./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_prodbin-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 de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_prodbin-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 5ace794fa35bd3dd49302fe61957917bbb7565f1b1f34293812fc47531868d51 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:52:04,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:52:04,813 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:52:04,818 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:52:04,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:52:04,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:52:04,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:52:04,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:52:04,849 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:52:04,850 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:52:04,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:52:04,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:52:04,851 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:52:04,852 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:52:04,852 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:52:04,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:52:04,854 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:52:04,854 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:52:04,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:52:04,855 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:52:04,855 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:52:04,855 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:52:04,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:52:04,856 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:52:04,856 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:52:04,857 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:52:04,857 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:52:04,857 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:52:04,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:52:04,858 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:52:04,858 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:52:04,858 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:52:04,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:52:04,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:52:04,859 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:52:04,859 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:52:04,859 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:52:04,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:52:04,860 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:52:04,860 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:52:04,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:52:04,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:52:04,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ace794fa35bd3dd49302fe61957917bbb7565f1b1f34293812fc47531868d51 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:52:05,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:52:05,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:52:05,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:52:05,131 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:52:05,132 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:52:05,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_prodbin-ll.c [2024-09-18 16:52:06,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:52:06,743 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:52:06,744 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prodbin-ll.c [2024-09-18 16:52:06,751 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/dd68d0258/fe6d5b5ec93241638ac4517b666def27/FLAG6beb77978 [2024-09-18 16:52:06,767 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/dd68d0258/fe6d5b5ec93241638ac4517b666def27 [2024-09-18 16:52:06,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:52:06,773 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:52:06,776 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:52:06,776 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:52:06,781 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:52:06,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:52:06" (1/1) ... [2024-09-18 16:52:06,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f7a1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:06, skipping insertion in model container [2024-09-18 16:52:06,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:52:06" (1/1) ... [2024-09-18 16:52:06,803 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:52:06,953 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_prodbin-ll.c[1073,1086] [2024-09-18 16:52:06,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:52:06,985 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:52:06,994 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_prodbin-ll.c[1073,1086] [2024-09-18 16:52:07,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:52:07,015 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:52:07,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07 WrapperNode [2024-09-18 16:52:07,016 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:52:07,017 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:52:07,017 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:52:07,017 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:52:07,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,027 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,032 INFO L138 Inliner]: procedures = 16, calls = 54, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:52:07,032 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:52:07,033 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:52:07,033 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:52:07,033 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:52:07,041 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,044 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,060 INFO L175 MemorySlicer]: Split 29 memory accesses to 6 slices as follows [2, 8, 5, 5, 4, 5]. 28 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 3, 2, 2, 1, 1]. [2024-09-18 16:52:07,060 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,067 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,068 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,070 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,071 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:52:07,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:52:07,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:52:07,074 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:52:07,075 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (1/1) ... [2024-09-18 16:52:07,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:52:07,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:52:07,104 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) [2024-09-18 16:52:07,111 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 [2024-09-18 16:52:07,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:52:07,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:52:07,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:52:07,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:52:07,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 16:52:07,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-18 16:52:07,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-18 16:52:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-18 16:52:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-18 16:52:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-18 16:52:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-18 16:52:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-18 16:52:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-18 16:52:07,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-18 16:52:07,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-18 16:52:07,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-18 16:52:07,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:52:07,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:52:07,146 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_40_0 [2024-09-18 16:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_40_0 [2024-09-18 16:52:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:52:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-18 16:52:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-18 16:52:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-18 16:52:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-18 16:52:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-18 16:52:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-18 16:52:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:52:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-18 16:52:07,235 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:52:07,237 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:52:07,418 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-18 16:52:07,419 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:52:07,442 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:52:07,443 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 16:52:07,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:52:07 BoogieIcfgContainer [2024-09-18 16:52:07,443 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:52:07,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:52:07,447 