./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.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 fab3df42fb7f885fd39a281a051af0420a7d494ced4f3c2e06236facb6a7ec78 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 19:23:50,998 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:23:51,069 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:23:51,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:23:51,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:23:51,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:23:51,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:23:51,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:23:51,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:23:51,106 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:23:51,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:23:51,107 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:23:51,108 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:23:51,108 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:23:51,109 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:23:51,109 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:23:51,109 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:23:51,110 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:23:51,110 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:23:51,111 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:23:51,111 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:23:51,111 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:23:51,112 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:23:51,112 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:23:51,113 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:23:51,113 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:23:51,113 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:23:51,113 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:23:51,114 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:23:51,114 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:23:51,114 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:23:51,114 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:23:51,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:23:51,115 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:23:51,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:23:51,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:23:51,116 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:23:51,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:23:51,116 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:23:51,117 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:23:51,117 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:23:51,118 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:23:51,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab3df42fb7f885fd39a281a051af0420a7d494ced4f3c2e06236facb6a7ec78 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 19:23:51,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:23:51,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:23:51,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:23:51,408 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:23:51,409 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:23:51,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c [2024-09-17 19:23:52,803 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:23:52,968 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:23:52,968 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c [2024-09-17 19:23:52,975 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4d5da39f2/cffe4e3449614813aada760a517f6ee1/FLAGe8fde7a7e [2024-09-17 19:23:53,368 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4d5da39f2/cffe4e3449614813aada760a517f6ee1 [2024-09-17 19:23:53,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:23:53,373 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 19:23:53,375 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:23:53,375 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:23:53,380 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:23:53,381 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,382 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac1d715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53, skipping insertion in model container [2024-09-17 19:23:53,382 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,400 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:23:53,572 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1474,1487] [2024-09-17 19:23:53,578 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1547,1560] [2024-09-17 19:23:53,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:23:53,598 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 19:23:53,618 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1474,1487] [2024-09-17 19:23:53,620 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1547,1560] [2024-09-17 19:23:53,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:23:53,646 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:23:53,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53 WrapperNode [2024-09-17 19:23:53,647 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:23:53,648 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:23:53,648 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:23:53,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:23:53,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,664 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,670 INFO L138 Inliner]: procedures = 13, calls = 46, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 19:23:53,670 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:23:53,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:23:53,671 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:23:53,671 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:23:53,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,690 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,723 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 5, 4, 4, 3]. 28 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 3 writes are split as follows [0, 1, 1, 1, 0]. [2024-09-17 19:23:53,724 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,724 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,732 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,746 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:23:53,753 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:23:53,753 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:23:53,753 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:23:53,754 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (1/1) ... [2024-09-17 19:23:53,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:23:53,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:23:53,796 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) [2024-09-17 19:23:53,804 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 [2024-09-17 19:23:53,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:23:53,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 19:23:53,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 19:23:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 19:23:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-17 19:23:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-17 19:23:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-17 19:23:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-17 19:23:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-17 19:23:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-17 19:23:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-17 19:23:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-17 19:23:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-17 19:23:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-17 19:23:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 19:23:53,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 19:23:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:23:53,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:23:53,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-17 19:23:53,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-17 19:23:53,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-17 19:23:53,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-17 19:23:53,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-17 19:23:53,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-17 19:23:53,853 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_15_0 [2024-09-17 19:23:53,853 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_15_0 [2024-09-17 19:23:53,968 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:23:53,975 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:23:54,166 INFO L? ?]: Removed 3 outVars from TransFormulas that were not future-live. [2024-09-17 19:23:54,167 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:23:54,194 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:23:54,199 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-17 19:23:54,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:23:54 BoogieIcfgContainer [2024-09-17 19:23:54,199 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:23:54,201 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:23:54,201 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:23:54,206 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:23:54,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:23:53" (1/3) ... [2024-09-17 19:23:54,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c054df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:23:54, skipping insertion in model container [2024-09-17 19:23:54,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:53" (2/3) ... [2024-09-17 19:23:54,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c054df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:23:54, skipping insertion in model container [2024-09-17 19:23:54,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:23:54" (3/3) ... [2024-09-17 19:23:54,216 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_linear-inequality-inv-a.c [2024-09-17 19:23:54,234 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:23:54,234 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-17 19:23:54,302 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:23:54,308 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;@1c0d254a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:23:54,308 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-17 19:23:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 19:23:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-17 19:23:54,318 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:23:54,319 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:23:54,319 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:23:54,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash -211352663, now seen corresponding path program 1 times [2024-09-17 19:23:54,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:23:54,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317830375] [2024-09-17 19:23:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:54,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:23:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:54,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:23:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:54,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:23:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:23:55,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:23:55,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317830375] [2024-09-17 19:23:55,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317830375] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:23:55,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:23:55,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 19:23:55,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363722190] [2024-09-17 19:23:55,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:23:55,059 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 19:23:55,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:23:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 19:23:55,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-17 19:23:55,090 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 19:23:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:23:55,249 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2024-09-17 19:23:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:23:55,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2024-09-17 19:23:55,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:23:55,260 INFO L225 Difference]: With dead ends: 38 [2024-09-17 19:23:55,261 INFO L226 Difference]: Without dead ends: 26 [2024-09-17 19:23:55,264 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-17 19:23:55,268 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:23:55,269 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 63 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:23:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-17 19:23:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-09-17 19:23:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 19:23:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-09-17 19:23:55,303 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2024-09-17 19:23:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:23:55,305 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-09-17 19:23:55,305 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 19:23:55,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-09-17 19:23:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-17 19:23:55,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:23:55,309 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:23:55,309 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:23:55,309 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:23:55,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2038005093, now seen corresponding path program 1 times [2024-09-17 19:23:55,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:23:55,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845761261] [2024-09-17 19:23:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:55,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:23:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:55,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:23:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:55,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:23:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:23:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:23:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845761261] [2024-09-17 19:23:55,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845761261] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:23:55,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:23:55,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-17 19:23:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545258374] [2024-09-17 19:23:55,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:23:55,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 19:23:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:23:55,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 19:23:55,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 19:23:55,612 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 19:23:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:23:55,746 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2024-09-17 19:23:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 19:23:55,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-09-17 19:23:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:23:55,748 INFO L225 Difference]: With dead ends: 26 [2024-09-17 19:23:55,748 INFO L226 Difference]: Without dead ends: 21 [2024-09-17 19:23:55,749 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-17 19:23:55,750 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:23:55,751 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:23:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-17 19:23:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-17 19:23:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-17 19:23:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-17 19:23:55,760 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2024-09-17 19:23:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:23:55,761 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-17 19:23:55,762 