./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:40:45,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:40:45,430 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:40:45,433 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:40:45,434 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:40:45,454 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:40:45,454 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:40:45,454 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:40:45,455 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:40:45,458 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:40:45,458 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:40:45,458 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:40:45,458 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:40:45,458 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:40:45,459 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:40:45,459 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:40:45,459 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:40:45,459 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:40:45,460 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:40:45,460 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:40:45,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:40:45,461 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:40:45,461 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:40:45,461 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:40:45,461 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:40:45,461 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:40:45,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:40:45,461 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:40:45,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:40:45,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:40:45,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:40:45,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:40:45,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:40:45,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:40:45,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:40:45,463 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:40:45,463 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:40:45,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:40:45,463 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:40:45,463 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:40:45,463 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:40:45,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:40:45,464 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:40:45,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:40:45,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:40:45,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:40:45,672 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:40:45,672 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:40:45,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-09-21 12:40:46,836 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:40:46,987 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:40:46,988 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-09-21 12:40:46,997 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b18f9b599/fc26dcc8cfbf41e7b70f4a54f90c91fa/FLAGeca8f0258 [2024-09-21 12:40:47,010 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b18f9b599/fc26dcc8cfbf41e7b70f4a54f90c91fa [2024-09-21 12:40:47,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:40:47,014 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:40:47,017 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:40:47,017 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:40:47,021 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:40:47,021 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127db09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47, skipping insertion in model container [2024-09-21 12:40:47,022 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,038 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:40:47,158 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2024-09-21 12:40:47,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:40:47,191 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:40:47,199 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2024-09-21 12:40:47,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:40:47,226 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:40:47,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47 WrapperNode [2024-09-21 12:40:47,229 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:40:47,229 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:40:47,229 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:40:47,230 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:40:47,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,242 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,250 INFO L138 Inliner]: procedures = 16, calls = 63, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:40:47,250 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:40:47,251 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:40:47,251 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:40:47,251 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:40:47,259 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,261 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,271 INFO L175 MemorySlicer]: Split 41 memory accesses to 5 slices as follows [2, 5, 27, 4, 3]. 66 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 2, 2, 1]. [2024-09-21 12:40:47,272 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,272 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,276 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,277 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,278 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,280 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:40:47,281 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:40:47,281 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:40:47,281 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:40:47,282 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (1/1) ... [2024-09-21 12:40:47,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:40:47,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:40:47,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 12:40:47,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 12:40:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:40:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:40:47,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:40:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:40:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:40:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-21 12:40:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-21 12:40:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-21 12:40:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 12:40:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 12:40:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 12:40:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-21 12:40:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-21 12:40:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-21 12:40:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:40:47,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:40:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:40:47,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:40:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:40:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:40:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-21 12:40:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-21 12:40:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-21 12:40:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2024-09-21 12:40:47,339 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2024-09-21 12:40:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:40:47,339 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:40:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:40:47,426 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:40:47,428 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:40:47,572 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-21 12:40:47,572 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:40:47,591 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:40:47,592 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 12:40:47,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:40:47 BoogieIcfgContainer [2024-09-21 12:40:47,592 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:40:47,594 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:40:47,594 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:40:47,601 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:40:47,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:40:47" (1/3) ... [2024-09-21 12:40:47,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f867f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:40:47, skipping insertion in model container [2024-09-21 12:40:47,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:40:47" (2/3) ... [2024-09-21 12:40:47,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f867f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:40:47, skipping insertion in model container [2024-09-21 12:40:47,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:40:47" (3/3) ... [2024-09-21 12:40:47,603 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps4-ll.c [2024-09-21 12:40:47,616 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:40:47,616 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:40:47,654 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:40:47,659 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;@455ce85d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:40:47,659 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:40:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 12:40:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-21 12:40:47,667 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:40:47,668 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:40:47,668 