:08,074 INFO L226 Difference]: Without dead ends: 100 [2024-09-21 11:39:08,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=1942, Unknown=0, NotChecked=0, Total=2162 [2024-09-21 11:39:08,076 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 [2024-09-21 11:39:08,077 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] [2024-09-21 11:39:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-21 11:39:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2024-09-21 11:39:08,094 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) [2024-09-21 11:39:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2024-09-21 11:39:08,096 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 50 [2024-09-21 11:39:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:39:08,097 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2024-09-21 11:39:08,097 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) [2024-09-21 11:39:08,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2024-09-21 11:39:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-21 11:39:08,099 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:39:08,099 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] [2024-09-21 11:39:08,117 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:39:08,303 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 [2024-09-21 11:39:08,304 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:39:08,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash 384710234, now seen corresponding path program 1 times [2024-09-21 11:39:08,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:39:08,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789169696] [2024-09-21 11:39:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:08,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:39:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:08,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:39:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:08,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:39:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:08,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:39:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:08,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:39:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:08,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:39:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:08,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:39:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:08,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 11:39:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:08,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-21 11:39:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-21 11:39:08,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:39:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789169696] [2024-09-21 11:39:08,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789169696] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:39:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237135454] [2024-09-21 11:39:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:08,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:39:08,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:39:08,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:39:08,664 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:39:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:08,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 11:39:08,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:39:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-21 11:39:08,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:39:08,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237135454] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:39:08,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:39:08,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 14 [2024-09-21 11:39:08,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065292177] [2024-09-21 11:39:08,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:39:08,910 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 11:39:08,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:39:08,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 11:39:08,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-21 11:39:08,912 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) [2024-09-21 11:39:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:39:09,034 INFO L93 Difference]: Finished difference Result 123 states and 156 transitions. [2024-09-21 11:39:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 11:39:09,035 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 [2024-09-21 11:39:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:39:09,038 INFO L225 Difference]: With dead ends: 123 [2024-09-21 11:39:09,038 INFO L226 Difference]: Without dead ends: 102 [2024-09-21 11:39:09,038 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 [2024-09-21 11:39:09,039 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 [2024-09-21 11:39:09,039 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] [2024-09-21 11:39:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-21 11:39:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2024-09-21 11:39:09,069 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) [2024-09-21 11:39:09,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2024-09-21 11:39:09,071 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 55 [2024-09-21 11:39:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:39:09,071 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2024-09-21 11:39:09,071 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) [2024-09-21 11:39:09,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2024-09-21 11:39:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-21 11:39:09,073 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:39:09,073 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] [2024-09-21 11:39:09,090 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 11:39:09,277 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 [2024-09-21 11:39:09,278 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:39:09,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:09,278 INFO L85 PathProgramCache]: Analyzing trace with hash -336622505, now seen corresponding path program 1 times [2024-09-21 11:39:09,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:39:09,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711918782] [2024-09-21 11:39:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:09,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:39:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:39:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:39:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:39:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:39:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:39:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:39:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 11:39:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-21 11:39:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-21 11:39:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:39:09,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:39:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711918782] [2024-09-21 11:39:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711918782] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:39:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505272756] [2024-09-21 11:39:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:39:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:39:09,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:39:09,454 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:39:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:09,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 11:39:09,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:39:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:39:09,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:39:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:39:09,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505272756] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:39:09,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:39:09,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2024-09-21 11:39:09,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351674460] [2024-09-21 11:39:09,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:39:09,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-21 11:39:09,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:39:09,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-21 11:39:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-21 11:39:09,697 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) [2024-09-21 11:39:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:39:09,935 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2024-09-21 11:39:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 11:39:09,935 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 [2024-09-21 11:39:09,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:39:09,938 INFO L225 Difference]: With dead ends: 114 [2024-09-21 11:39:09,938 INFO L226 Difference]: Without dead ends: 95 [2024-09-21 11:39:09,939 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 [2024-09-21 11:39:09,939 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:39:09,940 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 311 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:39:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-21 11:39:09,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-09-21 11:39:09,966 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) [2024-09-21 11:39:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2024-09-21 