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 19:23:55,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-17 19:23:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-17 19:23:55,764 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:23:55,764 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:23:55,764 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 19:23:55,765 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:23:55,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:55,766 INFO L85 PathProgramCache]: Analyzing trace with hash -907560216, now seen corresponding path program 1 times [2024-09-17 19:23:55,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:23:55,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123957715] [2024-09-17 19:23:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:55,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:23:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:56,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:23:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:56,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:23:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:56,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:23:56,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:23:56,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123957715] [2024-09-17 19:23:56,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123957715] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:23:56,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697465880] [2024-09-17 19:23:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:56,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:23:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:23:56,527 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) [2024-09-17 19:23:56,529 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:23:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:56,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-17 19:23:56,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:23:56,786 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 [2024-09-17 19:23:56,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-17 19:23:56,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-17 19:23:56,897 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 [2024-09-17 19:23:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:23:56,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:23:57,351 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 9 treesize of output 5 [2024-09-17 19:24:01,576 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 76 treesize of output 72 [2024-09-17 19:24:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:24:02,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697465880] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:24:02,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:24:02,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-09-17 19:24:02,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286147695] [2024-09-17 19:24:02,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:02,432 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 19:24:02,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:02,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 19:24:02,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-09-17 19:24:02,433 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:24:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:03,029 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-17 19:24:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 19:24:03,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 19 [2024-09-17 19:24:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:03,031 INFO L225 Difference]: With dead ends: 34 [2024-09-17 19:24:03,031 INFO L226 Difference]: Without dead ends: 30 [2024-09-17 19:24:03,032 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2024-09-17 19:24:03,033 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:03,033 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 85 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:24:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-17 19:24:03,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-09-17 19:24:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-17 19:24:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-09-17 19:24:03,048 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2024-09-17 19:24:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:03,049 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-09-17 19:24:03,049 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:24:03,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-09-17 19:24:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-17 19:24:03,050 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:03,051 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:03,067 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 19:24:03,251 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 [2024-09-17 19:24:03,252 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:03,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:03,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1930407430, now seen corresponding path program 1 times [2024-09-17 19:24:03,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:03,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499207620] [2024-09-17 19:24:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:03,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:03,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:03,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:03,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:24:03,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:03,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499207620] [2024-09-17 19:24:03,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499207620] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:03,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83037501] [2024-09-17 19:24:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:03,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:03,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:03,690 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) [2024-09-17 19:24:03,692 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:24:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:03,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-17 19:24:03,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:03,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:03,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:03,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-17 19:24:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:24:03,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:03,976 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 [2024-09-17 19:24:04,090 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 9 treesize of output 5 [2024-09-17 19:24:04,174 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 25 [2024-09-17 19:24:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:24:04,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83037501] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:24:04,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:24:04,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2024-09-17 19:24:04,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105127273] [2024-09-17 19:24:04,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:04,303 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 19:24:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 19:24:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-09-17 19:24:04,305 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:24:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:04,688 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-09-17 19:24:04,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 19:24:04,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 20 [2024-09-17 19:24:04,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:04,690 INFO L225 Difference]: With dead ends: 30 [2024-09-17 19:24:04,690 INFO L226 Difference]: Without dead ends: 25 [2024-09-17 19:24:04,691 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:24:04,691 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:04,692 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 83 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:24:04,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-17 19:24:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-17 19:24:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 19:24:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-09-17 19:24:04,697 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2024-09-17 19:24:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:04,698 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-09-17 19:24:04,698 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:24:04,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-09-17 19:24:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-17 19:24:04,699 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:04,699 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:04,715 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 19:24:04,903 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 [2024-09-17 19:24:04,904 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:04,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1429057543, now seen corresponding path program 2 times [2024-09-17 19:24:04,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:04,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921980357] [2024-09-17 19:24:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:04,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:05,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:05,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:05,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:06,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 19:24:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:06,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921980357] [2024-09-17 19:24:06,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921980357] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129114333] [2024-09-17 19:24:06,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:24:06,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:06,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:06,081 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) [2024-09-17 19:24:06,083 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:24:06,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:24:06,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:24:06,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-17 19:24:06,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:06,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:06,301 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 [2024-09-17 19:24:06,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:06,452 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 36 treesize of output 24 [2024-09-17 19:24:06,455 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 28 treesize of output 16 [2024-09-17 19:24:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:24:06,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:06,849 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 81 treesize of output 65 [2024-09-17 19:24:07,263 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 76 treesize of output 72 [2024-09-17 19:24:07,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129114333] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:07,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:07,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-09-17 19:24:07,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709145252] [2024-09-17 19:24:07,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:07,622 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 19:24:07,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 19:24:07,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-09-17 19:24:07,623 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:24:07,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:07,975 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2024-09-17 19:24:07,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 19:24:07,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 24 [2024-09-17 19:24:07,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:07,976 INFO L225 Difference]: With dead ends: 31 [2024-09-17 19:24:07,976 INFO L226 Difference]: Without dead ends: 29 [2024-09-17 19:24:07,977 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2024-09-17 19:24:07,977 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:07,978 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 117 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:24:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-17 19:24:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-17 19:24:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-17 19:24:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-09-17 19:24:07,990 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2024-09-17 19:24:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:07,990 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-09-17 19:24:07,990 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:24:07,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-09-17 19:24:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-17 19:24:07,991 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:07,991 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:08,010 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 19:24:08,192 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 [2024-09-17 19:24:08,192 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:08,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1351107819, now seen corresponding path program 2 times [2024-09-17 19:24:08,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:08,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883249367] [2024-09-17 19:24:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:08,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:08,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:08,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:08,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:08,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 19:24:08,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:08,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883249367] [2024-09-17 19:24:08,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883249367] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:08,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038839792] [2024-09-17 19:24:08,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:24:08,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:08,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:08,985 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) [2024-09-17 19:24:08,986 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:24:09,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:24:09,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:24:09,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-17 19:24:09,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:09,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:09,250 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 [2024-09-17 19:24:09,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:09,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-17 19:24:09,420 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 22 treesize of output 10 [2024-09-17 19:24:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:24:09,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:09,763 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 59 treesize of output 47 [2024-09-17 19:24:10,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038839792] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:10,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:10,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2024-09-17 19:24:10,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043266190] [2024-09-17 19:24:10,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:10,053 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 19:24:10,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 