./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 16:39:33,549 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:39:33,628 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:39:33,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:39:33,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:39:33,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:39:33,673 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:39:33,674 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:39:33,674 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:39:33,676 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:39:33,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:39:33,679 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:39:33,680 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:39:33,680 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:39:33,680 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:39:33,680 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:39:33,681 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:39:33,681 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:39:33,681 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:39:33,682 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:39:33,682 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:39:33,685 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:39:33,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:39:33,686 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:39:33,686 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:39:33,686 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:39:33,687 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:39:33,687 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:39:33,687 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:39:33,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:39:33,688 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:39:33,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:39:33,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:39:33,688 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:39:33,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:39:33,689 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:39:33,690 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:39:33,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:39:33,691 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:39:33,691 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:39:33,691 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:39:33,692 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:39:33,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:39:33,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:39:34,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:39:34,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:39:34,011 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:39:34,012 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:39:34,013 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-12 16:39:35,450 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:39:35,649 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:39:35,650 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-12 16:39:35,657 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/37f72cd43/404e15f8b7604decbcec01ae588b3155/FLAGe2f25d3b0 [2024-09-12 16:39:35,667 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/37f72cd43/404e15f8b7604decbcec01ae588b3155 [2024-09-12 16:39:35,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:39:35,670 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:39:35,671 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:39:35,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:39:35,677 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:39:35,677 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:35,678 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29febb98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35, skipping insertion in model container [2024-09-12 16:39:35,678 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:35,698 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:39:35,864 WARN L247 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_hard2.c[1067,1080] [2024-09-12 16:39:35,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:39:35,910 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:39:35,923 WARN L247 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_hard2.c[1067,1080] [2024-09-12 16:39:35,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:39:35,967 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:39:35,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35 WrapperNode [2024-09-12 16:39:35,968 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:39:35,969 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:39:35,970 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:39:35,970 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:39:35,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:35,984 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:35,992 INFO L138 Inliner]: procedures = 17, calls = 90, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:39:35,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:39:35,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:39:35,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:39:35,994 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:39:36,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:36,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:36,006 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:36,036 INFO L175 MemorySlicer]: Split 56 memory accesses to 8 slices as follows [2, 8, 12, 6, 8, 6, 5, 9]. 21 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 0, 3, 1, 2, 2, 1, 3]. [2024-09-12 16:39:36,040 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:36,040 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:36,064 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:36,070 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:36,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:36,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:36,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:39:36,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:39:36,084 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:39:36,084 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:39:36,085 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (1/1) ... [2024-09-12 16:39:36,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:39:36,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:36,116 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) [2024-09-12 16:39:36,122 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 [2024-09-12 16:39:36,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:39:36,164 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2024-09-12 16:39:36,164 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2024-09-12 16:39:36,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:39:36,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:39:36,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:39:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 16:39:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 16:39:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-12 16:39:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-12 16:39:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-12 16:39:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-12 16:39:36,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-12 16:39:36,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 16:39:36,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 16:39:36,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 16:39:36,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 16:39:36,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-12 16:39:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-12 16:39:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-12 16:39:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-12 16:39:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-12 16:39:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:39:36,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:39:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2024-09-12 16:39:36,168 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2024-09-12 16:39:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:39:36,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:39:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 16:39:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 16:39:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 16:39:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-12 16:39:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-12 16:39:36,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-12 16:39:36,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-12 16:39:36,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-12 16:39:36,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 16:39:36,169 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 16:39:36,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 16:39:36,289 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:39:36,291 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:39:36,596 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-12 16:39:36,598 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:39:36,622 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:39:36,622 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 16:39:36,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:39:36 BoogieIcfgContainer [2024-09-12 16:39:36,622 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:39:36,624 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:39:36,624 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:39:36,627 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:39:36,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:39:35" (1/3) ... [2024-09-12 16:39:36,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e48d24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:39:36, skipping insertion in model container [2024-09-12 16:39:36,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:39:35" (2/3) ... [2024-09-12 16:39:36,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e48d24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:39:36, skipping insertion in model container [2024-09-12 16:39:36,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:39:36" (3/3) ... [2024-09-12 16:39:36,631 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2024-09-12 16:39:36,645 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:39:36,646 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:39:36,699 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:39:36,704 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;@5175677f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:39:36,705 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:39:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 16:39:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 16:39:36,715 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:36,716 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:36,716 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:36,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash -237389290, now seen corresponding path program 1 times [2024-09-12 16:39:36,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:36,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623521703] [2024-09-12 16:39:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:36,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:37,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:39:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:39:37,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:37,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623521703] [2024-09-12 