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:40:47,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:47,672 INFO L85 PathProgramCache]: Analyzing trace with hash -185093150, now seen corresponding path program 1 times [2024-09-21 12:40:47,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:40:47,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970328802] [2024-09-21 12:40:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:47,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:40:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:40:47,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520688769] [2024-09-21 12:40:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:47,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:47,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:40:47,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:40:47,818 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:40:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:40:47,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-21 12:40:47,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:40:47,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:40:47,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:40:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:40:48,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:40:48,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:40:48,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970328802] [2024-09-21 12:40:48,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:40:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520688769] [2024-09-21 12:40:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520688769] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:40:48,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:40:48,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 12:40:48,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505108844] [2024-09-21 12:40:48,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:40:48,076 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:40:48,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:40:48,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:40:48,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:40:48,117 INFO L87 Difference]: Start difference. First operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 12:40:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:40:48,247 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2024-09-21 12:40:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:40:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-21 12:40:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:40:48,254 INFO L225 Difference]: With dead ends: 64 [2024-09-21 12:40:48,254 INFO L226 Difference]: Without dead ends: 38 [2024-09-21 12:40:48,257 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:40:48,261 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:40:48,261 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:40:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-21 12:40:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-09-21 12:40:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-21 12:40:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-09-21 12:40:48,294 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 12 [2024-09-21 12:40:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:40:48,294 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-09-21 12:40:48,294 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 12:40:48,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-09-21 12:40:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-21 12:40:48,297 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:40:48,297 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:40:48,312 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-21 12:40:48,501 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-21 12:40:48,502 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:40:48,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:48,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2020592497, now seen corresponding path program 1 times [2024-09-21 12:40:48,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:40:48,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616054780] [2024-09-21 12:40:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:48,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:40:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:40:48,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606066468] [2024-09-21 12:40:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:48,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:48,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:40:48,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:40:48,567 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:40:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:40:48,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-21 12:40:48,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:40:48,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:40:48,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:40:48,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2024-09-21 12:40:48,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:40:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:40:49,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:40:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 12:40:55,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:40:55,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616054780] [2024-09-21 12:40:55,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:40:55,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606066468] [2024-09-21 12:40:55,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606066468] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:40:55,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:40:55,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2024-09-21 12:40:55,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678875517] [2024-09-21 12:40:55,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:40:55,009 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 12:40:55,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:40:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 12:40:55,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-09-21 12:40:55,010 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 12:40:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:40:55,536 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-09-21 12:40:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-21 12:40:55,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-09-21 12:40:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:40:55,540 INFO L225 Difference]: With dead ends: 65 [2024-09-21 12:40:55,541 INFO L226 Difference]: Without dead ends: 63 [2024-09-21 12:40:55,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2024-09-21 12:40:55,542 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:40:55,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 153 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:40:55,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-21 12:40:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2024-09-21 12:40:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-21 12:40:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-09-21 12:40:55,565 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 22 [2024-09-21 12:40:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:40:55,565 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-09-21 12:40:55,565 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 12:40:55,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-09-21 12:40:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-21 12:40:55,568 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:40:55,568 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:40:55,581 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:40:55,771 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:55,772 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:40:55,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:55,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1466132055, now seen corresponding path program 1 times [2024-09-21 12:40:55,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:40:55,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731581117] [2024-09-21 12:40:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:55,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:40:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:40:55,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420655827] [2024-09-21 12:40:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:55,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:55,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:40:55,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:40:55,811 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:40:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:40:55,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-21 12:40:55,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:40:55,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:40:55,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:40:55,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:40:56,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-21 12:40:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:40:56,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:40:56,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:40:56,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731581117] [2024-09-21 12:40:56,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:40:56,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420655827] [2024-09-21 12:40:56,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420655827] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:40:56,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:40:56,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-21 12:40:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294385912] [2024-09-21 12:40:56,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:40:56,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-21 