19:24:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:24:10,055 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:24:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:10,296 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2024-09-17 19:24:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-17 19:24:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 25 [2024-09-17 19:24:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:10,298 INFO L225 Difference]: With dead ends: 32 [2024-09-17 19:24:10,298 INFO L226 Difference]: Without dead ends: 27 [2024-09-17 19:24:10,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 19:24:10,300 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:10,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 72 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:24:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-17 19:24:10,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-17 19:24:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-17 19:24:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-17 19:24:10,305 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2024-09-17 19:24:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:10,306 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-17 19:24:10,306 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:24:10,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-17 19:24:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-17 19:24:10,307 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:10,307 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:10,323 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 19:24:10,507 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 [2024-09-17 19:24:10,508 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:10,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash 450584184, now seen corresponding path program 3 times [2024-09-17 19:24:10,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:10,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339362196] [2024-09-17 19:24:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:10,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:11,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:11,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:11,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:11,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:12,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 19:24:12,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:12,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339362196] [2024-09-17 19:24:12,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339362196] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:12,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005360793] [2024-09-17 19:24:12,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:24:12,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:12,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:12,098 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) [2024-09-17 19:24:12,100 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:24:12,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 19:24:12,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:24:12,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-17 19:24:12,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:12,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:12,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:12,414 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 [2024-09-17 19:24:12,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:12,663 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 36 treesize of output 24 [2024-09-17 19:24:12,665 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 28 treesize of output 16 [2024-09-17 19:24:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 19:24:12,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:13,256 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 109 treesize of output 93 [2024-09-17 19:24:13,262 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 93 treesize of output 77 [2024-09-17 19:24:13,837 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 52 treesize of output 48 [2024-09-17 19:24:13,843 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 78 treesize of output 74 [2024-09-17 19:24:14,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005360793] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:14,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:14,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2024-09-17 19:24:14,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496913750] [2024-09-17 19:24:14,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:14,105 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 19:24:14,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 19:24:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2024-09-17 19:24:14,108 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 24 states, 17 states have (on average 1.588235294117647) internal successors, (27), 20 states have internal predecessors, (27), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-17 19:24:14,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:14,370 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2024-09-17 19:24:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-17 19:24:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 1.588235294117647) internal successors, (27), 20 states have internal predecessors, (27), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 29 [2024-09-17 19:24:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:14,371 INFO L225 Difference]: With dead ends: 33 [2024-09-17 19:24:14,371 INFO L226 Difference]: Without dead ends: 31 [2024-09-17 19:24:14,372 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 19:24:14,373 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:14,373 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:24:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-17 19:24:14,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-17 19:24:14,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 19:24:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-09-17 19:24:14,380 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 29 [2024-09-17 19:24:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:14,381 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-09-17 19:24:14,381 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 1.588235294117647) internal successors, (27), 20 states have internal predecessors, (27), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-17 19:24:14,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-09-17 19:24:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-17 19:24:14,382 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:14,382 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:14,396 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 19:24:14,586 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-17 19:24:14,587 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:14,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:14,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1083210870, now seen corresponding path program 3 times [2024-09-17 19:24:14,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:14,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872135012] [2024-09-17 19:24:14,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:14,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:14,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:15,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:15,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:15,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:15,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-17 19:24:15,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872135012] [2024-09-17 19:24:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872135012] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157460374] [2024-09-17 19:24:15,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:24:15,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:15,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:15,745 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) [2024-09-17 19:24:15,746 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:24:15,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 19:24:15,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:24:15,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-17 19:24:15,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:15,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:15,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:16,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:16,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:16,170 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 22 treesize of output 10 [2024-09-17 19:24:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-17 19:24:16,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:16,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-17 19:24:16,409 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 80 treesize of output 68 [2024-09-17 19:24:16,414 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 68 treesize of output 56 [2024-09-17 19:24:16,734 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 36 treesize of output 32 [2024-09-17 19:24:16,742 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 30 treesize of output 26 [2024-09-17 19:24:16,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157460374] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:16,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:16,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2024-09-17 19:24:16,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862785232] [2024-09-17 19:24:16,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:16,818 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 19:24:16,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:16,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 19:24:16,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:24:16,820 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 21 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-17 19:24:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:17,035 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-17 19:24:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 19:24:17,036 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 30 [2024-09-17 19:24:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:17,037 INFO L225 Difference]: With dead ends: 34 [2024-09-17 19:24:17,037 INFO L226 Difference]: Without dead ends: 29 [2024-09-17 19:24:17,037 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2024-09-17 19:24:17,038 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:17,038 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 92 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:24:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-17 19:24:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-17 19:24:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-17 19:24:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-09-17 19:24:17,044 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 30 [2024-09-17 19:24:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:17,044 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-09-17 19:24:17,044 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-17 19:24:17,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-09-17 19:24:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-17 19:24:17,045 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:17,045 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:17,062 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 19:24:17,246 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:17,246 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:17,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:17,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2115644489, now seen corresponding path program 4 times [2024-09-17 19:24:17,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:17,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38323921] [2024-09-17 19:24:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:17,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:17,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:17,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:18,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:19,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:19,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:19,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-17 19:24:19,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:19,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38323921] [2024-09-17 19:24:19,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38323921] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:19,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699092093] [2024-09-17 19:24:19,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:24:19,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:19,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:19,533 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) [2024-09-17 19:24:19,534 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 19:24:19,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:24:19,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:24:19,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-17 19:24:19,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:19,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:19,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:19,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:19,924 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 [2024-09-17 19:24:20,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:20,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2024-09-17 19:24:20,187 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 28 treesize of output 16 [2024-09-17 19:24:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 19:24:20,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:20,761 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 137 treesize of output 121 [2024-09-17 19:24:20,766 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 121 treesize of output 105 [2024-09-17 19:24:20,771 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 105 treesize of output 89 [2024-09-17 19:24:21,502 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 59 treesize of output 55 [2024-09-17 19:24:21,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2024-09-17 19:24:21,513 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 80 treesize of output 76 [2024-09-17 19:24:21,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699092093] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:21,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:21,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2024-09-17 19:24:21,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882548097] [2024-09-17 19:24:21,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:21,934 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 19:24:21,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:21,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 19:24:21,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2024-09-17 19:24:21,936 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-17 19:24:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:22,207 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2024-09-17 19:24:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 19:24:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2024-09-17 19:24:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:22,209 INFO L225 Difference]: With dead ends: 35 [2024-09-17 19:24:22,209 INFO L226 Difference]: Without dead ends: 33 [2024-09-17 19:24:22,210 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 19:24:22,210 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:22,211 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 132 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:24:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-17 19:24:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-17 19:24:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-17 19:24:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-09-17 19:24:22,218 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2024-09-17 