11:39:09,970 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 57 [2024-09-21 11:39:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:39:09,970 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2024-09-21 11:39:09,970 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) [2024-09-21 11:39:09,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2024-09-21 11:39:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 11:39:09,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:39:09,976 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] [2024-09-21 11:39:09,993 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 11:39:10,179 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 [2024-09-21 11:39:10,180 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:39:10,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:10,180 INFO L85 PathProgramCache]: Analyzing trace with hash -254005355, now seen corresponding path program 2 times [2024-09-21 11:39:10,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:39:10,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866522801] [2024-09-21 11:39:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:10,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:39:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:10,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:39:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:10,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:39:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:10,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:39:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:10,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:39:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:10,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:39:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:10,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:39:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:10,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 11:39:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:10,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:39:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:10,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-21 11:39:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-21 11:39:10,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:39:10,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866522801] [2024-09-21 11:39:10,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866522801] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:39:10,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303487664] [2024-09-21 11:39:10,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:39:10,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:39:10,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:39:10,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:39:10,342 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:39:10,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:39:10,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:39:10,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:39:10,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:39:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-21 11:39:10,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:39:10,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303487664] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:39:10,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:39:10,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2024-09-21 11:39:10,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37275267] [2024-09-21 11:39:10,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:39:10,551 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 11:39:10,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:39:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 11:39:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-21 11:39:10,553 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) [2024-09-21 11:39:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:39:10,672 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2024-09-21 11:39:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 11:39:10,673 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 [2024-09-21 11:39:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:39:10,674 INFO L225 Difference]: With dead ends: 114 [2024-09-21 11:39:10,674 INFO L226 Difference]: Without dead ends: 93 [2024-09-21 11:39:10,675 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 [2024-09-21 11:39:10,676 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:39:10,676 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 258 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:39:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-21 11:39:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2024-09-21 11:39:10,690 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) [2024-09-21 11:39:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2024-09-21 11:39:10,691 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 58 [2024-09-21 11:39:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:39:10,691 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2024-09-21 11:39:10,691 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) [2024-09-21 11:39:10,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2024-09-21 11:39:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 11:39:10,693 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:39:10,693 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] [2024-09-21 11:39:10,711 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-21 11:39:10,894 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 [2024-09-21 11:39:10,894 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:39:10,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:10,894 INFO L85 PathProgramCache]: Analyzing trace with hash -764459887, now seen corresponding path program 1 times [2024-09-21 11:39:10,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:39:10,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672582041] [2024-09-21 11:39:10,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:10,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:39:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:11,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:39:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:11,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:39:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:11,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:39:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:11,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:39:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:11,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:39:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:11,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:39:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:11,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 11:39:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:11,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-21 11:39:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-21 11:39:11,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:39:11,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672582041] [2024-09-21 11:39:11,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672582041] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:39:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067524690] [2024-09-21 11:39:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:11,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:39:11,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:39:11,118 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:39:11,121 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:39:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:11,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 11:39:11,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:39:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-21 11:39:11,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:39:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-21 11:39:11,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067524690] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:39:11,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:39:11,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2024-09-21 11:39:11,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420457551] [2024-09-21 11:39:11,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:39:11,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 11:39:11,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:39:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 11:39:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-21 11:39:11,609 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) [2024-09-21 11:39:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:39:11,945 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2024-09-21 11:39:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 11:39:11,946 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 [2024-09-21 11:39:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:39:11,947 INFO L225 Difference]: With dead ends: 118 [2024-09-21 11:39:11,947 INFO L226 Difference]: Without dead ends: 95 [2024-09-21 11:39:11,948 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2024-09-21 11:39:11,948 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 [2024-09-21 11:39:11,948 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] [2024-09-21 11:39:11,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-21 11:39:11,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2024-09-21 11:39:11,973 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) [2024-09-21 