12:40:56,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:40:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-21 12:40:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:40:56,122 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 12:40:56,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:40:56,424 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-09-21 12:40:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 12:40:56,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-09-21 12:40:56,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:40:56,426 INFO L225 Difference]: With dead ends: 62 [2024-09-21 12:40:56,427 INFO L226 Difference]: Without dead ends: 60 [2024-09-21 12:40:56,427 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-09-21 12:40:56,428 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:40:56,428 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 50 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:40:56,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-21 12:40:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-21 12:40:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-21 12:40:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2024-09-21 12:40:56,448 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 22 [2024-09-21 12:40:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:40:56,449 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2024-09-21 12:40:56,449 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 12:40:56,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2024-09-21 12:40:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-21 12:40:56,451 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:40:56,451 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:40:56,468 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:40:56,654 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-21 12:40:56,655 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:40:56,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash 249164484, now seen corresponding path program 1 times [2024-09-21 12:40:56,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:40:56,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670124740] [2024-09-21 12:40:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:56,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:40:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:40:56,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636635254] [2024-09-21 12:40:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:56,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:56,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:40:56,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:40:56,704 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:40:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:40:56,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-21 12:40:56,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:40:56,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:40:56,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:40:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:40:56,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:40:57,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:40:57,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670124740] [2024-09-21 12:40:57,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:40:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636635254] [2024-09-21 12:40:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636635254] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:40:57,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:40:57,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-21 12:40:57,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092923516] [2024-09-21 12:40:57,097 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:40:57,097 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:40:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:40:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:40:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-21 12:40:57,098 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-21 12:40:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:40:57,285 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2024-09-21 12:40:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:40:57,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-09-21 12:40:57,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:40:57,286 INFO L225 Difference]: With dead ends: 67 [2024-09-21 12:40:57,286 INFO L226 Difference]: Without dead ends: 51 [2024-09-21 12:40:57,287 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:40:57,287 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:40:57,288 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:40:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-21 12:40:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-21 12:40:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.096774193548387) internal successors, (34), 33 states have internal predecessors, (34), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-21 12:40:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-09-21 12:40:57,299 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 28 [2024-09-21 12:40:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:40:57,299 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-09-21 12:40:57,299 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-21 12:40:57,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-09-21 12:40:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-21 12:40:57,300 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:40:57,300 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:40:57,315 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:40:57,504 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:57,504 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:40:57,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash 846345899, now seen corresponding path program 1 times [2024-09-21 12:40:57,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:40:57,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390235740] [2024-09-21 12:40:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:57,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:40:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:40:57,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616429163] [2024-09-21 12:40:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:57,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:40:57,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:40:57,554 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:40:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:40:57,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-21 12:40:57,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:40:57,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:40:57,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:40:57,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:40:57,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-21 12:40:58,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:40:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-21 12:40:58,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:40:58,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2024-09-21 12:40:58,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2024-09-21 12:41:11,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:41:11,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390235740] [2024-09-21 12:41:11,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:41:11,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616429163] [2024-09-21 12:41:11,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616429163] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:41:11,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:41:11,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-21 12:41:11,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583901481] [2024-09-21 12:41:11,170 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:41:11,171 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 12:41:11,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:41:11,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 12:41:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=435, Unknown=3, NotChecked=0, Total=506 [2024-09-21 12:41:11,171 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 12:41:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:41:11,634 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2024-09-21 12:41:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-21 12:41:11,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 34 [2024-09-21 12:41:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:41:11,636 INFO L225 Difference]: With dead ends: 60 [2024-09-21 12:41:11,637 INFO L226 Difference]: Without dead ends: 58 [2024-09-21 12:41:11,638 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=102, Invalid=651, Unknown=3, NotChecked=0, Total=756 [2024-09-21 12:41:11,638 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:41:11,639 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 62 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:41:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-21 12:41:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2024-09-21 12:41:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-21 12:41:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-09-21 12:41:11,656 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 34 [2024-09-21 12:41:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:41:11,656 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-09-21 12:41:11,656 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 12:41:11,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-09-21 12:41:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-21 12:41:11,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:41:11,658 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:41:11,671 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 12:41:11,862 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:11,862 