19:24:22,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:22,218 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-09-17 19:24:22,218 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-17 19:24:22,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-09-17 19:24:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-17 19:24:22,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:22,220 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:22,239 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-17 19:24:22,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:22,421 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:22,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1160472773, now seen corresponding path program 4 times [2024-09-17 19:24:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955078173] [2024-09-17 19:24:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:22,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:22,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:22,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:23,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:23,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:23,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-17 19:24:24,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:24,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955078173] [2024-09-17 19:24:24,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955078173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:24,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791192111] [2024-09-17 19:24:24,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:24:24,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:24,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:24,104 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) [2024-09-17 19:24:24,107 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 19:24:24,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:24:24,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:24:24,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-09-17 19:24:24,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:24,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:24,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:24,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:24,631 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 [2024-09-17 19:24:24,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:24,905 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 [2024-09-17 19:24:24,929 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 22 treesize of output 10 [2024-09-17 19:24:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-17 19:24:24,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:25,811 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 101 treesize of output 89 [2024-09-17 19:24:25,820 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 89 treesize of output 77 [2024-09-17 19:24:25,838 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 71 treesize of output 59 [2024-09-17 19:24:26,716 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 37 treesize of output 33 [2024-09-17 19:24:26,721 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 31 treesize of output 27 [2024-09-17 19:24:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791192111] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:26,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:26,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2024-09-17 19:24:26,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16014017] [2024-09-17 19:24:26,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:26,787 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-17 19:24:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:26,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-17 19:24:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 19:24:26,788 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-17 19:24:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:27,075 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-09-17 19:24:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 19:24:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) Word has length 35 [2024-09-17 19:24:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:27,076 INFO L225 Difference]: With dead ends: 36 [2024-09-17 19:24:27,076 INFO L226 Difference]: Without dead ends: 31 [2024-09-17 19:24:27,077 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1394, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 19:24:27,078 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:27,078 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 102 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:24:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-17 19:24:27,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-17 19:24:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 19:24:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2024-09-17 19:24:27,090 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 35 [2024-09-17 19:24:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:27,090 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2024-09-17 19:24:27,090 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-17 19:24:27,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:27,091 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2024-09-17 19:24:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-17 19:24:27,093 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:27,093 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:27,111 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-17 19:24:27,294 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:27,294 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:27,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash 964329992, now seen corresponding path program 5 times [2024-09-17 19:24:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:27,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832308240] [2024-09-17 19:24:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:27,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:28,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:28,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:28,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:29,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:29,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:29,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:30,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 19:24:30,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:30,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832308240] [2024-09-17 19:24:30,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832308240] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:30,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17180047] [2024-09-17 19:24:30,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:24:30,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:30,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:30,156 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) [2024-09-17 19:24:30,157 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 19:24:30,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-17 19:24:30,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:24:30,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-09-17 19:24:30,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:30,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:30,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:30,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:30,684 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 23 treesize of output 19 [2024-09-17 19:24:30,707 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 [2024-09-17 19:24:30,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:30,986 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 36 treesize of output 24 [2024-09-17 19:24:30,988 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 28 treesize of output 16 [2024-09-17 19:24:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-17 19:24:31,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:31,778 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 165 treesize of output 149 [2024-09-17 19:24:31,782 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 149 treesize of output 133 [2024-09-17 19:24:31,785 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 133 treesize of output 117 [2024-09-17 19:24:31,788 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 117 treesize of output 101 [2024-09-17 19:24:32,665 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 66 treesize of output 62 [2024-09-17 19:24:32,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-09-17 19:24:32,678 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 54 treesize of output 50 [2024-09-17 19:24:32,686 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 82 treesize of output 78 [2024-09-17 19:24:33,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17180047] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:33,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:33,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2024-09-17 19:24:33,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996518594] [2024-09-17 19:24:33,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:33,402 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-17 19:24:33,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:33,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-17 19:24:33,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2024-09-17 19:24:33,403 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 24 states have internal predecessors, (32), 8 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-17 19:24:33,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:33,814 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2024-09-17 19:24:33,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 19:24:33,815 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 24 states have internal predecessors, (32), 8 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) Word has length 39 [2024-09-17 19:24:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:33,816 INFO L225 Difference]: With dead ends: 37 [2024-09-17 19:24:33,816 INFO L226 Difference]: Without dead ends: 35 [2024-09-17 19:24:33,816 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 19:24:33,817 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:33,817 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 130 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 19:24:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-17 19:24:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-17 19:24:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 8 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-17 19:24:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2024-09-17 19:24:33,824 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 39 [2024-09-17 19:24:33,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:33,825 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2024-09-17 19:24:33,825 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 24 states have internal predecessors, (32), 8 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-17 19:24:33,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2024-09-17 19:24:33,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-17 19:24:33,826 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:33,826 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:33,840 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-17 19:24:34,026 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-17 19:24:34,027 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:34,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:34,027 INFO L85 PathProgramCache]: Analyzing trace with hash -170538266, now seen corresponding path program 5 times [2024-09-17 19:24:34,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:34,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572693617] [2024-09-17 19:24:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:34,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:34,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:34,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:35,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:35,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:35,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:35,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:35,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-17 19:24:35,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:35,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572693617] [2024-09-17 19:24:35,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572693617] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:35,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875296943] [2024-09-17 19:24:35,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:24:35,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:35,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:35,884 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) [2024-09-17 19:24:35,886 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 19:24:36,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-17 19:24:36,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:24:36,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-17 19:24:36,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:36,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:36,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:36,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:36,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:36,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:36,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:36,515 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 22 treesize of output 10 [2024-09-17 19:24:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-17 19:24:36,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:36,951 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 41 [2024-09-17 19:24:36,957 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 122 treesize of output 110 [2024-09-17 19:24:36,975 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 412 treesize of output 364 [2024-09-17 19:24:36,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 364 treesize of output 316 [2024-09-17 19:24:36,989 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 316 treesize of output 268 [2024-09-17 19:24:38,063 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 50 treesize of output 46 [2024-09-17 19:24:38,067 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 44 treesize of output 40 [2024-09-17 19:24:38,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-09-17 19:24:38,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-09-17 19:24:38,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875296943] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:38,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:38,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 26 [2024-09-17 19:24:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264955825] [2024-09-17 19:24:38,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:38,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-17 19:24:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-17 19:24:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2024-09-17 19:24:38,148 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 24 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-17 19:24:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:38,305 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2024-09-17 19:24:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 19:24:38,306 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 24 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 7 states have call successors, (13) Word has length 40 [2024-09-17 19:24:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:38,306 INFO L225 Difference]: With dead ends: 38 [2024-09-17 19:24:38,306 INFO L226 Difference]: Without dead ends: 33 [2024-09-17 19:24:38,307 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 19:24:38,307 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:38,308 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:24:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-17 19:24:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-17 19:24:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-17 