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:52:07,450 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:52:07,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:52:06" (1/3) ... [2024-09-18 16:52:07,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34adb1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:52:07, skipping insertion in model container [2024-09-18 16:52:07,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:52:07" (2/3) ... [2024-09-18 16:52:07,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34adb1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:52:07, skipping insertion in model container [2024-09-18 16:52:07,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:52:07" (3/3) ... [2024-09-18 16:52:07,454 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_prodbin-ll.c [2024-09-18 16:52:07,470 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:52:07,471 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:52:07,517 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:52:07,522 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;@6f2c6ced, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:52:07,522 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:52:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 16:52:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-18 16:52:07,531 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:52:07,532 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:52:07,532 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:52:07,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash 574913788, now seen corresponding path program 1 times [2024-09-18 16:52:07,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:52:07,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310528541] [2024-09-18 16:52:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:52:07,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:52:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:07,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:52:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:07,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:52:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:52:07,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:52:07,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310528541] [2024-09-18 16:52:07,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310528541] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:52:07,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:52:07,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 16:52:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189596433] [2024-09-18 16:52:07,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:52:07,795 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 16:52:07,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:52:07,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 16:52:07,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:52:07,822 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:52:07,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:52:07,858 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-09-18 16:52:07,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 16:52:07,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-18 16:52:07,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:52:07,866 INFO L225 Difference]: With dead ends: 60 [2024-09-18 16:52:07,866 INFO L226 Difference]: Without dead ends: 30 [2024-09-18 16:52:07,868 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:52:07,872 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:52:07,872 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:52:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-18 16:52:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-18 16:52:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 16:52:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-18 16:52:07,904 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2024-09-18 16:52:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:52:07,904 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-18 16:52:07,905 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:52:07,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-18 16:52:07,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-18 16:52:07,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:52:07,907 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:52:07,908 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:52:07,908 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:52:07,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:07,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1275978366, now seen corresponding path program 1 times [2024-09-18 16:52:07,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:52:07,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890564900] [2024-09-18 16:52:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:52:07,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:52:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:52:08,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123814062] [2024-09-18 16:52:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:52:08,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:52:08,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:52:08,009 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) [2024-09-18 16:52:08,010 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:52:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:08,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-18 16:52:08,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:52:08,230 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 [2024-09-18 16:52:08,234 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 [2024-09-18 16:52:08,247 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 [2024-09-18 16:52:08,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:52:08,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:52:08,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 16:52:08,417 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 [2024-09-18 16:52:08,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 16:52:08,437 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 [2024-09-18 16:52:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:52:08,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:52:08,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:52:08,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890564900] [2024-09-18 16:52:08,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:52:08,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123814062] [2024-09-18 16:52:08,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123814062] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:52:08,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:52:08,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-18 16:52:08,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615866415] [2024-09-18 16:52:08,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:52:08,504 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:52:08,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:52:08,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:52:08,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:52:08,507 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:52:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:52:08,726 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2024-09-18 16:52:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:52:08,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-18 16:52:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:52:08,728 INFO L225 Difference]: With dead ends: 46 [2024-09-18 16:52:08,728 INFO L226 Difference]: Without dead ends: 44 [2024-09-18 16:52:08,729 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:52:08,730 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:52:08,732 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 139 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:52:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-18 16:52:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2024-09-18 16:52:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-18 16:52:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-09-18 16:52:08,750 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 18 [2024-09-18 16:52:08,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:52:08,750 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-09-18 16:52:08,751 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:52:08,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-09-18 16:52:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-18 16:52:08,753 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:52:08,753 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:52:08,771 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 16:52:08,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:52:08,954 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:52:08,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:08,955 INFO L85 PathProgramCache]: Analyzing trace with hash 936628089, now seen corresponding path program 1 times [2024-09-18 16:52:08,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:52:08,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032080337] [2024-09-18 16:52:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:52:08,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:52:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:09,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:52:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:09,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:52:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:09,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:52:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:09,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:52:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:52:09,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:52:09,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032080337] [2024-09-18 16:52:09,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032080337] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:52:09,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:52:09,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-18 16:52:09,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86372294] [2024-09-18 16:52:09,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:52:09,635 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 16:52:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:52:09,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 16:52:09,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:52:09,636 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 16:52:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:52:09,927 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2024-09-18 16:52:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 16:52:09,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2024-09-18 16:52:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:52:09,930 INFO L225 Difference]: With dead ends: 52 [2024-09-18 16:52:09,930 INFO L226 Difference]: Without dead ends: 42 [2024-09-18 16:52:09,931 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-09-18 16:52:09,933 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:52:09,933 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 69 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:52:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-18 16:52:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-09-18 16:52:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-18 16:52:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-09-18 16:52:09,949 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 28 [2024-09-18 16:52:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:52:09,950 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-09-18 16:52:09,950 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 16:52:09,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-09-18 16:52:09,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 16:52:09,952 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:52:09,952 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:52:09,952 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 16:52:09,952 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:52:09,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:09,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1861020597, now seen corresponding path program 1 times [2024-09-18 16:52:09,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:52:09,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801444118] [2024-09-18 16:52:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:52:09,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:52:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:52:10,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762882445] [2024-09-18 16:52:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:52:10,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:52:10,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:52:10,019 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) [2024-09-18 16:52:10,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:52:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:10,180 WARN L260 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-09-18 16:52:10,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:52:10,206 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 [2024-09-18 16:52:10,212 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 [2024-09-18 16:52:10,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:52:10,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:52:10,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:52:10,888 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 45 treesize of output 25 [2024-09-18 16:52:10,906 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 23 treesize of output 15 [2024-09-18 16:52:11,016 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 40 treesize of output 24 [2024-09-18 16:52:11,036 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 97 treesize of output 71 [2024-09-18 16:52:11,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 69 [2024-09-18 16:52:11,283 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 23 treesize of output 15 [2024-09-18 16:52:11,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2024-09-18 16:52:11,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-09-18 16:52:11,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:52:11,315 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 33 treesize of output 29 [2024-09-18 16:52:11,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-18 16:52:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:52:11,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:52:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:52:22,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:52:22,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801444118] [2024-09-18 16:52:22,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:52:22,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762882445] [2024-09-18 16:52:22,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762882445] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:52:22,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:52:22,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 28 [2024-09-18 16:52:22,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855281259] [2024-09-18 16:52:22,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:52:22,280 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-18 16:52:22,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:52:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-18 16:52:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2024-09-18 16:52:22,281 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 28 states, 23 states have (on average 1.565217391304348) internal successors, (36), 21 states have internal predecessors, (36), 10 states have call successors, (12), 8 states have call predecessors, (12), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 16:52:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:52:29,629 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2024-09-18 16:52:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-18 16:52:29,630 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.565217391304348) internal successors, (36), 21 states have internal predecessors, (36), 10 states have call successors, (12), 8 states have call predecessors, (12), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 30 [2024-09-18 16:52:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:52:29,631 INFO L225 Difference]: With dead ends: 75 [2024-09-18 16:52:29,631 INFO L226 Difference]: Without dead ends: 73 [2024-09-18 16:52:29,632 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=320, Invalid=1842, Unknown=0, NotChecked=0, Total=2162 [2024-09-18 16:52:29,633 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 89 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:52:29,634 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 227 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-18 16:52:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-18 16:52:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2024-09-18 16:52:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-18 16:52:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2024-09-18 16:52:29,663 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 30 [2024-09-18 16:52:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:52:29,663 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2024-09-18 16:52:29,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.565217391304348) internal successors, (36), 21 states have internal predecessors, (36), 10 states have call successors, (12), 8 states have call predecessors, (12), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 16:52:29,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2024-09-18 16:52:29,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 16:52:29,665 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:52:29,665 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:52:29,684 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 16:52:29,866 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:52:29,866 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:52:29,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1303652198, now seen corresponding path program 1 times [2024-09-18 16:52:29,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:52:29,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656899277] [2024-09-18 16:52:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:52:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:52:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:52:29,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072983021] [2024-09-18 16:52:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:52:29,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:52:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:52:29,925 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) [2024-09-18 16:52:29,926 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:52:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:52:30,083 WARN L260 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 203 conjuncts are in the unsatisfiable core [2024-09-18 16:52:30,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:52:30,096 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 [2024-09-18 16:52:30,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-18 16:52:30,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:52:30,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:52:30,133 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 [2024-09-18 16:52:30,387 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 23 treesize of output 15 [2024-09-18 16:52:30,396 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 45 treesize of output 25 [2024-09-18 16:52:30,463 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 40 treesize of output 24 [2024-09-18 16:52:30,474 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 108 treesize of output 80 [2024-09-18 16:52:30,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2024-09-18 16:52:30,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 13 [2024-09-18 16:52:30,957 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 31 treesize of output 19 [2024-09-18 16:52:30,969 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 117 treesize of output 87 [2024-09-18 16:52:30,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 81 [2024-09-18 16:52:31,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-09-18 16:52:31,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-18 16:52:31,173 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 [2024-09-18 16:52:31,177 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 65 treesize of output 41 [2024-09-18 16:52:31,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 16:52:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:52:31,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:52:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:52:47,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:52:47,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656899277] [2024-09-18 16:52:47,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:52:47,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072983021] [2024-09-18 16:52:47,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072983021] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:52:47,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:52:47,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 38 [2024-09-18 16:52:47,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127647167] [2024-09-18 16:52:47,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:52:47,138 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-18 16:52:47,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:52:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-18 16:52:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2024-09-18 16:52:47,139 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 38 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 30 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-18 16:52:49,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-18 16:53:27,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-18 16:53:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:53:48,876 INFO L93 Difference]: Finished difference Result 170 states and 208 transitions. [2024-09-18 16:53:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-18 16:53:48,876 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 30 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2024-09-18 16:53:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:53:48,878 INFO L225 Difference]: With dead ends: 170 [2024-09-18 16:53:48,878 INFO L226 Difference]: Without dead ends: 166 [2024-09-18 16:53:48,880 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 60.3s TimeCoverageRelationStatistics Valid=743, Invalid=4957, Unknown=0, NotChecked=0, Total=5700 [2024-09-18 16:53:48,881 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 131 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:53:48,881 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 372 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2024-09-18 16:53:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-18 16:53:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2024-09-18 16:53:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 114 states have internal predecessors, (126), 25 states have call successors, (25), 20 states have call predecessors, (25), 26 states have return successors, (46), 23 states have call predecessors, (46), 22 states have call successors, (46) [2024-09-18 16:53:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 197 transitions. [2024-09-18 16:53:48,950 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 197 transitions. Word has length 42 [2024-09-18 16:53:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:53:48,951 INFO L474 AbstractCegarLoop]: Abstraction has 158 states and 197 transitions. [2024-09-18 16:53:48,951 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 30 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-18 16:53:48,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:53:48,951 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 197 transitions. [2024-09-18 16:53:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 16:53:48,953 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:53:48,953 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:53:48,967 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:53:49,154 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:53:49,154 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:53:49,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:53:49,155 INFO L85 PathProgramCache]: Analyzing trace with hash 549162052, now seen corresponding path program 1 times [2024-09-18 16:53:49,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:53:49,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700446574] [2024-09-18 16:53:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:53:49,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:53:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:53:49,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684643063] [2024-09-18 16:53:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:53:49,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:53:49,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:53:49,203 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) [2024-09-18 16:53:49,203 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:53:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:53:49,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-09-18 16:53:49,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:53:49,317 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 [2024-09-18 16:53:49,336 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 [2024-09-18 16:53:49,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:53:49,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:53:49,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:53:49,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:53:49,887 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 27 treesize of output 19 [2024-09-18 16:53:49,890 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 23 treesize of output 15 [2024-09-18 16:53:49,900 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 47 treesize of output 31 [2024-09-18 16:53:49,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 31 treesize of output 24 [2024-09-18 16:53:49,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 16:53:49,942 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 [2024-09-18 16:53:49,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:53:49,950 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 35 treesize of output 31 [2024-09-18 16:53:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:53:50,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:53:54,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:53:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700446574] [2024-09-18 16:53:54,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:53:54,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684643063] [2024-09-18 16:53:54,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684643063] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:53:54,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:53:54,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-18 16:53:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792942612] [2024-09-18 16:53:54,667 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:53:54,668 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-18 16:53:54,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:53:54,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-18 16:53:54,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=616, Unknown=1, NotChecked=0, Total=702 [2024-09-18 16:53:54,669 INFO L87 Difference]: Start difference. First operand 158 states and 197 transitions. Second operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 16:53:58,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:53:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:53:59,400 INFO L93 Difference]: Finished difference Result 168 states and 213 transitions. [2024-09-18 16:53:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 16:53:59,400 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2024-09-18 16:53:59,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:53:59,403 INFO L225 Difference]: With dead ends: 168 [2024-09-18 16:53:59,403 INFO L226 Difference]: Without dead ends: 158 [2024-09-18 16:53:59,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=133, Invalid=988, Unknown=1, NotChecked=0, Total=1122 [2024-09-18 16:53:59,404 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-18 16:53:59,405 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 112 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 517 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-09-18 16:53:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-09-18 16:53:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2024-09-18 16:53:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 114 states have internal predecessors, (123), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (52), 22 states have call predecessors, (52), 24 states have call successors, (52) [2024-09-18 16:53:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2024-09-18 16:53:59,509 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 42 [2024-09-18 16:53:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:53:59,509 INFO L474 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2024-09-18 16:53:59,509 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 16:53:59,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:53:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2024-09-18 16:53:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 16:53:59,512 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:53:59,513 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:53:59,531 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 16:53:59,713 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:53:59,714 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:53:59,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:53:59,714 INFO L85 PathProgramCache]: Analyzing trace with hash 971863878, now seen corresponding path program 1 times [2024-09-18 16:53:59,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:53:59,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536754143] [2024-09-18 16:53:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:53:59,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:53:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:54:00,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:54:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:54:00,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:54:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:54:00,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:54:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:54:00,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:54:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:54:00,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:54:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:54:00,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:54:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:54:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-18 16:54:00,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:54:00,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536754143] [2024-09-18 16:54:00,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536754143] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:54:00,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346876135] [2024-09-18 16:54:00,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:54:00,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:54:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:54:00,738 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) [2024-09-18 16:54:00,740 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:54:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:54:00,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-18 16:54:00,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:54:00,883 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 [2024-09-18 16:54:00,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 16:54:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-18 16:54:01,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:54:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:54:02,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346876135] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:54:02,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:54:02,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 18] total 39 [2024-09-18 16:54:02,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617123590] [2024-09-18 16:54:02,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:54:02,036 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-18 16:54:02,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:54:02,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-18 16:54:02,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 16:54:02,038 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 39 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 33 states have internal predecessors, (49), 13 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (13), 10 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-18 16:54:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:54:02,828 INFO L93 Difference]: Finished difference Result 178 states and 269 transitions. [2024-09-18 16:54:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:54:02,829 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 33 states have internal predecessors, (49), 13 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (13), 10 states have call predecessors, (13), 12 states have call successors, (13) Word has length 42 [2024-09-18 16:54:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:54:02,831 INFO L225 Difference]: With dead ends: 178 [2024-09-18 16:54:02,831 INFO L226 Difference]: Without dead ends: 150 [2024-09-18 16:54:02,832 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=2378, Unknown=0, NotChecked=0, Total=2756 [2024-09-18 16:54:02,833 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:54:02,833 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 71 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 16:54:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-18 16:54:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2024-09-18 16:54:02,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 98 states have (on average 1.163265306122449) internal successors, (114), 105 states have internal predecessors, (114), 26 states have call successors, (26), 19 states have call predecessors, (26), 19 states have return successors, (40), 19 states have call predecessors, (40), 24 states have call successors, (40) [2024-09-18 16:54:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 180 transitions. [2024-09-18 16:54:02,928 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 180 transitions. Word has length 42 [2024-09-18 16:54:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:54:02,929 INFO L474 AbstractCegarLoop]: Abstraction has 144 states and 180 transitions. [2024-09-18 16:54:02,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 33 states have internal predecessors, (49), 13 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (13), 10 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-18 16:54:02,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:54:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 180 transitions. [2024-09-18 16:54:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-18 16:54:02,934 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:54:02,934 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:54:02,953 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 16:54:03,135 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-18 16:54:03,135 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:54:03,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:54:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash 953923471, now seen corresponding path program 2 times [2024-09-18 16:54:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:54:03,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182512413] [2024-09-18 16:54:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:54:03,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:54:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:54:03,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974826208] [2024-09-18 16:54:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:54:03,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:54:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:54:03,173 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) [2024-09-18 16:54:03,178 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 16:54:03,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:54:03,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:54:03,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-09-18 16:54:03,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:54:03,359 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 [2024-09-18 16:54:03,380 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 [2024-09-18 16:54:03,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:54:03,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:54:03,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:54:03,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:54:04,512 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 29 treesize of output 21 [2024-09-18 16:54:04,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-18 16:54:04,522 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 64 treesize of output 46 [2024-09-18 16:54:04,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2024-09-18 16:54:04,619 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 21 treesize of output 13 [2024-09-18 16:54:04,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-18 16:54:04,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:54:04,637 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 52 treesize of output 44 [2024-09-18 16:54:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 16:54:04,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:54:11,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:54:11,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182512413] [2024-09-18 16:54:11,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:54:11,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974826208] [2024-09-18 16:54:11,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974826208] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:54:11,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:54:11,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-18 16:54:11,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454278823] [2024-09-18 16:54:11,964 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:54:11,965 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-18 16:54:11,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:54:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-18 16:54:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1004, Unknown=1, NotChecked=0, Total=1122 [2024-09-18 16:54:11,966 INFO L87 Difference]: Start difference. First operand 144 states and 180 transitions. Second operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 16:54:16,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:54:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:54:17,211 INFO L93 Difference]: Finished difference Result 154 states and 200 transitions. [2024-09-18 16:54:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:54:17,212 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 56 [2024-09-18 16:54:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:54:17,213 INFO L225 Difference]: With dead ends: 154 [2024-09-18 16:54:17,213 INFO L226 Difference]: Without dead ends: 142 [2024-09-18 16:54:17,214 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=161, Invalid=1398, Unknown=1, NotChecked=0, Total=1560 [2024-09-18 16:54:17,215 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-18 16:54:17,215 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 153 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 690 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-09-18 16:54:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-18 16:54:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2024-09-18 16:54:17,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 103 states have internal predecessors, (112), 26 states have call successors, (26), 19 states have call predecessors, (26), 18 states have return successors, (49), 19 states have call predecessors, (49), 24 states have call successors, (49) [2024-09-18 16:54:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2024-09-18 16:54:17,298 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 56 [2024-09-18 16:54:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:54:17,298 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2024-09-18 16:54:17,298 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 16:54:17,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:54:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2024-09-18 16:54:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 16:54:17,300 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:54:17,300 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:54:17,315 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-18 16:54:17,500 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:54:17,501 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:54:17,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:54:17,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2107326361, now seen corresponding path program 2 times [2024-09-18 16:54:17,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:54:17,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320873660] [2024-09-18 16:54:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:54:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:54:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:54:17,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410151671] [2024-09-18 16:54:17,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:54:17,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:54:17,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:54:17,552 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) [2024-09-18 16:54:17,553 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 16:54:17,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:54:17,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:54:17,793 WARN L260 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 265 conjuncts are in the unsatisfiable core [2024-09-18 16:54:17,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:54:17,803 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 [2024-09-18 16:54:17,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-18 16:54:17,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:54:17,810 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 [2024-09-18 16:54:17,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-18 16:54:17,947 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 23 treesize of output 15 [2024-09-18 16:54:17,951 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 53 treesize of output 29 [2024-09-18 16:54:17,992 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 142 treesize of output 108 [2024-09-18 16:54:17,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 98 [2024-09-18 16:54:18,012 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 40 treesize of output 24 [2024-09-18 16:54:18,432 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 31 treesize of output 19 [2024-09-18 16:54:18,440 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 109 treesize of output 81 [2024-09-18 16:54:18,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 77 [2024-09-18 16:54:18,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 13 [2024-09-18 16:54:18,986 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 57 treesize of output 33 [2024-09-18 16:54:19,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-18 16:54:19,076 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 48 treesize of output 32 [2024-09-18 16:54:19,089 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 112 treesize of output 84 [2024-09-18 16:54:19,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2024-09-18 16:54:19,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 17 [2024-09-18 16:54:19,322 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 34 treesize of output 22 [2024-09-18 16:54:19,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-18 16:54:19,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-18 16:54:19,334 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 70 treesize of output 46 [2024-09-18 16:54:19,348 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 23 treesize of output 15 [2024-09-18 16:54:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:54:20,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:54:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 17 refuted. 2 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:54:59,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:54:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320873660] [2024-09-18 16:54:59,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:54:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410151671] [2024-09-18 16:54:59,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410151671] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:54:59,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:54:59,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2024-09-18 16:54:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237851907] [2024-09-18 16:54:59,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:54:59,212 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-18 16:54:59,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:54:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-18 16:54:59,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1740, Unknown=2, NotChecked=0, Total=1980 [2024-09-18 16:54:59,213 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand has 45 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 35 states have internal predecessors, (64), 13 states have call successors, (19), 14 states have call predecessors, (19), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-18 16:56:30,522 WARN L293 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 64 DAG size of output: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)