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:41:11,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:11,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1394095128, now seen corresponding path program 1 times [2024-09-21 12:41:11,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:41:11,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684120248] [2024-09-21 12:41:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:41:11,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:41:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:41:11,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334604529] [2024-09-21 12:41:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:41:11,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:11,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:41:11,900 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:41:11,901 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:41:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:41:11,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-21 12:41:11,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:41:11,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:11,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:12,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:41:12,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:41:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-21 12:41:12,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:41:12,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-09-21 12:41:12,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 20 [2024-09-21 12:41:13,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:41:13,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684120248] [2024-09-21 12:41:13,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:41:13,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334604529] [2024-09-21 12:41:13,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334604529] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:41:13,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:41:13,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-21 12:41:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760812263] [2024-09-21 12:41:13,066 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:41:13,066 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-21 12:41:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:41:13,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-21 12:41:13,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:41:13,067 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 12:41:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:41:13,422 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-09-21 12:41:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 12:41:13,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2024-09-21 12:41:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:41:13,423 INFO L225 Difference]: With dead ends: 65 [2024-09-21 12:41:13,423 INFO L226 Difference]: Without dead ends: 47 [2024-09-21 12:41:13,424 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-21 12:41:13,424 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:41:13,424 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 75 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:41:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-21 12:41:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-21 12:41:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-21 12:41:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-09-21 12:41:13,434 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 40 [2024-09-21 12:41:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:41:13,434 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-09-21 12:41:13,434 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 12:41:13,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-09-21 12:41:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 12:41:13,435 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:41:13,435 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:41:13,449 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 12:41:13,636 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:13,636 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:41:13,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 711386751, now seen corresponding path program 2 times [2024-09-21 12:41:13,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:41:13,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643394409] [2024-09-21 12:41:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:41:13,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:41:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:41:13,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85712437] [2024-09-21 12:41:13,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:41:13,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:13,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:41:13,674 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:41:13,675 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:41:13,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:41:13,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:41:13,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-09-21 12:41:13,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:41:13,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:41:13,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:13,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:14,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-21 12:41:14,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-21 12:41:14,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:41:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-21 12:41:14,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:41:15,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-09-21 12:41:15,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-21 12:41:16,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:41:16,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643394409] [2024-09-21 12:41:16,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:41:16,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85712437] [2024-09-21 12:41:16,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85712437] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:41:16,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:41:16,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-21 12:41:16,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907785606] [2024-09-21 12:41:16,454 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:41:16,455 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 12:41:16,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:41:16,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 12:41:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-09-21 12:41:16,455 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-21 12:41:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:41:16,950 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2024-09-21 12:41:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 12:41:16,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 46 [2024-09-21 12:41:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:41:16,951 INFO L225 Difference]: With dead ends: 58 [2024-09-21 12:41:16,951 INFO L226 Difference]: Without dead ends: 56 [2024-09-21 12:41:16,953 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2024-09-21 12:41:16,953 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:41:16,953 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 88 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:41:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-21 12:41:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-09-21 12:41:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-21 12:41:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-09-21 12:41:16,969 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 46 [2024-09-21 12:41:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:41:16,969 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-09-21 12:41:16,969 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-21 12:41:16,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-09-21 12:41:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 12:41:16,970 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:41:16,971 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:41:16,984 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-21 12:41:17,171 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:17,171 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:41:17,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:17,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1963665965, now seen corresponding path program 3 times [2024-09-21 12:41:17,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:41:17,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986825907] [2024-09-21 12:41:17,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:41:17,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:41:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:41:17,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425194190] [2024-09-21 12:41:17,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:41:17,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:41:17,217 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:41:17,220 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:41:17,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 12:41:17,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:41:17,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-09-21 12:41:17,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:41:17,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:17,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:17,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:41:17,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-21 12:41:17,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:41:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-21 12:41:18,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:41:20,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-09-21 12:41:20,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-21 