16:39:37,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623521703] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:39:37,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:39:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 16:39:37,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135109058] [2024-09-12 16:39:37,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:39:37,326 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:39:37,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:37,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:39:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:39:37,349 INFO L87 Difference]: Start difference. First operand has 44 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 16:39:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:37,522 INFO L93 Difference]: Finished difference Result 86 states and 122 transitions. [2024-09-12 16:39:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:39:37,524 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-12 16:39:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:37,531 INFO L225 Difference]: With dead ends: 86 [2024-09-12 16:39:37,531 INFO L226 Difference]: Without dead ends: 44 [2024-09-12 16:39:37,534 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:39:37,540 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 18 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:37,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 255 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:39:37,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-12 16:39:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-12 16:39:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 16:39:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-09-12 16:39:37,607 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 12 [2024-09-12 16:39:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:37,608 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-09-12 16:39:37,609 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 16:39:37,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-09-12 16:39:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-12 16:39:37,625 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:37,625 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:37,626 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:39:37,630 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:37,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:37,631 INFO L85 PathProgramCache]: Analyzing trace with hash -603068878, now seen corresponding path program 1 times [2024-09-12 16:39:37,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:37,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248674016] [2024-09-12 16:39:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:37,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:37,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:39:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:37,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:39:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:39:38,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:38,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248674016] [2024-09-12 16:39:38,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248674016] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:39:38,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:39:38,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 16:39:38,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103209451] [2024-09-12 16:39:38,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:39:38,006 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:39:38,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:38,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:39:38,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:39:38,011 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 16:39:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:38,180 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-12 16:39:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:39:38,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-12 16:39:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:38,181 INFO L225 Difference]: With dead ends: 50 [2024-09-12 16:39:38,182 INFO L226 Difference]: Without dead ends: 48 [2024-09-12 16:39:38,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:39:38,183 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:38,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 240 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:39:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-12 16:39:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-12 16:39:38,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 16:39:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-09-12 16:39:38,194 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2024-09-12 16:39:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:38,194 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-09-12 16:39:38,194 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 16:39:38,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-09-12 16:39:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 16:39:38,196 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:38,196 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:38,196 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 16:39:38,196 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:38,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:38,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1373219252, now seen corresponding path program 1 times [2024-09-12 16:39:38,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:38,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270964135] [2024-09-12 16:39:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:38,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:38,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501216538] [2024-09-12 16:39:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:38,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:38,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:38,226 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) [2024-09-12 16:39:38,229 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:39:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:38,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 16:39:38,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:38,398 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 [2024-09-12 16:39:38,405 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 [2024-09-12 16:39:38,412 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 [2024-09-12 16:39:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:39:38,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:39:38,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:38,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270964135] [2024-09-12 16:39:38,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:38,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501216538] [2024-09-12 16:39:38,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501216538] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:38,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:38,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-12 16:39:38,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954369960] [2024-09-12 16:39:38,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:39:38,939 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:39:38,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:39:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:39:38,940 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:39:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:39,197 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-09-12 16:39:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:39:39,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-12 16:39:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:39,201 INFO L225 Difference]: With dead ends: 59 [2024-09-12 16:39:39,203 INFO L226 Difference]: Without dead ends: 57 [2024-09-12 16:39:39,204 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:39:39,205 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:39,206 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 232 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:39:39,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-12 16:39:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-09-12 16:39:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 16:39:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-09-12 16:39:39,226 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 24 [2024-09-12 16:39:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:39,226 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-09-12 16:39:39,226 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:39:39,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-09-12 16:39:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 16:39:39,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:39,228 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:39,243 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:39:39,428 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:39,429 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:39,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:39,430 INFO L85 PathProgramCache]: Analyzing trace with hash 257250778, now seen corresponding path program 1 times [2024-09-12 16:39:39,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:39,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026251070] [2024-09-12 16:39:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:39,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:39,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986949338] [2024-09-12 16:39:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:39,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:39,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:39,479 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) [2024-09-12 16:39:39,480 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:39:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:39,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-12 16:39:39,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:39,630 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 11 treesize of output 7 [2024-09-12 16:39:39,640 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 [2024-09-12 16:39:39,647 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 [2024-09-12 16:39:39,659 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 [2024-09-12 16:39:40,028 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 [2024-09-12 16:39:40,032 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 [2024-09-12 16:39:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:39:40,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:39:40,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:40,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026251070] [2024-09-12 16:39:40,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:40,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986949338] [2024-09-12 16:39:40,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986949338] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:40,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:40,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-12 16:39:40,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365883169] [2024-09-12 16:39:40,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:39:40,289 