19:24:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-17 19:24:38,315 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 40 [2024-09-17 19:24:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:38,315 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-17 19:24:38,316 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 24 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-17 19:24:38,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-17 19:24:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-17 19:24:38,317 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:38,317 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:38,335 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-17 19:24:38,517 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-17 19:24:38,518 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:38,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:38,518 INFO L85 PathProgramCache]: Analyzing trace with hash 365992089, now seen corresponding path program 6 times [2024-09-17 19:24:38,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:38,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907766332] [2024-09-17 19:24:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:38,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:39,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:39,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:40,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:40,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:40,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:41,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:41,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:41,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-17 19:24:41,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:41,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907766332] [2024-09-17 19:24:41,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907766332] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:41,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83815576] [2024-09-17 19:24:41,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:24:41,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:41,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:41,679 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) [2024-09-17 19:24:41,680 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 19:24:41,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-17 19:24:41,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:24:41,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-09-17 19:24:41,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:42,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:42,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:42,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:42,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:42,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:42,249 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 [2024-09-17 19:24:42,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:42,629 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 36 treesize of output 24 [2024-09-17 19:24:42,634 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 28 treesize of output 16 [2024-09-17 19:24:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-17 19:24:42,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:43,641 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 193 treesize of output 177 [2024-09-17 19:24:43,644 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 177 treesize of output 161 [2024-09-17 19:24:43,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 145 [2024-09-17 19:24:43,650 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 145 treesize of output 129 [2024-09-17 19:24:43,654 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 129 treesize of output 113 [2024-09-17 19:24:44,905 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 73 treesize of output 69 [2024-09-17 19:24:44,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2024-09-17 19:24:44,924 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 61 treesize of output 57 [2024-09-17 19:24:44,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-09-17 19:24:44,945 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 84 treesize of output 80 [2024-09-17 19:24:45,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83815576] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:45,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:45,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2024-09-17 19:24:45,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485565797] [2024-09-17 19:24:45,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:45,427 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 19:24:45,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:45,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 19:24:45,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 19:24:45,429 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 30 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 8 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-17 19:24:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:45,707 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2024-09-17 19:24:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 19:24:45,707 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 8 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) Word has length 44 [2024-09-17 19:24:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:45,708 INFO L225 Difference]: With dead ends: 39 [2024-09-17 19:24:45,708 INFO L226 Difference]: Without dead ends: 37 [2024-09-17 19:24:45,709 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 19:24:45,709 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:45,710 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 115 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:24:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-17 19:24:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-17 19:24:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 9 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-17 19:24:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-09-17 19:24:45,717 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 44 [2024-09-17 19:24:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:45,719 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-09-17 19:24:45,719 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 8 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-17 19:24:45,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-09-17 19:24:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-17 19:24:45,720 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:45,720 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:45,735 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-17 19:24:45,920 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:45,921 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:45,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:45,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1539144075, now seen corresponding path program 6 times [2024-09-17 19:24:45,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:45,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510567285] [2024-09-17 19:24:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:45,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:46,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:46,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:46,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:47,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:47,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:47,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:47,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:47,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-17 19:24:47,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:47,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510567285] [2024-09-17 19:24:47,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510567285] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:47,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846431941] [2024-09-17 19:24:47,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:24:47,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:47,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:47,918 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) [2024-09-17 19:24:47,919 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 19:24:48,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-17 19:24:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:24:48,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-09-17 19:24:48,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:48,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:48,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:48,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:48,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:48,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:48,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:48,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:48,741 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 22 treesize of output 10 [2024-09-17 19:24:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-17 19:24:48,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:49,398 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 52 treesize of output 48 [2024-09-17 19:24:49,406 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 143 treesize of output 131 [2024-09-17 19:24:49,426 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 496 treesize of output 448 [2024-09-17 19:24:49,432 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 448 treesize of output 400 [2024-09-17 19:24:49,440 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 400 treesize of output 352 [2024-09-17 19:24:49,449 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 352 treesize of output 304 [2024-09-17 19:24:51,089 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 57 treesize of output 53 [2024-09-17 19:24:51,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-09-17 19:24:51,104 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 41 [2024-09-17 19:24:51,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-09-17 19:24:51,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-09-17 19:24:51,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846431941] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:51,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:51,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 30 [2024-09-17 19:24:51,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025666614] [2024-09-17 19:24:51,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:51,216 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 19:24:51,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 19:24:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 19:24:51,217 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 30 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 28 states have internal predecessors, (37), 8 states have call successors, (9), 3 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-17 19:24:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:51,408 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-17 19:24:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 19:24:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 28 states have internal predecessors, (37), 8 states have call successors, (9), 3 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) Word has length 45 [2024-09-17 19:24:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:51,409 INFO L225 Difference]: With dead ends: 40 [2024-09-17 19:24:51,410 INFO L226 Difference]: Without dead ends: 35 [2024-09-17 19:24:51,410 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=358, Invalid=1202, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 19:24:51,411 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:51,411 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:24:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-17 19:24:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-17 19:24:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-17 19:24:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-09-17 19:24:51,419 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2024-09-17 19:24:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:51,419 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-09-17 19:24:51,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 28 states have internal predecessors, (37), 8 states have call successors, (9), 3 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-17 19:24:51,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-09-17 19:24:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-17 19:24:51,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:51,420 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:51,439 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-17 19:24:51,621 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-17 19:24:51,621 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:51,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:51,622 INFO L85 PathProgramCache]: Analyzing trace with hash 585835928, now seen corresponding path program 7 times [2024-09-17 19:24:51,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:51,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438198728] [2024-09-17 19:24:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:51,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:52,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:52,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:24:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:53,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:53,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:54,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:54,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:54,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:55,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:55,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 17 proven. 