12:41:20,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:41:20,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986825907] [2024-09-21 12:41:20,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:41:20,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425194190] [2024-09-21 12:41:20,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425194190] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:41:20,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:41:20,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-21 12:41:20,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099608271] [2024-09-21 12:41:20,897 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:41:20,898 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 12:41:20,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:41:20,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 12:41:20,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:41:20,898 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-21 12:41:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:41:21,525 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-21 12:41:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 12:41:21,525 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2024-09-21 12:41:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:41:21,526 INFO L225 Difference]: With dead ends: 66 [2024-09-21 12:41:21,526 INFO L226 Difference]: Without dead ends: 64 [2024-09-21 12:41:21,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 12:41:21,527 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:41:21,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:41:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-21 12:41:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2024-09-21 12:41:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-21 12:41:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2024-09-21 12:41:21,542 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 58 [2024-09-21 12:41:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:41:21,542 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2024-09-21 12:41:21,542 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-21 12:41:21,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2024-09-21 12:41:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-21 12:41:21,543 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:41:21,543 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:41:21,559 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 12:41:21,743 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:21,744 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:41:21,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash 647455911, now seen corresponding path program 4 times [2024-09-21 12:41:21,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:41:21,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446554950] [2024-09-21 12:41:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:41:21,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:41:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:41:21,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607242371] [2024-09-21 12:41:21,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:41:21,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:21,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:41:21,783 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:41:21,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 12:41:22,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:41:22,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:41:22,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 185 conjuncts are in the unsatisfiable core [2024-09-21 12:41:22,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:41:22,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:41:22,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:22,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:22,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-21 12:41:22,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:41:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-09-21 12:41:22,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:41:25,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-09-21 12:41:25,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-09-21 12:41:26,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:41:26,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446554950] [2024-09-21 12:41:26,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:41:26,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607242371] [2024-09-21 12:41:26,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607242371] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:41:26,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:41:26,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-21 12:41:26,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991436523] [2024-09-21 12:41:26,397 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:41:26,397 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 12:41:26,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:41:26,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 12:41:26,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2024-09-21 12:41:26,398 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 19 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-21 12:41:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:41:27,078 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-09-21 12:41:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 12:41:27,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 70 [2024-09-21 12:41:27,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:41:27,079 INFO L225 Difference]: With dead ends: 68 [2024-09-21 12:41:27,079 INFO L226 Difference]: Without dead ends: 66 [2024-09-21 12:41:27,079 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2024-09-21 12:41:27,080 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:41:27,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 124 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 12:41:27,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-21 12:41:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2024-09-21 12:41:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (21), 12 states have call predecessors, (21), 9 states have call successors, (21) [2024-09-21 12:41:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-09-21 12:41:27,092 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 70 [2024-09-21 12:41:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:41:27,092 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-09-21 12:41:27,093 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-21 12:41:27,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-09-21 12:41:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-21 12:41:27,094 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:41:27,094 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:41:27,108 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 12:41:27,294 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-09-21 12:41:27,294 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:41:27,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1254705940, now seen corresponding path program 2 times [2024-09-21 12:41:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:41:27,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360509264] [2024-09-21 12:41:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:41:27,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:41:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:41:27,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45732455] [2024-09-21 12:41:27,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:41:27,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:27,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:41:27,329 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:41:27,330 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 12:41:27,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:41:27,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:41:27,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-09-21 12:41:27,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:41:27,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:27,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:27,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:27,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:41:27,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:41:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-21 12:41:27,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:41:28,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 24 [2024-09-21 12:41:28,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-09-21 12:41:50,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:41:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360509264] [2024-09-21 12:41:50,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:41:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45732455] [2024-09-21 12:41:50,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45732455] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:41:50,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:41:50,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-21 12:41:50,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053248988] [2024-09-21 12:41:50,727 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:41:50,727 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 12:41:50,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:41:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 12:41:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=519, Unknown=1, NotChecked=0, Total=600 [2024-09-21 12:41:50,728 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 9 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:41:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:41:51,410 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-09-21 12:41:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:41:51,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 9 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 52 [2024-09-21 