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:39:40,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:39:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:39:40,290 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 16:39:40,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:40,538 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-09-12 16:39:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:39:40,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-12 16:39:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:40,544 INFO L225 Difference]: With dead ends: 72 [2024-09-12 16:39:40,544 INFO L226 Difference]: Without dead ends: 70 [2024-09-12 16:39:40,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:39:40,545 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 19 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:40,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 252 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:39:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-12 16:39:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-09-12 16:39:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2024-09-12 16:39:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2024-09-12 16:39:40,569 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 36 [2024-09-12 16:39:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:40,569 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2024-09-12 16:39:40,570 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 16:39:40,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2024-09-12 16:39:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 16:39:40,571 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:40,571 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:40,589 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 16:39:40,772 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:40,772 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:40,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:40,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1949399703, now seen corresponding path program 1 times [2024-09-12 16:39:40,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:40,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020251388] [2024-09-12 16:39:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:40,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:40,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272601432] [2024-09-12 16:39:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:40,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:40,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:40,823 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) [2024-09-12 16:39:40,825 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 16:39:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:40,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 16:39:40,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:40,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:39:40,973 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 [2024-09-12 16:39:40,977 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 [2024-09-12 16:39:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:39:41,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:41,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:41,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020251388] [2024-09-12 16:39:41,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:41,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272601432] [2024-09-12 16:39:41,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272601432] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:41,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:41,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-12 16:39:41,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623963000] [2024-09-12 16:39:41,873 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:41,874 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 16:39:41,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:41,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 16:39:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:39:41,876 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 16:39:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:42,454 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2024-09-12 16:39:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 16:39:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-09-12 16:39:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:42,456 INFO L225 Difference]: With dead ends: 126 [2024-09-12 16:39:42,456 INFO L226 Difference]: Without dead ends: 124 [2024-09-12 16:39:42,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-09-12 16:39:42,457 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 84 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:42,457 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 132 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 16:39:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-12 16:39:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2024-09-12 16:39:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 81 states have internal predecessors, (86), 24 states have call successors, (24), 18 states have call predecessors, (24), 20 states have return successors, (30), 22 states have call predecessors, (30), 21 states have call successors, (30) [2024-09-12 16:39:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2024-09-12 16:39:42,499 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 42 [2024-09-12 16:39:42,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:42,500 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2024-09-12 16:39:42,500 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 16:39:42,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2024-09-12 16:39:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 16:39:42,502 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:42,502 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:42,521 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 16:39:42,703 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 [2024-09-12 16:39:42,705 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:42,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:42,706 INFO L85 PathProgramCache]: Analyzing trace with hash -605627993, now seen corresponding path program 1 times [2024-09-12 16:39:42,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:42,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426306129] [2024-09-12 16:39:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:42,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:42,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363753573] [2024-09-12 16:39:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:42,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:42,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:42,753 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) [2024-09-12 16:39:42,754 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 16:39:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:42,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 16:39:42,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:42,897 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 [2024-09-12 16:39:42,901 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 [2024-09-12 16:39:43,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:39:43,093 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 [2024-09-12 16:39:43,096 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 [2024-09-12 16:39:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 16:39:43,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:43,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:43,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426306129] [2024-09-12 16:39:43,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:43,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363753573] [2024-09-12 16:39:43,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363753573] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:43,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:43,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-12 16:39:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937472092] [2024-09-12 16:39:43,355 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:43,355 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:39:43,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:39:43,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-12 16:39:43,357 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-12 16:39:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:43,704 INFO L93 Difference]: Finished difference Result 147 states and 169 transitions. [2024-09-12 16:39:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:39:43,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2024-09-12 16:39:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:43,707 INFO L225 Difference]: With dead ends: 147 [2024-09-12 16:39:43,707 INFO L226 Difference]: Without dead ends: 143 [2024-09-12 16:39:43,708 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:39:43,711 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:43,712 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 88 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:39:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-12 16:39:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2024-09-12 16:39:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 87 states have (on average 1.103448275862069) internal successors, (96), 91 states have internal predecessors, (96), 27 states have call successors, (27), 21 states have call predecessors, (27), 22 states have return successors, (33), 25 states have call predecessors, (33), 23 states have call successors, (33) [2024-09-12 16:39:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2024-09-12 16:39:43,765 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 52 [2024-09-12 16:39:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:43,765 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2024-09-12 16:39:43,765 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-12 16:39:43,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2024-09-12 16:39:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-12 16:39:43,767 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:43,767 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:43,782 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 16:39:43,971 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 [2024-09-12 16:39:43,972 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:43,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:43,972 INFO L85 PathProgramCache]: Analyzing trace with hash -649217709, now seen corresponding path program 1 times [2024-09-12 16:39:43,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:43,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749664069] [2024-09-12 16:39:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:43,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:39:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:39:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:39:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:39:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:39:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 16:39:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 16:39:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 16:39:44,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:44,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749664069] [2024-09-12 16:39:44,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749664069] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:39:44,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:39:44,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 