63 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-17 19:24:55,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:55,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438198728] [2024-09-17 19:24:55,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438198728] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:55,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984895426] [2024-09-17 19:24:55,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 19:24:55,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:55,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:55,280 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) [2024-09-17 19:24:55,281 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 19:24:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:55,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 167 conjuncts are in the unsatisfiable core [2024-09-17 19:24:55,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:55,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:55,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:55,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:55,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:55,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:55,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:24:55,790 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 [2024-09-17 19:24:56,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:24:56,116 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 36 treesize of output 24 [2024-09-17 19:24:56,118 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 28 treesize of output 16 [2024-09-17 19:24:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-17 19:24:56,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:24:57,115 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 221 treesize of output 205 [2024-09-17 19:24:57,118 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 205 treesize of output 189 [2024-09-17 19:24:57,121 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 189 treesize of output 173 [2024-09-17 19:24:57,124 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 173 treesize of output 157 [2024-09-17 19:24:57,144 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 157 treesize of output 141 [2024-09-17 19:24:57,147 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 141 treesize of output 125 [2024-09-17 19:24:58,635 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 80 treesize of output 76 [2024-09-17 19:24:58,640 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 74 treesize of output 70 [2024-09-17 19:24:58,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2024-09-17 19:24:58,653 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 62 treesize of output 58 [2024-09-17 19:24:58,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2024-09-17 19:24:58,665 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 86 treesize of output 82 [2024-09-17 19:24:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984895426] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:59,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:24:59,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2024-09-17 19:24:59,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694440578] [2024-09-17 19:24:59,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:24:59,290 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 19:24:59,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:24:59,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 19:24:59,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 19:24:59,291 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 30 states, 25 states have (on average 1.36) internal successors, (34), 26 states have internal predecessors, (34), 7 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (17), 17 states have call predecessors, (17), 7 states have call successors, (17) [2024-09-17 19:24:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:59,533 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2024-09-17 19:24:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 19:24:59,534 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.36) internal successors, (34), 26 states have internal predecessors, (34), 7 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (17), 17 states have call predecessors, (17), 7 states have call successors, (17) Word has length 49 [2024-09-17 19:24:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:59,534 INFO L225 Difference]: With dead ends: 41 [2024-09-17 19:24:59,534 INFO L226 Difference]: Without dead ends: 39 [2024-09-17 19:24:59,535 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 19:24:59,535 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:59,536 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 138 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:24:59,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-17 19:24:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-17 19:24:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 10 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-17 19:24:59,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-09-17 19:24:59,543 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 49 [2024-09-17 19:24:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:59,543 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-09-17 19:24:59,543 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.36) internal successors, (34), 26 states have internal predecessors, (34), 7 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (17), 17 states have call predecessors, (17), 7 states have call successors, (17) [2024-09-17 19:24:59,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:59,544 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-09-17 19:24:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-17 19:24:59,544 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:59,544 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:24:59,559 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-17 19:24:59,745 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-17 19:24:59,745 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:59,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash 981047638, now seen corresponding path program 7 times [2024-09-17 19:24:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:59,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769950043] [2024-09-17 19:24:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:00,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:25:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:00,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:25:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:01,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:01,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:02,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:02,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:02,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:02,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:02,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-17 19:25:02,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:25:02,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769950043] [2024-09-17 19:25:02,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769950043] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:02,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671494377] [2024-09-17 19:25:02,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 19:25:02,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:25:02,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:25:02,837 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:25:02,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-17 19:25:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:03,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-17 19:25:03,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:25:03,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:03,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:03,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:03,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:03,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:03,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:03,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:03,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:25:03,496 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 22 treesize of output 10 [2024-09-17 19:25:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-17 19:25:03,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:25:03,997 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 59 treesize of output 55 [2024-09-17 19:25:04,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 152 [2024-09-17 19:25:04,022 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 146 treesize of output 134 [2024-09-17 19:25:04,053 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 128 treesize of output 116 [2024-09-17 19:25:04,073 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 116 treesize of output 104 [2024-09-17 19:25:04,095 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 104 treesize of output 92 [2024-09-17 19:25:04,248 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 74 treesize of output 62 [2024-09-17 19:25:04,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2024-09-17 19:25:04,931 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 58 treesize of output 54 [2024-09-17 19:25:04,935 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 52 treesize of output 48 [2024-09-17 19:25:04,938 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 46 treesize of output 42 [2024-09-17 19:25:04,943 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 40 treesize of output 36 [2024-09-17 19:25:04,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-09-17 19:25:05,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671494377] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:05,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:25:05,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 27 [2024-09-17 19:25:05,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980459343] [2024-09-17 19:25:05,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:25:05,051 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 19:25:05,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:25:05,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 19:25:05,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2024-09-17 19:25:05,052 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 27 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (17), 16 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-17 19:25:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:25:05,197 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-09-17 19:25:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 19:25:05,198 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (17), 16 states have call predecessors, (17), 6 states have call successors, (17) Word has length 50 [2024-09-17 19:25:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:25:05,198 INFO L225 Difference]: With dead ends: 42 [2024-09-17 19:25:05,198 INFO L226 Difference]: Without dead ends: 37 [2024-09-17 19:25:05,199 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 19:25:05,199 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:25:05,200 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 98 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:25:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-17 19:25:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-17 19:25:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-17 19:25:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-09-17 19:25:05,207 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2024-09-17 19:25:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:25:05,207 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-09-17 19:25:05,207 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (17), 16 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-17 19:25:05,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:25:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-09-17 19:25:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-17 19:25:05,208 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:25:05,208 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:25:05,222 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-17 19:25:05,409 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-17 19:25:05,409 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:25:05,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:25:05,409 INFO L85 PathProgramCache]: Analyzing trace with hash 419927273, now seen corresponding path program 8 times [2024-09-17 19:25:05,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:25:05,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062252905] [2024-09-17 19:25:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:25:05,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:25:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:06,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:25:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:06,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:25:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:07,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:08,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:08,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:09,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:09,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:10,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:10,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:10,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 20 proven. 80 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-17 19:25:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:25:10,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062252905] [2024-09-17 19:25:10,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062252905] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:10,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905244903] [2024-09-17 19:25:10,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:25:10,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:25:10,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:25:10,425 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:25:10,427 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-17 19:25:10,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:25:10,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:25:10,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 189 conjuncts are in the unsatisfiable core [2024-09-17 19:25:10,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:25:10,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:10,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:10,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:10,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:10,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:10,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:10,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:11,001 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 [2024-09-17 19:25:11,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:25:11,469 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 36 treesize of output 24 [2024-09-17 19:25:11,472 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 28 treesize of output 16 [2024-09-17 19:25:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 8 proven. 87 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-17 19:25:11,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:25:12,620 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 249 treesize of output 233 [2024-09-17 19:25:12,623 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 233 treesize of output 217 [2024-09-17 19:25:12,627 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 217 treesize of output 201 [2024-09-17 19:25:12,630 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 201 treesize of output 185 [2024-09-17 19:25:12,636 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 185 treesize of output 169 [2024-09-17 19:25:12,639 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 169 treesize of output 153 [2024-09-17 19:25:12,642 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 153 treesize of output 137 [2024-09-17 19:25:14,458 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 87 treesize of output 83 [2024-09-17 19:25:14,464 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 81 treesize of output 77 [2024-09-17 19:25:14,472 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 75 treesize of output 71 [2024-09-17 19:25:14,480 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 69 treesize of output 65 [2024-09-17 19:25:14,492 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 63 treesize of output 59 [2024-09-17 19:25:14,503 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 57 treesize of output 53 [2024-09-17 19:25:14,513 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 88 treesize of output 84 [2024-09-17 19:25:15,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905244903] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:15,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:25:15,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2024-09-17 19:25:15,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906684859] [2024-09-17 19:25:15,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:25:15,326 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-17 19:25:15,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:25:15,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-17 19:25:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 19:25:15,327 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 7 states have call successors, (9), 4 states have call predecessors, (9), 18 states have return successors, (19), 19 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-17 19:25:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:25:15,545 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2024-09-17 19:25:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 19:25:15,545 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 7 states have call successors, (9), 4 states have call predecessors, (9), 18 states have return successors, (19), 19 states have call predecessors, (19), 7 states have call successors, (19) Word has length 54 [2024-09-17 19:25:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:25:15,546 INFO L225 Difference]: With dead ends: 43 [2024-09-17 19:25:15,546 INFO L226 Difference]: Without dead ends: 41 [2024-09-17 19:25:15,547 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 19:25:15,547 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:25:15,547 