12:41:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:41:51,411 INFO L225 Difference]: With dead ends: 73 [2024-09-21 12:41:51,411 INFO L226 Difference]: Without dead ends: 59 [2024-09-21 12:41:51,412 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=135, Invalid=794, Unknown=1, NotChecked=0, Total=930 [2024-09-21 12:41:51,412 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 17 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:41:51,412 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 374 Invalid, 2 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 12:41:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-21 12:41:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-21 12:41:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (19), 12 states have call predecessors, (19), 9 states have call successors, (19) [2024-09-21 12:41:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-21 12:41:51,427 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 52 [2024-09-21 12:41:51,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:41:51,427 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-21 12:41:51,427 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 9 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:41:51,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:51,427 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-21 12:41:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-21 12:41:51,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:41:51,428 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:41:51,446 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-21 12:41:51,629 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-21 12:41:51,629 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:41:51,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1802374405, now seen corresponding path program 5 times [2024-09-21 12:41:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:41:51,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002875056] [2024-09-21 12:41:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:41:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:41:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:41:51,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101328033] [2024-09-21 12:41:51,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 12:41:51,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:51,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:41:51,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:41:51,691 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 12:41:52,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-21 12:41:52,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:41:52,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 227 conjuncts are in the unsatisfiable core [2024-09-21 12:41:52,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:41:52,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:41:52,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:52,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:52,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-21 12:41:53,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:41:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 17 proven. 86 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-21 12:41:53,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:41:56,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-09-21 12:41:56,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-21 12:41:58,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:41:58,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002875056] [2024-09-21 12:41:58,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:41:58,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101328033] [2024-09-21 12:41:58,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101328033] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:41:58,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:41:58,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-21 12:41:58,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795801232] [2024-09-21 12:41:58,134 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:41:58,134 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-21 12:41:58,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:41:58,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-21 12:41:58,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2024-09-21 12:41:58,135 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-21 12:41:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:41:59,051 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2024-09-21 12:41:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-21 12:41:59,051 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 82 [2024-09-21 12:41:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:41:59,053 INFO L225 Difference]: With dead ends: 70 [2024-09-21 12:41:59,053 INFO L226 Difference]: Without dead ends: 68 [2024-09-21 12:41:59,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2024-09-21 12:41:59,054 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-21 12:41:59,054 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 165 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-21 12:41:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-21 12:41:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2024-09-21 12:41:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 12 states have return successors, (22), 13 states have call predecessors, (22), 9 states have call successors, (22) [2024-09-21 12:41:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2024-09-21 12:41:59,065 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 82 [2024-09-21 12:41:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:41:59,065 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2024-09-21 12:41:59,065 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-21 12:41:59,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:59,066 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2024-09-21 12:41:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-21 12:41:59,066 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:41:59,066 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:41:59,082 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-21 12:41:59,267 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:59,267 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:41:59,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:59,267 INFO L85 PathProgramCache]: Analyzing trace with hash 81843520, now seen corresponding path program 3 times [2024-09-21 12:41:59,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:41:59,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891360655] [2024-09-21 12:41:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:41:59,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:41:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:41:59,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738733779] [2024-09-21 12:41:59,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:41:59,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:59,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:41:59,298 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:41:59,299 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 12:41:59,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 12:41:59,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:41:59,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-09-21 12:41:59,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:41:59,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:59,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:00,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2024-09-21 12:42:00,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:42:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 12:42:00,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:42:06,440 WARN L293 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 112 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-21 12:42:12,808 WARN L293 SmtUtils]: Spent 5.10s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-21 12:42:51,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:51,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891360655] [2024-09-21 12:42:51,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:42:51,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738733779] [2024-09-21 12:42:51,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738733779] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:42:51,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:42:51,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-21 12:42:51,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138315081] [2024-09-21 12:42:51,686 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:42:51,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 12:42:51,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:51,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 12:42:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=526, Unknown=5, NotChecked=0, Total=600 [2024-09-21 12:42:51,687 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 17 states have internal predecessors, (31), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-21 12:42:56,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-21 12:42:57,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:42:57,270 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-09-21 12:42:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-21 12:42:57,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 17 states have internal predecessors, (31), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 64 [2024-09-21 12:42:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:42:57,271 INFO L225 Difference]: With dead ends: 75 [2024-09-21 12:42:57,271 INFO L226 Difference]: Without dead ends: 61 [2024-09-21 12:42:57,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=139, Invalid=1046, Unknown=5, NotChecked=0, Total=1190 [2024-09-21 12:42:57,272 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-21 12:42:57,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 126 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 405 Invalid, 3 Unknown, 0 Unchecked, 4.9s