16:39:44,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540850067] [2024-09-12 16:39:44,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:39:44,324 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:39:44,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:44,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:39:44,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:39:44,326 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-12 16:39:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:44,582 INFO L93 Difference]: Finished difference Result 192 states and 222 transitions. [2024-09-12 16:39:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 16:39:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2024-09-12 16:39:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:44,587 INFO L225 Difference]: With dead ends: 192 [2024-09-12 16:39:44,587 INFO L226 Difference]: Without dead ends: 139 [2024-09-12 16:39:44,587 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:39:44,590 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:44,590 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 104 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:39:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-12 16:39:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2024-09-12 16:39:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 90 states have internal predecessors, (94), 27 states have call successors, (27), 21 states have call predecessors, (27), 21 states have return successors, (29), 25 states have call predecessors, (29), 23 states have call successors, (29) [2024-09-12 16:39:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2024-09-12 16:39:44,653 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 53 [2024-09-12 16:39:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:44,653 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2024-09-12 16:39:44,653 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-12 16:39:44,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2024-09-12 16:39:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 16:39:44,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:44,659 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:44,659 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-12 16:39:44,659 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:44,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash 217789429, now seen corresponding path program 1 times [2024-09-12 16:39:44,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:44,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162730329] [2024-09-12 16:39:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:44,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:39:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:39:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:39:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:39:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:39:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 16:39:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:39:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:39:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 16:39:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 16:39:44,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:44,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162730329] [2024-09-12 16:39:44,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162730329] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:39:44,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:39:44,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-12 16:39:44,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32253503] [2024-09-12 16:39:44,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:39:44,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 16:39:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 16:39:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-12 16:39:44,998 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-12 16:39:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:45,262 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2024-09-12 16:39:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 16:39:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-12 16:39:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:45,265 INFO L225 Difference]: With dead ends: 141 [2024-09-12 16:39:45,265 INFO L226 Difference]: Without dead ends: 109 [2024-09-12 16:39:45,266 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:39:45,266 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:45,267 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 79 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:39:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-12 16:39:45,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2024-09-12 16:39:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 22 states have call successors, (22), 16 states have call predecessors, (22), 16 states have return successors, (24), 20 states have call predecessors, (24), 19 states have call successors, (24) [2024-09-12 16:39:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2024-09-12 16:39:45,306 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 58 [2024-09-12 16:39:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:45,306 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2024-09-12 16:39:45,307 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-12 16:39:45,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2024-09-12 16:39:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-12 16:39:45,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:45,309 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 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] [2024-09-12 16:39:45,309 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-12 16:39:45,310 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:45,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:45,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1027870564, now seen corresponding path program 1 times [2024-09-12 16:39:45,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:45,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096918351] [2024-09-12 16:39:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:45,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:45,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573028615] [2024-09-12 16:39:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:45,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:45,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:45,355 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) [2024-09-12 16:39:45,356 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 16:39:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:45,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-12 16:39:45,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:45,517 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 [2024-09-12 16:39:45,521 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 [2024-09-12 16:39:45,525 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 [2024-09-12 16:39:45,913 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 [2024-09-12 16:39:45,919 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 [2024-09-12 16:39:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-12 16:39:46,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:46,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:46,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096918351] [2024-09-12 16:39:46,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:46,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573028615] [2024-09-12 16:39:46,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573028615] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:46,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:46,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-12 16:39:46,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234605288] [2024-09-12 16:39:46,533 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:46,533 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 16:39:46,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 16:39:46,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-09-12 16:39:46,535 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-12 16:39:47,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:47,301 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2024-09-12 16:39:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 16:39:47,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 66 [2024-09-12 16:39:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:47,303 INFO L225 Difference]: With dead ends: 145 [2024-09-12 16:39:47,303 INFO L226 Difference]: Without dead ends: 141 [2024-09-12 16:39:47,304 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2024-09-12 16:39:47,305 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:47,305 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 159 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 16:39:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-12 16:39:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2024-09-12 16:39:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 90 states have internal predecessors, (95), 27 states have call successors, (27), 21 states have call predecessors, (27), 22 states have return successors, (34), 26 states have call predecessors, (34), 23 states have call successors, (34) [2024-09-12 16:39:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2024-09-12 16:39:47,348 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 66 [2024-09-12 16:39:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:47,349 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2024-09-12 16:39:47,349 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-12 16:39:47,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2024-09-12 16:39:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-12 16:39:47,350 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:47,350 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:47,370 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 16:39:47,554 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:47,555 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:47,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash -409790049, now seen corresponding path program 2 times [2024-09-12 16:39:47,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:47,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719069437] [2024-09-12 16:39:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:47,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:47,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747823512] [2024-09-12 16:39:47,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:39:47,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:47,610 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) [2024-09-12 16:39:47,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 16:39:47,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:39:47,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:39:47,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-12 16:39:47,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:47,806 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 [2024-09-12 16:39:47,811 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 [2024-09-12 16:39:47,816 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 [2024-09-12 16:39:48,429 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 [2024-09-12 16:39:48,434 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 [2024-09-12 16:39:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 43 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-12 16:39:48,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:49,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:49,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719069437] [2024-09-12 16:39:49,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:49,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747823512] [2024-09-12 16:39:49,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747823512] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:49,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:49,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-12 16:39:49,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742013375] [2024-09-12 16:39:49,307 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:49,307 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 16:39:49,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:49,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 16:39:49,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-12 16:39:49,308 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand has 17 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-12 16:39:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:50,327 INFO L93 Difference]: Finished difference Result 175 states and 198 transitions. [2024-09-12 16:39:50,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:39:50,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 90 [2024-09-12 16:39:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:50,330 INFO L225 Difference]: With dead ends: 175 [2024-09-12 16:39:50,330 INFO L226 Difference]: Without dead ends: 171 [2024-09-12 16:39:50,330 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2024-09-12 16:39:50,331 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 43 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:50,331 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 242 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 740 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 16:39:50,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-12 16:39:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2024-09-12 16:39:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 91 states have internal predecessors, (96), 27 states have call successors, (27), 21 states have call predecessors, (27), 23 states have return successors, (36), 27 states have call predecessors, (36), 23 states have call successors, (36) [2024-09-12 16:39:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 159 transitions. [2024-09-12 16:39:50,380 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 159 transitions. Word has length 90 [2024-09-12 16:39:50,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:50,382 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 159 transitions. [2024-09-12 16:39:50,382 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-12 16:39:50,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:50,383 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 159 transitions. [2024-09-12 16:39:50,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-09-12 16:39:50,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:50,384 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:50,401 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 16:39:50,584 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 16:39:50,585 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:50,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:50,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1410569242, now seen corresponding path program 3 times [2024-09-12 16:39:50,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:50,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353695745] [2024-09-12 16:39:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:50,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:50,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668857282] [2024-09-12 16:39:50,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:39:50,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:50,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:50,628 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) [2024-09-12 16:39:50,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 16:39:50,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 16:39:50,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:39:50,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-09-12 16:39:50,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:50,864 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 [2024-09-12 16:39:50,871 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 [2024-09-12 16:39:50,876 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 [2024-09-12 16:39:51,631 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 [2024-09-12 16:39:51,645 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 [2024-09-12 16:39:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-09-12 16:39:51,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:52,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:52,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353695745] [2024-09-12 16:39:52,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:52,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668857282] [2024-09-12 16:39:52,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668857282] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:52,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:52,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-12 16:39:52,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942855168] [2024-09-12 16:39:52,997 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:52,998 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 16:39:52,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 16:39:52,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2024-09-12 16:39:52,999 INFO L87 Difference]: Start difference. First operand 139 states and 159 transitions. Second operand has 20 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-12 16:39:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:54,215 INFO L93 Difference]: Finished difference Result 177 states and 201 transitions. [2024-09-12 16:39:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 16:39:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 114 [2024-09-12 16:39:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:54,218 INFO L225 Difference]: With dead ends: 177 [2024-09-12 16:39:54,218 INFO L226 Difference]: Without dead ends: 173 [2024-09-12 16:39:54,219 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 16:39:54,220 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 57 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:54,220 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 282 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 881 Invalid, 2 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 16:39:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-12 16:39:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2024-09-12 16:39:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 92 states have internal predecessors, (97), 27 states have call successors, (27), 21 states have call predecessors, (27), 24 states have return successors, (38), 28 states have call predecessors, (38), 23 states have call successors, (38) [2024-09-12 16:39:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 162 transitions. [2024-09-12 16:39:54,265 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 162 transitions. Word has length 114 [2024-09-12 16:39:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:54,266 INFO L474 AbstractCegarLoop]: Abstraction has 141 states and 162 transitions. [2024-09-12 16:39:54,266 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-12 16:39:54,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 162 transitions. [2024-09-12 16:39:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-09-12 16:39:54,267 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:54,267 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:54,281 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 16:39:54,468 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:54,468 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:54,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:54,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1625386709, now seen corresponding path program 4 times [2024-09-12 16:39:54,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:54,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154676676] [2024-09-12 16:39:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:54,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:54,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188263733] [2024-09-12 16:39:54,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:39:54,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:54,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:54,526 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) [2024-09-12 16:39:54,528 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 16:39:54,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:39:54,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:39:54,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 195 conjuncts are in the unsatisfiable core [2024-09-12 16:39:54,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:54,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-12 16:39:55,250 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 23 [2024-09-12 16:39:55,306 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 15 [2024-09-12 16:39:55,309 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 [2024-09-12 16:39:55,675 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 13 [2024-09-12 16:39:55,678 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 13 treesize of output 9 [2024-09-12 16:39:55,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2024-09-12 16:39:55,996 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 46 treesize of output 30 [2024-09-12 16:39:56,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-12 16:39:56,584 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 45 treesize of output 29 [2024-09-12 16:39:56,591 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 [2024-09-12 16:39:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-12 16:39:56,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:58,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:39:58,724 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 64 treesize of output 67 [2024-09-12 16:39:58,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:39:58,759 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 88 treesize of output 87 [2024-09-12 16:39:59,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154676676] [2024-09-12 16:39:59,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188263733] [2024-09-12 16:39:59,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188263733] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:59,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:59,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-09-12 16:39:59,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777561227] [2024-09-12 16:39:59,126 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:59,126 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-12 16:39:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-12 16:39:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 16:39:59,127 INFO L87 Difference]: Start difference. First operand 141 states and 162 transitions. Second operand has 29 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 25 states have internal predecessors, (52), 15 states have call successors, (25), 6 states have call predecessors, (25), 8 states have return successors, (22), 14 states have call predecessors, (22), 13 states have call successors, (22) [2024-09-12 16:40:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:40:01,282 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2024-09-12 16:40:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 16:40:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 25 states have internal predecessors, (52), 15 states have call successors, (25), 6 states have call predecessors, (25), 8 states have return successors, (22), 14 states have call predecessors, (22), 13 states have call successors, (22) Word has length 138 [2024-09-12 16:40:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:40:01,284 INFO L225 Difference]: With dead ends: 176 [2024-09-12 16:40:01,284 INFO L226 Difference]: Without dead ends: 172 [2024-09-12 16:40:01,285 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=278, Invalid=2374, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 16:40:01,286 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 50 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 35 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:40:01,286 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 441 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1184 Invalid, 4 Unknown, 0 Unchecked, 1.2s Time] [2024-09-12 16:40:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-12 16:40:01,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 134. [2024-09-12 16:40:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 89 states have internal predecessors, (94), 26 states have call successors, (26), 21 states have call predecessors, (26), 21 states have return successors, (29), 24 states have call predecessors, (29), 22 states have call successors, (29) [2024-09-12 16:40:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 149 transitions. [2024-09-12 16:40:01,340 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 149 transitions. Word has length 138 [2024-09-12 16:40:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:40:01,340 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 149 transitions. [2024-09-12 16:40:01,341 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 25 states have internal predecessors, (52), 15 states have call successors, (25), 6 states have call predecessors, (25), 8 states have return successors, (22), 14 states have call predecessors, (22), 13 states have call successors, (22) [2024-09-12 16:40:01,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:40:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 149 transitions. [2024-09-12 16:40:01,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-12 16:40:01,342 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:40:01,342 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 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] [2024-09-12 16:40:01,360 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 16:40:01,542 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:40:01,543 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:40:01,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:40:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1184517000, now seen corresponding path program 1 times [2024-09-12 16:40:01,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:40:01,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372674261] [2024-09-12 16:40:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:40:01,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:40:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:40:01,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301030530] [2024-09-12 16:40:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:40:01,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:40:01,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:40:01,591 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) [2024-09-12 16:40:01,593 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 16:40:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:01,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-09-12 16:40:01,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:40:01,815 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 [2024-09-12 16:40:01,818 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 [2024-09-12 16:40:01,826 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 [2024-09-12 16:40:01,835 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 [2024-09-12 16:40:01,845 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 [2024-09-12 16:40:01,848 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 [2024-09-12 16:40:02,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:40:02,649 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 [2024-09-12 16:40:02,665 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 [2024-09-12 16:40:03,264 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 [2024-09-12 16:40:03,271 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 [2024-09-12 16:40:03,354 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-12 16:40:03,354 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 [2024-09-12 16:40:03,383 INFO L349 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2024-09-12 16:40:03,383 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 30 treesize of output 45 [2024-09-12 16:40:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 48 proven. 29 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-09-12 16:40:03,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:40:09,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:40:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372674261] [2024-09-12 16:40:09,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:40:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301030530] [2024-09-12 16:40:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301030530] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:40:09,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:40:09,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-12 16:40:09,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643138074] [2024-09-12 16:40:09,870 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:40:09,870 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 16:40:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:40:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 16:40:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 16:40:09,871 INFO L87 Difference]: Start difference. First operand 134 states and 149 transitions. Second operand has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-12 16:40:11,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:40:11,500 INFO L93 Difference]: Finished difference Result 190 states and 221 transitions. [2024-09-12 16:40:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 16:40:11,501 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 77 [2024-09-12 16:40:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:40:11,502 INFO L225 Difference]: With dead ends: 190 [2024-09-12 16:40:11,502 INFO L226 Difference]: Without dead ends: 176 [2024-09-12 16:40:11,503 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 16:40:11,503 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 57 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 16:40:11,504 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 223 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 781 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 16:40:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-09-12 16:40:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2024-09-12 16:40:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 111 states have (on average 1.0990990990990992) internal successors, (122), 115 states have internal predecessors, (122), 33 states have call successors, (33), 26 states have call predecessors, (33), 28 states have return successors, (46), 32 states have call predecessors, (46), 29 states have call successors, (46) [2024-09-12 16:40:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 201 transitions. [2024-09-12 16:40:11,592 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 201 transitions. Word has length 77 [2024-09-12 16:40:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:40:11,593 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 201 transitions. [2024-09-12 16:40:11,593 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-12 16:40:11,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:40:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 201 transitions. [2024-09-12 16:40:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-12 16:40:11,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:40:11,595 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:40:11,609 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 16:40:11,795 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-12 16:40:11,795 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:40:11,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:40:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1910667427, now seen corresponding path program 2 times [2024-09-12 16:40:11,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:40:11,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273029813] [2024-09-12 16:40:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:40:11,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:40:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:40:11,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783412848] [2024-09-12 16:40:11,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:40:11,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:40:11,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:40:11,865 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) [2024-09-12 16:40:11,866 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 16:40:12,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:40:12,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:40:12,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 221 conjuncts are in the unsatisfiable core [2024-09-12 16:40:12,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:40:12,098 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 [2024-09-12 16:40:12,101 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 [2024-09-12 16:40:12,104 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 [2024-09-12 16:40:12,109 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 [2024-09-12 16:40:12,111 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 [2024-09-12 16:40:12,117 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 [2024-09-12 16:40:13,295 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 [2024-09-12 16:40:13,307 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 [2024-09-12 16:40:13,855 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 [2024-09-12 16:40:13,869 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 [2024-09-12 16:40:13,942 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-12 16:40:13,943 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 40 treesize of output 51 [2024-09-12 16:40:13,988 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-12 16:40:13,988 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 [2024-09-12 16:40:14,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:40:14,272 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 88 treesize of output 140 [2024-09-12 16:40:14,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:40:14,341 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 126 treesize of output 198 [2024-09-12 16:40:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 75 proven. 76 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-09-12 16:40:14,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:40:25,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:40:25,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273029813] [2024-09-12 16:40:25,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:40:25,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783412848] [2024-09-12 16:40:25,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783412848] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:40:25,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:40:25,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-12 16:40:25,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714150003] [2024-09-12 16:40:25,844 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:40:25,844 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 16:40:25,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:40:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 16:40:25,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 16:40:25,846 INFO L87 Difference]: Start difference. First operand 173 states and 201 transitions. Second operand has 23 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-12 16:40:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:40:28,416 INFO L93 Difference]: Finished difference Result 231 states and 274 transitions. [2024-09-12 16:40:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 16:40:28,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) Word has length 101 [2024-09-12 16:40:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:40:28,418 INFO L225 Difference]: With dead ends: 231 [2024-09-12 16:40:28,418 INFO L226 Difference]: Without dead ends: 229 [2024-09-12 16:40:28,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 89 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 16:40:28,419 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 78 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 34 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-12 16:40:28,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 323 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1114 Invalid, 2 Unknown, 0 Unchecked, 1.4s Time] [2024-09-12 16:40:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-09-12 16:40:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 214. [2024-09-12 16:40:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 137 states have (on average 1.1094890510948905) internal successors, (152), 143 states have internal predecessors, (152), 40 states have call successors, (40), 31 states have call predecessors, (40), 36 states have return successors, (64), 40 states have call predecessors, (64), 36 states have call successors, (64) [2024-09-12 16:40:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2024-09-12 16:40:28,521 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 256 transitions. Word has length 101 [2024-09-12 16:40:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:40:28,521 INFO L474 AbstractCegarLoop]: Abstraction has 214 states and 256 transitions. [2024-09-12 16:40:28,521 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-12 16:40:28,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:40:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 256 transitions. [2024-09-12 16:40:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-09-12 16:40:28,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:40:28,523 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:40:28,541 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 16:40:28,723 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 16:40:28,723 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:40:28,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:40:28,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1396227582, now seen corresponding path program 3 times [2024-09-12 16:40:28,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:40:28,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722215218] [2024-09-12 16:40:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:40:28,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:40:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:40:28,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531772093] [2024-09-12 16:40:28,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:40:28,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:40:28,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:40:28,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:40:28,788 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 16:40:29,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 16:40:29,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:40:29,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 271 conjuncts are in the unsatisfiable core [2024-09-12 16:40:29,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:40:29,189 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 [2024-09-12 16:40:29,194 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 [2024-09-12 16:40:29,197 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 [2024-09-12 16:40:29,205 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 [2024-09-12 16:40:29,210 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 [2024-09-12 16:40:29,218 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 [2024-09-12 16:40:30,682 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 [2024-09-12 16:40:30,691 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 [2024-09-12 16:40:31,451 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 [2024-09-12 16:40:31,470 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 [2024-09-12 16:40:31,593 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-12 16:40:31,593 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 40 treesize of output 43 [2024-09-12 16:40:31,623 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-12 16:40:31,623 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 [2024-09-12 16:40:31,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:40:31,826 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 72 treesize of output 88 [2024-09-12 16:40:31,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:40:31,848 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 98 treesize of output 86 [2024-09-12 16:40:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 117 proven. 106 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2024-09-12 16:40:31,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:40:40,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:40:40,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722215218] [2024-09-12 16:40:40,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:40:40,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531772093] [2024-09-12 16:40:40,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531772093] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:40:40,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:40:40,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-12 16:40:40,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005262647] [2024-09-12 16:40:40,010 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:40:40,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-12 16:40:40,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:40:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-12 16:40:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1278, Unknown=1, NotChecked=0, Total=1406 [2024-09-12 16:40:40,012 INFO L87 Difference]: Start difference. First operand 214 states and 256 transitions. Second operand has 26 states, 20 states have (on average 2.5) internal successors, (50), 22 states have internal predecessors, (50), 13 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-12 16:40:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:40:43,096 INFO L93 Difference]: Finished difference Result 272 states and 329 transitions. [2024-09-12 16:40:43,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 16:40:43,097 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 2.5) internal successors, (50), 22 states have internal predecessors, (50), 13 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) Word has length 125 [2024-09-12 16:40:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:40:43,099 INFO L225 Difference]: With dead ends: 272 [2024-09-12 16:40:43,099 INFO L226 Difference]: Without dead ends: 270 [2024-09-12 16:40:43,100 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=204, Invalid=2051, Unknown=1, NotChecked=0, Total=2256 [2024-09-12 16:40:43,100 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 62 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-12 16:40:43,101 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 373 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1149 Invalid, 1 Unknown, 0 Unchecked, 1.8s Time] [2024-09-12 16:40:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-09-12 16:40:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 216. [2024-09-12 16:40:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 138 states have (on average 1.108695652173913) internal successors, (153), 144 states have internal predecessors, (153), 40 states have call successors, (40), 31 states have call predecessors, (40), 37 states have return successors, (66), 41 states have call predecessors, (66), 36 states have call successors, (66) [2024-09-12 16:40:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2024-09-12 16:40:43,216 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 125 [2024-09-12 16:40:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:40:43,216 INFO L474 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2024-09-12 16:40:43,216 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 2.5) internal successors, (50), 22 states have internal predecessors, (50), 13 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-12 16:40:43,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:40:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2024-09-12 16:40:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-12 16:40:43,217 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:40:43,217 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 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] [2024-09-12 16:40:43,238 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 16:40:43,418 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 16:40:43,418 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:40:43,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:40:43,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1715931769, now seen corresponding path program 4 times [2024-09-12 16:40:43,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:40:43,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227005128] [2024-09-12 16:40:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:40:43,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:40:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:40:43,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992994450] [2024-09-12 16:40:43,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:40:43,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:40:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:40:43,479 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:40:43,480 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 16:40:43,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:40:43,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:40:43,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 176 conjuncts are in the unsatisfiable core [2024-09-12 16:40:43,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:40:43,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-12 16:40:43,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-12 16:40:56,827 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-12 16:40:56,828 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 53 treesize of output 60 [2024-09-12 16:40:56,883 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-12 16:40:56,884 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 55 treesize of output 62 [2024-09-12 16:40:57,017 INFO L349 Elim1Store]: treesize reduction 76, result has 29.0 percent of original size [2024-09-12 16:40:57,018 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 37 treesize of output 51 [2024-09-12 16:40:57,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:41:19,684 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 [2024-09-12 16:41:19,687 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 [2024-09-12 16:41:19,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-12 16:41:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 56 proven. 92 refuted. 1 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-12 16:41:24,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:41:27,323 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 242 treesize of output 214 [2024-09-12 16:41:28,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:41:28,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227005128] [2024-09-12 16:41:28,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:41:28,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992994450] [2024-09-12 16:41:28,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992994450] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:41:28,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:41:28,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-12 16:41:28,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019206120] [2024-09-12 16:41:28,417 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:41:28,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 16:41:28,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:41:28,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 16:41:28,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1122, Unknown=3, NotChecked=0, Total=1260 [2024-09-12 16:41:28,418 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand has 30 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 26 states have internal predecessors, (46), 12 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-12 16:41:33,390 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] [2024-09-12 16:41:43,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:42:08,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-12 16:42:13,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:42:17,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:42:21,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:42:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:42:21,129 INFO L93 Difference]: Finished difference Result 305 states and 358 transitions. [2024-09-12 16:42:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-12 16:42:21,131 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 26 states have internal predecessors, (46), 12 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 83 [2024-09-12 16:42:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:42:21,133 INFO L225 Difference]: With dead ends: 305 [2024-09-12 16:42:21,133 INFO L226 Difference]: Without dead ends: 303 [2024-09-12 16:42:21,137 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 60 SyntacticMatches, 14 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 63.7s TimeCoverageRelationStatistics Valid=571, Invalid=5117, Unknown=12, NotChecked=0, Total=5700 [2024-09-12 16:42:21,137 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 139 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 103 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:42:21,138 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 326 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1125 Invalid, 10 Unknown, 0 Unchecked, 23.2s Time] [2024-09-12 16:42:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2024-09-12 16:42:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 295. [2024-09-12 16:42:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 190 states have (on average 1.1157894736842104) internal successors, (212), 198 states have internal predecessors, (212), 54 states have call successors, (54), 42 states have call predecessors, (54), 50 states have return successors, (86), 55 states have call predecessors, (86), 48 states have call successors, (86) [2024-09-12 16:42:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 352 transitions. [2024-09-12 16:42:21,352 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 352 transitions. Word has length 83 [2024-09-12 16:42:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:42:21,353 INFO L474 AbstractCegarLoop]: Abstraction has 295 states and 352 transitions. [2024-09-12 16:42:21,353 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 26 states have internal predecessors, (46), 12 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-12 16:42:21,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:42:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 352 transitions. [2024-09-12 16:42:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-12 16:42:21,356 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:42:21,356 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 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] [2024-09-12 16:42:21,374 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-12 16:42:21,557 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 16:42:21,557 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:42:21,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:42:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1567918277, now seen corresponding path program 1 times [2024-09-12 16:42:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:42:21,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848654239] [2024-09-12 16:42:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:42:21,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:42:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:22,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:42:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:22,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:42:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:22,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:42:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:22,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:42:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:22,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:42:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:22,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 16:42:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:23,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:42:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:23,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:42:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:23,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:42:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:23,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 16:42:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:23,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 16:42:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:23,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 16:42:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-12 16:42:23,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:42:23,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848654239] [2024-09-12 16:42:23,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848654239] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:42:23,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056271549] [2024-09-12 16:42:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:42:23,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:42:23,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:42:23,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:42:23,154 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 16:42:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:42:23,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-12 16:42:23,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:42:23,391 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 [2024-09-12 16:42:23,397 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 [2024-09-12 16:42:23,401 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 [2024-09-12 16:42:43,725 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_main_~#A~0.base_BEFORE_CALL_16| Int) (|v_main_~#A~0.offset_BEFORE_CALL_16| Int) (|v_main_~#r~0.offset_BEFORE_CALL_16| Int) (|v_main_~#r~0.base_BEFORE_CALL_16| Int)) (= (select (select |c_#memory_int#6| |v_main_~#A~0.base_BEFORE_CALL_16|) |v_main_~#A~0.offset_BEFORE_CALL_16|) (select (select |c_#memory_int#4| |v_main_~#r~0.base_BEFORE_CALL_16|) |v_main_~#r~0.offset_BEFORE_CALL_16|))) is different from true [2024-09-12 16:42:47,996 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10 Int) (|v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_3| Int)) (<= (select (select |c_#memory_int#4| |v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_14|) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10) (select (select |c_#memory_int#6| |v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_11|) |v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_3|))) (exists ((|v_main_~#A~0.base_BEFORE_CALL_16| Int) (|v_main_~#A~0.offset_BEFORE_CALL_16| Int) (|v_main_~#r~0.offset_BEFORE_CALL_16| Int) (|v_main_~#r~0.base_BEFORE_CALL_16| Int)) (= (select (select |c_#memory_int#6| |v_main_~#A~0.base_BEFORE_CALL_16|) |v_main_~#A~0.offset_BEFORE_CALL_16|) (select (select |c_#memory_int#4| |v_main_~#r~0.base_BEFORE_CALL_16|) |v_main_~#r~0.offset_BEFORE_CALL_16|)))) is different from true [2024-09-12 16:42:48,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:42:56,414 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 36 treesize of output 20 [2024-09-12 16:42:56,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:42:56,436 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 34 treesize of output 34 [2024-09-12 16:43:05,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2024-09-12 16:43:05,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:43:05,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2024-09-12 16:43:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 53 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 74 not checked. [2024-09-12 16:43:05,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:43:06,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056271549] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:43:06,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:43:06,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2024-09-12 16:43:06,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813856661] [2024-09-12 16:43:06,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:43:06,344 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 16:43:06,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:43:06,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 16:43:06,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1031, Unknown=7, NotChecked=130, Total=1260 [2024-09-12 16:43:06,346 INFO L87 Difference]: Start difference. First operand 295 states and 352 transitions. Second operand has 32 states, 25 states have (on average 2.64) internal successors, (66), 27 states have internal predecessors, (66), 17 states have call successors, (28), 9 states have call predecessors, (28), 10 states have return successors, (23), 13 states have call predecessors, (23), 15 states have call successors, (23) [2024-09-12 16:43:10,364 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] [2024-09-12 16:43:14,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:43:18,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:43:22,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:43:31,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:43:36,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:43:53,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:43:57,396 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]