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 83 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:25:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-17 19:25:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-17 19:25:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 11 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-17 19:25:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2024-09-17 19:25:15,556 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 54 [2024-09-17 19:25:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:25:15,556 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2024-09-17 19:25:15,556 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 7 states have call successors, (9), 4 states have call predecessors, (9), 18 states have return successors, (19), 19 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-17 19:25:15,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:25:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2024-09-17 19:25:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-17 19:25:15,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:25:15,557 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:25:15,571 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-17 19:25:15,757 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-17 19:25:15,758 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:25:15,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:25:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash 132846629, now seen corresponding path program 8 times [2024-09-17 19:25:15,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:25:15,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013370556] [2024-09-17 19:25:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:25:15,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:25:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:16,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:25:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:16,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:25:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:17,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:18,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:18,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:18,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:19,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:19,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:19,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:19,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-17 19:25:19,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:25:19,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013370556] [2024-09-17 19:25:19,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013370556] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:19,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035943474] [2024-09-17 19:25:19,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:25:19,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:25:19,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:25:19,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:25:19,634 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-17 19:25:20,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:25:20,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:25:20,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-17 19:25:20,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:25:20,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:20,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:20,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:20,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:20,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:20,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:20,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:20,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:20,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:25:20,472 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 22 treesize of output 10 [2024-09-17 19:25:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-09-17 19:25:20,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:25:21,083 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 66 treesize of output 62 [2024-09-17 19:25:21,100 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 185 treesize of output 173 [2024-09-17 19:25:21,109 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 173 treesize of output 161 [2024-09-17 19:25:21,120 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 161 treesize of output 149 [2024-09-17 19:25:21,134 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 149 treesize of output 137 [2024-09-17 19:25:21,147 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 137 treesize of output 125 [2024-09-17 19:25:21,162 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 125 treesize of output 113 [2024-09-17 19:25:21,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 101 [2024-09-17 19:25:22,614 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 71 treesize of output 67 [2024-09-17 19:25:22,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2024-09-17 19:25:22,623 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 59 treesize of output 55 [2024-09-17 19:25:22,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2024-09-17 19:25:22,631 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 47 treesize of output 43 [2024-09-17 19:25:22,636 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 41 treesize of output 37 [2024-09-17 19:25:22,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-17 19:25:22,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035943474] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:22,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:25:22,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 29 [2024-09-17 19:25:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201918609] [2024-09-17 19:25:22,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:25:22,757 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-17 19:25:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:25:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-17 19:25:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 19:25:22,758 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 29 states, 25 states have (on average 1.44) internal successors, (36), 28 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (19), 18 states have call predecessors, (19), 6 states have call successors, (19) [2024-09-17 19:25:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:25:22,892 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2024-09-17 19:25:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 19:25:22,893 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.44) internal successors, (36), 28 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (19), 18 states have call predecessors, (19), 6 states have call successors, (19) Word has length 55 [2024-09-17 19:25:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:25:22,894 INFO L225 Difference]: With dead ends: 44 [2024-09-17 19:25:22,894 INFO L226 Difference]: Without dead ends: 39 [2024-09-17 19:25:22,894 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2024-09-17 19:25:22,895 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:25:22,895 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 66 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:25:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-17 19:25:22,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-17 19:25:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-17 19:25:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-17 19:25:22,903 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-17 19:25:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:25:22,903 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-17 19:25:22,903 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.44) internal successors, (36), 28 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (19), 18 states have call predecessors, (19), 6 states have call successors, (19) [2024-09-17 19:25:22,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:25:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-17 19:25:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-17 19:25:22,904 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:25:22,904 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:25:22,924 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-17 19:25:23,105 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:25:23,105 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:25:23,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:25:23,106 INFO L85 PathProgramCache]: Analyzing trace with hash -372029144, now seen corresponding path program 9 times [2024-09-17 19:25:23,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:25:23,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146185521] [2024-09-17 19:25:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:25:23,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:25:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:24,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:25:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:24,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:25:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:25,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:26,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:27,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:27,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:28,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:28,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:28,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:28,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:29,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 23 proven. 99 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-17 19:25:29,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:25:29,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146185521] [2024-09-17 19:25:29,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146185521] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:29,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824079669] [2024-09-17 19:25:29,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:25:29,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:25:29,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:25:29,070 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:25:29,071 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-17 19:25:29,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-17 19:25:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:25:29,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 215 conjuncts are in the unsatisfiable core [2024-09-17 19:25:29,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:25:29,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:29,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:29,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:29,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:29,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:30,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:30,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:30,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:30,093 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 [2024-09-17 19:25:30,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:25:30,584 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 36 treesize of output 24 [2024-09-17 19:25:30,586 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 28 treesize of output 16 [2024-09-17 19:25:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 9 proven. 107 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-17 19:25:30,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:25:31,888 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 277 treesize of output 261 [2024-09-17 19:25:31,891 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 261 treesize of output 245 [2024-09-17 19:25:31,894 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 245 treesize of output 229 [2024-09-17 19:25:31,897 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 229 treesize of output 213 [2024-09-17 19:25:31,900 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 213 treesize of output 197 [2024-09-17 19:25:31,903 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 197 treesize of output 181 [2024-09-17 19:25:31,906 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 181 treesize of output 165 [2024-09-17 19:25:31,909 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 165 treesize of output 149 [2024-09-17 19:25:34,604 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 94 treesize of output 90 [2024-09-17 19:25:34,611 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 88 treesize of output 84 [2024-09-17 19:25:34,620 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 82 treesize of output 78 [2024-09-17 19:25:34,627 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 76 treesize of output 72 [2024-09-17 19:25:34,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2024-09-17 19:25:34,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2024-09-17 19:25:34,655 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 58 treesize of output 54 [2024-09-17 19:25:34,669 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 90 treesize of output 86 [2024-09-17 19:25:36,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824079669] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:36,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:25:36,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2024-09-17 19:25:36,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449587979] [2024-09-17 19:25:36,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:25:36,179 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-17 19:25:36,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:25:36,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-17 19:25:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 19:25:36,180 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 35 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 31 states have internal predecessors, (39), 8 states have call successors, (9), 4 states have call predecessors, (9), 20 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-17 19:25:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:25:36,427 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2024-09-17 19:25:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 19:25:36,428 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 31 states have internal predecessors, (39), 8 states have call successors, (9), 4 states have call predecessors, (9), 20 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) Word has length 59 [2024-09-17 19:25:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:25:36,428 INFO L225 Difference]: With dead ends: 45 [2024-09-17 19:25:36,428 INFO L226 Difference]: Without dead ends: 43 [2024-09-17 19:25:36,429 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 19:25:36,430 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:25:36,430 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 140 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:25:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-17 19:25:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-17 19:25:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 12 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-17 19:25:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-09-17 19:25:36,436 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 59 [2024-09-17 19:25:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:25:36,436 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-09-17 19:25:36,436 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 31 states have internal predecessors, (39), 8 states have call successors, (9), 4 states have call predecessors, (9), 20 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-17 19:25:36,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:25:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-09-17 19:25:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-17 19:25:36,437 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:25:36,437 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:25:36,453 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-17 19:25:36,638 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:25:36,639 