11:39:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-09-21 11:39:11,975 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 58 [2024-09-21 11:39:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:39:11,975 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-09-21 11:39:11,975 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) [2024-09-21 11:39:11,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:11,979 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-09-21 11:39:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 11:39:11,980 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:39:11,980 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] [2024-09-21 11:39:11,998 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-21 11:39:12,181 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 [2024-09-21 11:39:12,181 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:39:12,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:12,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1823892196, now seen corresponding path program 1 times [2024-09-21 11:39:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:39:12,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703681509] [2024-09-21 11:39:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:12,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:39:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:12,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:39:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:12,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:39:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:12,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:39:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:12,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:39:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:12,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:39:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:12,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:39:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:12,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 11:39:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:12,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-21 11:39:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-21 11:39:12,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:39:12,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703681509] [2024-09-21 11:39:12,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703681509] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:39:12,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077197598] [2024-09-21 11:39:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:12,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:39:12,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:39:12,379 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:39:12,380 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:39:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:12,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 11:39:12,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:39:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-21 11:39:12,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:39:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-21 11:39:12,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077197598] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:39:12,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:39:12,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 12 [2024-09-21 11:39:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598988578] [2024-09-21 11:39:12,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:39:12,614 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-21 11:39:12,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:39:12,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-21 11:39:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-09-21 11:39:12,615 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) [2024-09-21 11:39:12,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:39:12,804 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2024-09-21 11:39:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 11:39:12,804 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 [2024-09-21 11:39:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:39:12,805 INFO L225 Difference]: With dead ends: 104 [2024-09-21 11:39:12,805 INFO L226 Difference]: Without dead ends: 75 [2024-09-21 11:39:12,806 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 [2024-09-21 11:39:12,806 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 [2024-09-21 11:39:12,807 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] [2024-09-21 11:39:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-21 11:39:12,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-09-21 11:39:12,816 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) [2024-09-21 11:39:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2024-09-21 11:39:12,817 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 58 [2024-09-21 11:39:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:39:12,817 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2024-09-21 11:39:12,818 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) [2024-09-21 11:39:12,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2024-09-21 11:39:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-21 11:39:12,819 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:39:12,819 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] [2024-09-21 11:39:12,837 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-21 11:39:13,019 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 [2024-09-21 11:39:13,020 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:39:13,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:39:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash 90056550, now seen corresponding path program 2 times [2024-09-21 11:39:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:39:13,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533805725] [2024-09-21 11:39:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:39:13,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:39:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:13,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:39:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:13,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:39:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:13,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:39:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:13,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:39:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:13,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:39:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:13,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:39:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:13,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 11:39:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:13,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-21 11:39:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:39:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-21 11:39:14,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:39:14,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533805725] [2024-09-21 11:39:14,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533805725] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:39:14,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684383871] [2024-09-21 11:39:14,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:39:14,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:39:14,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:39:14,200 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:39:14,202 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 11:39:14,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:39:14,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:39:14,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-21 11:39:14,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:39:14,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-21 11:39:14,854 INFO L349 Elim1Store]: treesize reduction 82, result has 28.7 percent of original size [2024-09-21 11:39:14,854 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 [2024-09-21 11:39:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-21 11:39:15,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:39:15,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:39:15,786 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 [2024-09-21 11:39:15,814 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:15,815 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:15,818 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:16,284 INFO L349 Elim1Store]: treesize reduction 384, result has 42.4 percent of original size [2024-09-21 11:39:16,285 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 [2024-09-21 11:39:16,410 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 [2024-09-21 11:39:16,519 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 [2024-09-21 11:39:18,964 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:18,971 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:18,976 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:18,986 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:19,062 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:19,064 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:19,065 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:19,069 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:19,075 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:19,077 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 11:39:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver