./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i -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 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-25 00:14:33,152 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:14:33,256 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:14:33,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:14:33,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:14:33,299 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:14:33,300 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:14:33,300 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:14:33,300 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:14:33,301 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:14:33,302 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:14:33,302 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:14:33,304 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:14:33,305 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:14:33,307 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:14:33,307 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:14:33,308 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:14:33,308 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:14:33,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:14:33,309 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:14:33,309 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:14:33,309 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:14:33,310 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:14:33,313 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:14:33,313 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:14:33,314 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:14:33,314 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:14:33,314 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:14:33,314 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:14:33,315 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:14:33,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:14:33,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:14:33,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:14:33,316 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:14:33,316 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:14:33,318 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:14:33,319 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:14:33,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:14:33,319 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:14:33,319 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:14:33,320 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:14:33,320 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:14:33,320 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:14:33,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:14:33,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:14:33,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:14:33,597 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:14:33,598 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:14:33,599 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-25 00:14:35,092 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:14:35,268 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:14:35,269 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-25 00:14:35,277 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7e3b1d0b7/cb4ccba92a5c4c719a2c2609477983d0/FLAGb9f8e779d [2024-09-25 00:14:35,656 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7e3b1d0b7/cb4ccba92a5c4c719a2c2609477983d0 [2024-09-25 00:14:35,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:14:35,660 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:14:35,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:14:35,661 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:14:35,665 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:14:35,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22990af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35, skipping insertion in model container [2024-09-25 00:14:35,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,688 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:14:35,830 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_divbin2.i[1567,1580] [2024-09-25 00:14:35,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:14:35,857 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:14:35,869 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_divbin2.i[1567,1580] [2024-09-25 00:14:35,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:14:35,894 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:14:35,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35 WrapperNode [2024-09-25 00:14:35,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:14:35,896 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:14:35,896 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:14:35,896 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:14:35,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,927 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:14:35,928 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:14:35,929 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:14:35,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:14:35,929 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:14:35,941 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,944 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,961 INFO L175 MemorySlicer]: Split 34 memory accesses to 6 slices as follows [2, 11, 7, 7, 4, 3]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 3, 2, 3, 1, 1]. [2024-09-25 00:14:35,962 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,962 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,971 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,973 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,975 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,976 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,978 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:14:35,979 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:14:35,979 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:14:35,979 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:14:35,980 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (1/1) ... [2024-09-25 00:14:35,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:14:35,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:36,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 00:14:36,016 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 00:14:36,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:14:36,057 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2024-09-25 00:14:36,058 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2024-09-25 00:14:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:14:36,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:14:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:14:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 00:14:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 00:14:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 00:14:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 00:14:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 00:14:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 00:14:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 00:14:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 00:14:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 00:14:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 00:14:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 00:14:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 00:14:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:14:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:14:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2024-09-25 00:14:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2024-09-25 00:14:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:14:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:14:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 00:14:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 00:14:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 00:14:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 00:14:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 00:14:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 00:14:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 00:14:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 00:14:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 00:14:36,198 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:14:36,200 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:14:36,400 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-25 00:14:36,400 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:14:36,426 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:14:36,426 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 00:14:36,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:14:36 BoogieIcfgContainer [2024-09-25 00:14:36,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:14:36,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:14:36,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:14:36,432 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:14:36,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:14:35" (1/3) ... [2024-09-25 00:14:36,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648eafcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:14:36, skipping insertion in model container [2024-09-25 00:14:36,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:35" (2/3) ... [2024-09-25 00:14:36,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648eafcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:14:36, skipping insertion in model container [2024-09-25 00:14:36,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:14:36" (3/3) ... [2024-09-25 00:14:36,436 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2024-09-25 00:14:36,452 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:14:36,452 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 00:14:36,509 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:14:36,515 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;@1674a3ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:14:36,516 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 00:14:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 00:14:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 00:14:36,530 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:36,531 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:36,532 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:36,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:36,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1751035744, now seen corresponding path program 1 times [2024-09-25 00:14:36,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:36,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617081838] [2024-09-25 00:14:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:36,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:36,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:14:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:36,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:14:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:14:36,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:36,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617081838] [2024-09-25 00:14:36,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617081838] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:14:36,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:14:36,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 00:14:36,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776235580] [2024-09-25 00:14:36,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:36,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 00:14:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 00:14:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 00:14:36,852 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-25 00:14:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:36,969 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-09-25 00:14:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 00:14:36,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 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 17 [2024-09-25 00:14:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:36,980 INFO L225 Difference]: With dead ends: 62 [2024-09-25 00:14:36,981 INFO L226 Difference]: Without dead ends: 34 [2024-09-25 00:14:36,984 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 00:14:36,988 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:36,988 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:14:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-25 00:14:37,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-09-25 00:14:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 00:14:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-09-25 00:14:37,026 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2024-09-25 00:14:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:37,027 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-09-25 00:14:37,027 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-25 00:14:37,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:37,028 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-09-25 00:14:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-25 00:14:37,029 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:37,029 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:37,029 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 00:14:37,030 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:37,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:37,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1433330127, now seen corresponding path program 1 times [2024-09-25 00:14:37,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:37,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527484331] [2024-09-25 00:14:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:37,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:37,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065689440] [2024-09-25 00:14:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:37,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:37,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:37,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:14:37,102 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 00:14:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:37,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-25 00:14:37,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:37,339 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 [2024-09-25 00:14:37,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:37,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:14:37,598 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 [2024-09-25 00:14:37,602 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 [2024-09-25 00:14:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:14:37,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 00:14:37,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:37,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527484331] [2024-09-25 00:14:37,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:37,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065689440] [2024-09-25 00:14:37,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065689440] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:14:37,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:14:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-25 00:14:37,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82932895] [2024-09-25 00:14:37,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:37,662 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 00:14:37,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:37,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 00:14:37,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-25 00:14:37,663 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 00:14:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:37,949 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-09-25 00:14:37,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 00:14:37,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-25 00:14:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:37,951 INFO L225 Difference]: With dead ends: 58 [2024-09-25 00:14:37,951 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 00:14:37,953 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-25 00:14:37,954 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:37,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 151 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:14:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 00:14:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2024-09-25 00:14:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-25 00:14:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-09-25 00:14:37,982 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 18 [2024-09-25 00:14:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:37,982 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-09-25 00:14:37,982 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 00:14:37,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-09-25 00:14:37,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-25 00:14:37,984 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:37,985 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] [2024-09-25 00:14:37,993 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 00:14:38,186 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 [2024-09-25 00:14:38,186 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:38,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1475040199, now seen corresponding path program 1 times [2024-09-25 00:14:38,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:38,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027892742] [2024-09-25 00:14:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:38,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:38,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878792391] [2024-09-25 00:14:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:38,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:38,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:38,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:14:38,309 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 00:14:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:38,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-25 00:14:38,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:38,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:14:38,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:38,651 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 [2024-09-25 00:14:38,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:38,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:14:38,878 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 32 treesize of output 32 [2024-09-25 00:14:39,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:14:39,677 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 60 treesize of output 52 [2024-09-25 00:14:39,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:14:39,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 78 [2024-09-25 00:14:39,720 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 [2024-09-25 00:14:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:14:39,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:14:41,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:41,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027892742] [2024-09-25 00:14:41,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:41,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878792391] [2024-09-25 00:14:41,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878792391] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:14:41,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:14:41,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 27 [2024-09-25 00:14:41,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379514346] [2024-09-25 00:14:41,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:14:41,434 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 00:14:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 00:14:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-09-25 00:14:41,438 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 27 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-25 00:14:45,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:14:49,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:14:53,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:14:58,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:15:04,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-25 00:15:08,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:15:09,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:15:09,032 INFO L93 Difference]: Finished difference Result 123 states and 145 transitions. [2024-09-25 00:15:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-25 00:15:09,034 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 28 [2024-09-25 00:15:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:15:09,036 INFO L225 Difference]: With dead ends: 123 [2024-09-25 00:15:09,036 INFO L226 Difference]: Without dead ends: 109 [2024-09-25 00:15:09,037 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 00:15:09,038 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 26 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:15:09,039 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 163 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 414 Invalid, 8 Unknown, 0 Unchecked, 26.2s Time] [2024-09-25 00:15:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-25 00:15:09,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2024-09-25 00:15:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 70 states have internal predecessors, (77), 19 states have call successors, (19), 15 states have call predecessors, (19), 18 states have return successors, (28), 18 states have call predecessors, (28), 15 states have call successors, (28) [2024-09-25 00:15:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2024-09-25 00:15:09,093 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 28 [2024-09-25 00:15:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:15:09,094 INFO L474 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2024-09-25 00:15:09,094 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-25 00:15:09,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2024-09-25 00:15:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-25 00:15:09,095 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:15:09,096 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] [2024-09-25 00:15:09,103 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 00:15:09,296 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:15:09,297 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:15:09,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1066845816, now seen corresponding path program 1 times [2024-09-25 00:15:09,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:15:09,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476209430] [2024-09-25 00:15:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:09,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:15:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:09,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:15:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:10,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:15:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:10,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 00:15:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:15:10,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:15:10,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476209430] [2024-09-25 00:15:10,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476209430] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:15:10,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:15:10,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-25 00:15:10,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658822622] [2024-09-25 00:15:10,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:15:10,043 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 00:15:10,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:10,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 00:15:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-25 00:15:10,044 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 00:15:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:15:10,265 INFO L93 Difference]: Finished difference Result 111 states and 131 transitions. [2024-09-25 00:15:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 00:15:10,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2024-09-25 00:15:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:15:10,268 INFO L225 Difference]: With dead ends: 111 [2024-09-25 00:15:10,268 INFO L226 Difference]: Without dead ends: 56 [2024-09-25 00:15:10,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-09-25 00:15:10,269 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:15:10,270 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 70 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:15:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-25 00:15:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-09-25 00:15:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-25 00:15:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2024-09-25 00:15:10,296 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 29 [2024-09-25 00:15:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:15:10,296 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2024-09-25 00:15:10,296 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 00:15:10,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2024-09-25 00:15:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-25 00:15:10,298 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:15:10,298 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:15:10,299 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-25 00:15:10,299 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:15:10,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash 207588481, now seen corresponding path program 1 times [2024-09-25 00:15:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:15:10,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183611506] [2024-09-25 00:15:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:10,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:15:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:15:10,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639456775] [2024-09-25 00:15:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:10,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:15:10,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:15:10,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:15:10,398 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 00:15:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:10,607 WARN L260 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-09-25 00:15:10,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:15:10,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:15:10,630 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 [2024-09-25 00:15:10,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:15:10,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:15:10,893 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 11 [2024-09-25 00:15:11,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:15:11,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:15:11,692 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-25 00:15:11,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-25 00:15:11,778 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 00:15:11,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-25 00:15:11,829 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-25 00:15:11,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2024-09-25 00:15:12,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:15:12,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 184 [2024-09-25 00:15:12,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:15:12,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 151 treesize of output 175 [2024-09-25 00:15:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:15:12,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:15:27,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:15:27,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183611506] [2024-09-25 00:15:27,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:15:27,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639456775] [2024-09-25 00:15:27,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639456775] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:27,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:15:27,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-25 00:15:27,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681736320] [2024-09-25 00:15:27,549 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:15:27,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 00:15:27,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:27,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 00:15:27,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=731, Unknown=3, NotChecked=0, Total=812 [2024-09-25 00:15:27,550 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 00:15:37,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:15:37,499 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2024-09-25 00:15:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 00:15:37,499 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-09-25 00:15:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:15:37,503 INFO L225 Difference]: With dead ends: 99 [2024-09-25 00:15:37,503 INFO L226 Difference]: Without dead ends: 95 [2024-09-25 00:15:37,504 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=130, Invalid=1197, Unknown=5, NotChecked=0, Total=1332 [2024-09-25 00:15:37,506 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:15:37,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 226 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 530 Invalid, 1 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 00:15:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-25 00:15:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2024-09-25 00:15:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.150943396226415) internal successors, (61), 55 states have internal predecessors, (61), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-25 00:15:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2024-09-25 00:15:37,551 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 35 [2024-09-25 00:15:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:15:37,552 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2024-09-25 00:15:37,552 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 00:15:37,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2024-09-25 00:15:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-25 00:15:37,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:15:37,554 INFO L216 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-09-25 00:15:37,563 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 00:15:37,754 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 [2024-09-25 00:15:37,755 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:15:37,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash 646627578, now seen corresponding path program 2 times [2024-09-25 00:15:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:15:37,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688178195] [2024-09-25 00:15:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:15:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:15:37,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635850707] [2024-09-25 00:15:37,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:15:37,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:15:37,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:15:37,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:15:37,888 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 00:15:38,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:15:38,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:15:38,134 WARN L260 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 174 conjuncts are in the unsatisfiable core [2024-09-25 00:15:38,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:15:38,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:15:38,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:15:38,156 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 [2024-09-25 00:15:38,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:15:38,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:15:38,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:15:38,827 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-25 00:15:38,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-25 00:15:38,934 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-25 00:15:38,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2024-09-25 00:15:39,001 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 00:15:39,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-25 00:15:39,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:15:39,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 184 [2024-09-25 00:15:39,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:15:39,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 119 [2024-09-25 00:15:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 00:15:39,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:15:50,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:15:50,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688178195] [2024-09-25 00:15:50,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:15:50,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635850707] [2024-09-25 00:15:50,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635850707] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:50,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:15:50,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-25 00:15:50,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552053622] [2024-09-25 00:15:50,937 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:15:50,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 00:15:50,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 00:15:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=783, Unknown=2, NotChecked=0, Total=870 [2024-09-25 00:15:50,939 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 8 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 00:15:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:15:52,561 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2024-09-25 00:15:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 00:15:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 8 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 41 [2024-09-25 00:15:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:15:52,563 INFO L225 Difference]: With dead ends: 114 [2024-09-25 00:15:52,564 INFO L226 Difference]: Without dead ends: 110 [2024-09-25 00:15:52,564 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=135, Invalid=1123, Unknown=2, NotChecked=0, Total=1260 [2024-09-25 00:15:52,566 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-25 00:15:52,567 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 336 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-25 00:15:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-25 00:15:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 85. [2024-09-25 00:15:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 56 states have internal predecessors, (62), 15 states have call successors, (15), 13 states have call predecessors, (15), 15 states have return successors, (24), 15 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-25 00:15:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2024-09-25 00:15:52,601 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 41 [2024-09-25 00:15:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:15:52,602 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2024-09-25 00:15:52,602 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 8 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 00:15:52,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2024-09-25 00:15:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 00:15:52,603 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:15:52,604 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:15:52,613 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-25 00:15:52,806 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 [2024-09-25 00:15:52,807 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:15:52,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:52,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1653823757, now seen corresponding path program 3 times [2024-09-25 00:15:52,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:15:52,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474841818] [2024-09-25 00:15:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:52,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:15:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:15:52,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563905158] [2024-09-25 00:15:52,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:15:52,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:15:52,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:15:52,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:15:52,912 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 00:15:53,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-25 00:15:53,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:15:53,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-25 00:15:53,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:15:53,353 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 [2024-09-25 00:15:53,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:15:53,389 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 11 treesize of output 7 [2024-09-25 00:15:53,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:15:53,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:15:53,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:15:53,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-25 00:15:53,705 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 25 treesize of output 17 [2024-09-25 00:15:53,710 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 [2024-09-25 00:15:53,714 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 [2024-09-25 00:15:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-25 00:15:53,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:15:58,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:15:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474841818] [2024-09-25 00:15:58,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:15:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563905158] [2024-09-25 00:15:58,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563905158] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:58,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:15:58,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-25 00:15:58,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493626668] [2024-09-25 00:15:58,035 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:15:58,036 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 00:15:58,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 00:15:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=173, Unknown=1, NotChecked=0, Total=210 [2024-09-25 00:15:58,037 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 00:15:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:15:58,472 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2024-09-25 00:15:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 00:15:58,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2024-09-25 00:15:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:15:58,474 INFO L225 Difference]: With dead ends: 105 [2024-09-25 00:15:58,474 INFO L226 Difference]: Without dead ends: 103 [2024-09-25 00:15:58,475 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2024-09-25 00:15:58,475 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:15:58,475 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 228 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:15:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-25 00:15:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2024-09-25 00:15:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 66 states have internal predecessors, (72), 17 states have call successors, (17), 15 states have call predecessors, (17), 18 states have return successors, (29), 17 states have call predecessors, (29), 14 states have call successors, (29) [2024-09-25 00:15:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2024-09-25 00:15:58,537 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 47 [2024-09-25 00:15:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:15:58,537 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2024-09-25 00:15:58,538 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 00:15:58,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2024-09-25 00:15:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 00:15:58,541 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:15:58,542 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2024-09-25 00:15:58,551 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-25 00:15:58,742 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 [2024-09-25 00:15:58,742 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:15:58,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:58,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2101514835, now seen corresponding path program 1 times [2024-09-25 00:15:58,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:15:58,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756429412] [2024-09-25 00:15:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:58,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:15:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:59,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:15:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:59,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:15:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:59,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:15:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:00,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 00:16:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:00,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:00,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 00:16:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:00,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 00:16:00,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:16:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756429412] [2024-09-25 00:16:00,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756429412] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:16:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413601792] [2024-09-25 00:16:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:00,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:16:00,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:16:00,824 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:16:00,826 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 00:16:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:00,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-09-25 00:16:00,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:16:00,981 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 11 [2024-09-25 00:16:00,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:16:00,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:00,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:01,238 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 11 [2024-09-25 00:16:01,319 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 7 treesize of output 3 [2024-09-25 00:16:01,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:16:02,214 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 33 treesize of output 25 [2024-09-25 00:16:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:16:02,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:16:02,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:16:03,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413601792] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:16:03,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:16:03,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2024-09-25 00:16:03,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773025435] [2024-09-25 00:16:03,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:16:03,792 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-25 00:16:03,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:16:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-25 00:16:03,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1813, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 00:16:03,794 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 33 states, 25 states have (on average 2.04) internal successors, (51), 27 states have internal predecessors, (51), 13 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-25 00:16:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:16:06,213 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2024-09-25 00:16:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 00:16:06,214 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.04) internal successors, (51), 27 states have internal predecessors, (51), 13 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 47 [2024-09-25 00:16:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:16:06,215 INFO L225 Difference]: With dead ends: 113 [2024-09-25 00:16:06,215 INFO L226 Difference]: Without dead ends: 97 [2024-09-25 00:16:06,218 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=400, Invalid=3506, Unknown=0, NotChecked=0, Total=3906 [2024-09-25 00:16:06,219 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:16:06,220 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 92 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-25 00:16:06,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-25 00:16:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-09-25 00:16:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 64 states have internal predecessors, (68), 18 states have call successors, (18), 14 states have call predecessors, (18), 18 states have return successors, (40), 18 states have call predecessors, (40), 16 states have call successors, (40) [2024-09-25 00:16:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2024-09-25 00:16:06,289 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 47 [2024-09-25 00:16:06,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:16:06,290 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2024-09-25 00:16:06,290 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.04) internal successors, (51), 27 states have internal predecessors, (51), 13 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-25 00:16:06,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2024-09-25 00:16:06,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 00:16:06,292 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:16:06,292 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:16:06,308 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 00:16:06,496 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 [2024-09-25 00:16:06,497 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:16:06,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:06,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1905411784, now seen corresponding path program 4 times [2024-09-25 00:16:06,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:16:06,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693204202] [2024-09-25 00:16:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:06,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:16:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:07,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:16:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:07,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:16:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:07,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:16:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:07,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 00:16:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:07,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 00:16:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 00:16:07,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:16:07,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693204202] [2024-09-25 00:16:07,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693204202] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:16:07,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909179580] [2024-09-25 00:16:07,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:16:07,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:16:07,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:16:07,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:16:07,762 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 00:16:08,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:16:08,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:16:08,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 173 conjuncts are in the unsatisfiable core [2024-09-25 00:16:08,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:16:08,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:08,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:16:08,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:16:08,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:08,447 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 11 [2024-09-25 00:16:08,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:16:08,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:16:08,941 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 30 treesize of output 30 [2024-09-25 00:16:09,417 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-25 00:16:09,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-09-25 00:16:09,600 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-25 00:16:09,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 48 [2024-09-25 00:16:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:16:10,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:16:14,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909179580] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:16:14,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:16:14,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 34 [2024-09-25 00:16:14,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727711857] [2024-09-25 00:16:14,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:16:14,657 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 00:16:14,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:16:14,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 00:16:14,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1424, Unknown=1, NotChecked=0, Total=1560 [2024-09-25 00:16:14,658 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 34 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 00:16:28,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 00:16:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:16:28,974 INFO L93 Difference]: Finished difference Result 178 states and 223 transitions. [2024-09-25 00:16:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 00:16:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 46 [2024-09-25 00:16:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:16:28,976 INFO L225 Difference]: With dead ends: 178 [2024-09-25 00:16:28,976 INFO L226 Difference]: Without dead ends: 127 [2024-09-25 00:16:28,978 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=277, Invalid=2690, Unknown=3, NotChecked=0, Total=2970 [2024-09-25 00:16:28,978 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:16:28,978 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 140 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 888 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2024-09-25 00:16:28,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-25 00:16:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2024-09-25 00:16:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 82 states have internal predecessors, (87), 22 states have call successors, (22), 19 states have call predecessors, (22), 21 states have return successors, (35), 21 states have call predecessors, (35), 19 states have call successors, (35) [2024-09-25 00:16:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2024-09-25 00:16:29,084 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 46 [2024-09-25 00:16:29,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:16:29,084 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2024-09-25 00:16:29,085 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 00:16:29,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2024-09-25 00:16:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 00:16:29,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:16:29,088 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2024-09-25 00:16:29,111 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 00:16:29,294 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:16:29,295 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:16:29,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:29,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1283866385, now seen corresponding path program 1 times [2024-09-25 00:16:29,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:16:29,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380829480] [2024-09-25 00:16:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:29,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:16:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:16:29,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098500141] [2024-09-25 00:16:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:29,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:16:29,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:16:29,347 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:16:29,348 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 00:16:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:29,684 WARN L260 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 174 conjuncts are in the unsatisfiable core [2024-09-25 00:16:29,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:16:29,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:29,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:29,702 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 [2024-09-25 00:16:29,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:16:29,927 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 11 [2024-09-25 00:16:30,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:16:30,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:16:30,250 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 32 treesize of output 32 [2024-09-25 00:16:31,410 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 00:16:31,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-25 00:16:31,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:16:31,432 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 32 treesize of output 32 [2024-09-25 00:16:31,441 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 3 [2024-09-25 00:16:31,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:16:31,512 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 26 treesize of output 26 [2024-09-25 00:16:31,522 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 [2024-09-25 00:16:31,528 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 [2024-09-25 00:16:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 00:16:31,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:16:45,937 WARN L293 SmtUtils]: Spent 13.68s on a formula simplification that was a NOOP. DAG size: 127 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-25 00:16:52,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:16:52,515 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 56 treesize of output 59 [2024-09-25 00:17:49,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:17:49,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380829480] [2024-09-25 00:17:49,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:17:49,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098500141] [2024-09-25 00:17:49,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098500141] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:17:49,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:17:49,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-25 00:17:49,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976077009] [2024-09-25 00:17:49,597 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:17:49,597 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 00:17:49,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:17:49,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 00:17:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=941, Unknown=11, NotChecked=0, Total=1056 [2024-09-25 00:17:49,598 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 00:17:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:17:57,394 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2024-09-25 00:17:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 00:17:57,395 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-25 00:17:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:17:57,396 INFO L225 Difference]: With dead ends: 125 [2024-09-25 00:17:57,396 INFO L226 Difference]: Without dead ends: 94 [2024-09-25 00:17:57,397 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=263, Invalid=2077, Unknown=12, NotChecked=0, Total=2352 [2024-09-25 00:17:57,398 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 00:17:57,398 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 163 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 430 Invalid, 2 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 00:17:57,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-25 00:17:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-09-25 00:17:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 63 states have internal predecessors, (67), 17 states have call successors, (17), 14 states have call predecessors, (17), 17 states have return successors, (30), 16 states have call predecessors, (30), 15 states have call successors, (30) [2024-09-25 00:17:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2024-09-25 00:17:57,448 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 47 [2024-09-25 00:17:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:17:57,448 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2024-09-25 00:17:57,448 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 00:17:57,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:17:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2024-09-25 00:17:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-25 00:17:57,449 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:17:57,449 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:17:57,458 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 00:17:57,649 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:17:57,650 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:17:57,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:17:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1276039393, now seen corresponding path program 5 times [2024-09-25 00:17:57,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:17:57,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758536274] [2024-09-25 00:17:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:17:57,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:17:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:17:57,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358523923] [2024-09-25 00:17:57,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:17:57,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:17:57,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:17:57,777 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:17:57,778 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 00:17:58,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-25 00:17:58,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:17:58,404 WARN L260 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 259 conjuncts are in the unsatisfiable core [2024-09-25 00:17:58,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:17:58,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:17:58,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:17:58,438 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 [2024-09-25 00:17:58,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:17:58,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:17:59,607 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-25 00:17:59,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-25 00:17:59,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:17:59,737 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-25 00:17:59,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-09-25 00:17:59,778 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-25 00:17:59,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 53 [2024-09-25 00:18:00,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:00,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:01,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:01,057 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-25 00:18:01,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 108 treesize of output 110 [2024-09-25 00:18:02,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:18:02,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 184 treesize of output 364 [2024-09-25 00:18:02,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:18:02,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 166 treesize of output 314 [2024-09-25 00:18:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-25 00:18:04,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:06,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:06,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758536274] [2024-09-25 00:18:06,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:06,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358523923] [2024-09-25 00:18:06,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358523923] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:18:06,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:18:06,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-25 00:18:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558805030] [2024-09-25 00:18:06,318 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:18:06,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 00:18:06,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 00:18:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1221, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 00:18:06,320 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 00:18:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:09,778 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2024-09-25 00:18:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 00:18:09,779 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2024-09-25 00:18:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:09,780 INFO L225 Difference]: With dead ends: 120 [2024-09-25 00:18:09,781 INFO L226 Difference]: Without dead ends: 116 [2024-09-25 00:18:09,784 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 00:18:09,785 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 38 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:09,785 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 382 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-25 00:18:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-25 00:18:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-09-25 00:18:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 76 states have internal predecessors, (82), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (35), 19 states have call predecessors, (35), 17 states have call successors, (35) [2024-09-25 00:18:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2024-09-25 00:18:09,868 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 52 [2024-09-25 00:18:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:09,868 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2024-09-25 00:18:09,868 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 00:18:09,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2024-09-25 00:18:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-25 00:18:09,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:09,869 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:09,885 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 00:18:10,075 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 00:18:10,076 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:10,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2085386019, now seen corresponding path program 1 times [2024-09-25 00:18:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:10,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161658835] [2024-09-25 00:18:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:10,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176727302] [2024-09-25 00:18:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:10,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:10,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:10,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:18:10,146 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 00:18:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:10,432 WARN L260 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 263 conjuncts are in the unsatisfiable core [2024-09-25 00:18:10,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:10,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:18:10,445 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 [2024-09-25 00:18:10,451 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 [2024-09-25 00:18:10,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:10,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:10,678 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 11 [2024-09-25 00:18:11,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:11,823 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-25 00:18:11,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-25 00:18:11,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:11,930 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 00:18:11,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-25 00:18:11,973 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-25 00:18:11,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 61 [2024-09-25 00:18:13,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:13,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:13,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:18:13,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 172 [2024-09-25 00:18:13,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:18:13,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 113 [2024-09-25 00:18:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 00:18:14,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:38,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:38,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161658835] [2024-09-25 00:18:38,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:38,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176727302] [2024-09-25 00:18:38,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176727302] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:18:38,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:18:38,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-25 00:18:38,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490824619] [2024-09-25 00:18:38,264 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:18:38,264 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 00:18:38,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:38,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 00:18:38,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1641, Unknown=4, NotChecked=0, Total=1806 [2024-09-25 00:18:38,265 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 9 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)