Time] [2024-09-21 12:42:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-21 12:42:57,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-09-21 12:42:57,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 12 states have return successors, (20), 13 states have call predecessors, (20), 9 states have call successors, (20) [2024-09-21 12:42:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-09-21 12:42:57,285 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 64 [2024-09-21 12:42:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:42:57,285 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-09-21 12:42:57,285 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 17 states have internal predecessors, (31), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-21 12:42:57,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-09-21 12:42:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-21 12:42:57,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:42:57,286 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:42:57,299 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-21 12:42:57,486 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-21 12:42:57,486 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:42:57,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash -286269233, now seen corresponding path program 6 times [2024-09-21 12:42:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:42:57,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243271394] [2024-09-21 12:42:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:42:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:42:57,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061743130] [2024-09-21 12:42:57,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 12:42:57,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:57,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:42:57,548 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:42:57,549 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 12:42:58,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-21 12:42:58,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:42:58,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 283 conjuncts are in the unsatisfiable core [2024-09-21 12:42:58,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:42:58,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:58,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:58,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:42:58,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:59,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-21 12:42:59,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:42:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 117 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-21 12:42:59,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:43:03,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-09-21 12:43:03,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-09-21 12:43:05,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:43:05,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243271394] [2024-09-21 12:43:05,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:43:05,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061743130] [2024-09-21 12:43:05,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061743130] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:43:05,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:43:05,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-21 12:43:05,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547137807] [2024-09-21 12:43:05,926 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:43:05,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-21 12:43:05,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:43:05,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-21 12:43:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2024-09-21 12:43:05,927 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 26 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-21 12:43:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:43:07,017 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2024-09-21 12:43:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-21 12:43:07,018 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) Word has length 94 [2024-09-21 12:43:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:43:07,018 INFO L225 Difference]: With dead ends: 72 [2024-09-21 12:43:07,019 INFO L226 Difference]: Without dead ends: 70 [2024-09-21 12:43:07,019 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=155, Invalid=1567, Unknown=0, NotChecked=0, Total=1722 [2024-09-21 12:43:07,019 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-21 12:43:07,019 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 175 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-21 12:43:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-21 12:43:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2024-09-21 12:43:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (23), 14 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-21 12:43:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2024-09-21 12:43:07,031 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 94 [2024-09-21 12:43:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:43:07,032 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2024-09-21 12:43:07,032 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-21 12:43:07,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:43:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2024-09-21 12:43:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-21 12:43:07,032 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:43:07,032 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:43:07,048 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-21 12:43:07,233 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:43:07,233 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:43:07,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:43:07,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1653208340, now seen corresponding path program 4 times [2024-09-21 12:43:07,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:43:07,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373026530] [2024-09-21 12:43:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:43:07,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:43:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:43:07,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012120520] [2024-09-21 12:43:07,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:43:07,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:43:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:43:07,269 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:43:07,272 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-21 12:43:07,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:43:07,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:43:07,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-09-21 12:43:07,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:43:07,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-21 12:43:08,005 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 93 treesize of output 80 [2024-09-21 12:43:08,319 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 103 treesize of output 90 [2024-09-21 12:43:08,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-21 12:43:09,008 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 67 treesize of output 59 [2024-09-21 12:43:09,011 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 119 treesize of output 47 [2024-09-21 12:43:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 79 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-21 12:43:09,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:43:12,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:43:12,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 498 treesize of output 497 [2024-09-21 12:43:20,178 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse2 (select .cse1 c_func_to_recursive_line_26_to_34_0_~y.offset))) (or (and (= (let ((.cse0 (select (select (store |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse1 c_func_to_recursive_line_26_to_34_0_~y.offset (+ 3 .cse2))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* (* .cse0 .cse0 .cse0) 2) (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0))) (+ (* 14 (* .cse2 .cse2 .cse2)) 144 (* .cse2 .cse2 .cse2 .cse2) (* .cse2 168) (* (* .cse2 .cse2) 73))) (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base) (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (not (= (mod (+ (* 3 .cse2 .cse2) (* 3 .cse2 .cse2 .cse2 .cse2) (* 2 .cse2 .cse2 .cse2)) 4) 0))))) is different from false [2024-09-21 12:43:32,224 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-21 12:43:36,239 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse0 (select .cse2 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (and (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (or (not (= (+ (* .cse0 .cse0 .cse0 .cse0) (* 14 (* .cse0 .cse0 .cse0)) (* .cse0 168) 144 (* 73 (* .cse0 .cse0))) (let ((.cse1 (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse2 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ 3 .cse0))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* 2 (* .cse1 .cse1 .cse1)) (* .cse1 .cse1 .cse1 .cse1) (* .cse1 .cse1))))) (= (let ((.cse3 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse3 .cse3) (* 2 (* .cse3 .cse3 .cse3)) (* .cse3 .cse3 .cse3 .cse3))) (* 4 (select (select |c_#memory_int#1| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|))))) (or (= (mod (+ (* 3 .cse0 .cse0 .cse0 .cse0) (* 2 .cse0 .cse0 .cse0) (* 3 .cse0 .cse0)) 4) 0) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_27| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_29| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (= (let ((.cse4 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse4 .cse4) (* 2 (* .cse4 .cse4 .cse4)) (* .cse4 .cse4 .cse4 .cse4))) (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_27|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_29|) 4))))))) is different from true [2024-09-21 12:43:48,261 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)