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:25:36,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:25:36,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1352001478, now seen corresponding path program 9 times [2024-09-17 19:25:36,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:25:36,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628380423] [2024-09-17 19:25:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:25:36,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:25:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:37,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:25:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:37,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:25:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:38,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:39,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:39,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:40,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:40,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:41,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:41,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:41,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:41,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 99 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-09-17 19:25:41,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:25:41,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628380423] [2024-09-17 19:25:41,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628380423] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:41,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906394084] [2024-09-17 19:25:41,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:25:41,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:25:41,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:25:41,378 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:25:41,379 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-17 19:25:42,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-17 19:25:42,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:25:42,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 255 conjuncts are in the unsatisfiable core [2024-09-17 19:25:42,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:25:42,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:42,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:42,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:42,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:42,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:42,241 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 23 treesize of output 19 [2024-09-17 19:25:42,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:42,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:42,335 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 [2024-09-17 19:25:42,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:25:42,724 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 [2024-09-17 19:25:42,742 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 22 treesize of output 10 [2024-09-17 19:25:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 9 proven. 115 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-17 19:25:42,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:25:44,254 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 206 treesize of output 194 [2024-09-17 19:25:44,259 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 194 treesize of output 182 [2024-09-17 19:25:44,292 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 170 treesize of output 158 [2024-09-17 19:25:44,315 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 158 treesize of output 146 [2024-09-17 19:25:44,413 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 134 treesize of output 122 [2024-09-17 19:25:44,462 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 122 treesize of output 110 [2024-09-17 19:25:44,511 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 110 treesize of output 98 [2024-09-17 19:25:44,793 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 316 treesize of output 268 [2024-09-17 19:25:46,642 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 72 treesize of output 68 [2024-09-17 19:25:46,646 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 66 treesize of output 62 [2024-09-17 19:25:46,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-09-17 19:25:46,655 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 54 treesize of output 50 [2024-09-17 19:25:46,660 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 48 treesize of output 44 [2024-09-17 19:25:46,665 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 42 treesize of output 38 [2024-09-17 19:25:46,671 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 36 treesize of output 32 [2024-09-17 19:25:46,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906394084] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:46,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:25:46,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2024-09-17 19:25:46,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799121084] [2024-09-17 19:25:46,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:25:46,812 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-17 19:25:46,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:25:46,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-17 19:25:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1367, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 19:25:46,813 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 34 states have internal predecessors, (42), 7 states have call successors, (8), 4 states have call predecessors, (8), 21 states have return successors, (21), 21 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-17 19:25:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:25:47,085 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-17 19:25:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 19:25:47,086 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.3125) internal successors, (42), 34 states have internal predecessors, (42), 7 states have call successors, (8), 4 states have call predecessors, (8), 21 states have return successors, (21), 21 states have call predecessors, (21), 7 states have call successors, (21) Word has length 60 [2024-09-17 19:25:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:25:47,086 INFO L225 Difference]: With dead ends: 46 [2024-09-17 19:25:47,087 INFO L226 Difference]: Without dead ends: 41 [2024-09-17 19:25:47,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=508, Invalid=1942, Unknown=0, NotChecked=0, Total=2450 [2024-09-17 19:25:47,088 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:25:47,088 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 81 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:25:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-17 19:25:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-17 19:25:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-17 19:25:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-09-17 19:25:47,095 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 60 [2024-09-17 19:25:47,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:25:47,095 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-09-17 19:25:47,096 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.3125) internal successors, (42), 34 states have internal predecessors, (42), 7 states have call successors, (8), 4 states have call predecessors, (8), 21 states have return successors, (21), 21 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-17 19:25:47,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:25:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-09-17 19:25:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-17 19:25:47,096 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:25:47,097 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:25:47,112 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-17 19:25:47,297 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:25:47,298 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:25:47,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:25:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1924062919, now seen corresponding path program 10 times [2024-09-17 19:25:47,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:25:47,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265361885] [2024-09-17 19:25:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:25:47,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:25:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:48,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:25:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:48,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:25:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:50,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:51,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:52,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:52,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:53,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:53,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:54,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:54,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:54,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:54,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:25:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:25:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 26 proven. 120 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2024-09-17 19:25:54,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:25:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265361885] [2024-09-17 19:25:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265361885] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:25:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891131889] [2024-09-17 19:25:54,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:25:54,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:25:54,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:25:54,762 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:25:54,763 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-17 19:25:55,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:25:55,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:25:55,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 235 conjuncts are in the unsatisfiable core [2024-09-17 19:25:55,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:25:55,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:55,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:55,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:55,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:55,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:55,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:55,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:55,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:55,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:25:55,854 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 [2024-09-17 19:25:56,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:25:56,403 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 36 treesize of output 24 [2024-09-17 19:25:56,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-17 19:25:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-17 19:25:56,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:25:57,980 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 305 treesize of output 289 [2024-09-17 19:25:57,985 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 289 treesize of output 273 [2024-09-17 19:25:57,988 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 273 treesize of output 257 [2024-09-17 19:25:57,992 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 257 treesize of output 241 [2024-09-17 19:25:57,995 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 241 treesize of output 225 [2024-09-17 19:25:57,999 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 225 treesize of output 209 [2024-09-17 19:25:58,003 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 209 treesize of output 193 [2024-09-17 19:25:58,006 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 193 treesize of output 177 [2024-09-17 19:25:58,009 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 177 treesize of output 161 [2024-09-17 19:26:00,711 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 101 treesize of output 97 [2024-09-17 19:26:00,716 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 95 treesize of output 91 [2024-09-17 19:26:00,721 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 89 treesize of output 85 [2024-09-17 19:26:00,727 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 83 treesize of output 79 [2024-09-17 19:26:00,733 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 77 treesize of output 73 [2024-09-17 19:26:00,740 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 71 treesize of output 67 [2024-09-17 19:26:00,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2024-09-17 19:26:00,756 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 59 treesize of output 55 [2024-09-17 19:26:00,765 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 92 treesize of output 88 [2024-09-17 19:26:02,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891131889] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:26:02,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:26:02,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2024-09-17 19:26:02,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315704463] [2024-09-17 19:26:02,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:26:02,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-17 19:26:02,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:26:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-17 19:26:02,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 19:26:02,828 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 8 states have call successors, (9), 4 states have call predecessors, (9), 22 states have return successors, (23), 23 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-17 19:26:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:26:03,107 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2024-09-17 19:26:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 19:26:03,108 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 8 states have call successors, (9), 4 states have call predecessors, (9), 22 states have return successors, (23), 23 states have call predecessors, (23), 8 states have call successors, (23) Word has length 64 [2024-09-17 19:26:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:26:03,108 INFO L225 Difference]: With dead ends: 47 [2024-09-17 19:26:03,108 INFO L226 Difference]: Without dead ends: 45 [2024-09-17 19:26:03,109 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 19:26:03,109 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:26:03,110 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 131 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:26:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-17 19:26:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-17 19:26:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 13 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-17 19:26:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2024-09-17 19:26:03,116 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 64 [2024-09-17 19:26:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:26:03,117 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2024-09-17 19:26:03,117 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 8 states have call successors, (9), 4 states have call predecessors, (9), 22 states have return successors, (23), 23 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-17 19:26:03,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:26:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2024-09-17 19:26:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-17 19:26:03,117 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:26:03,117 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:26:03,133 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-17 19:26:03,318 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-17 19:26:03,318 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:26:03,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:26:03,318 INFO L85 PathProgramCache]: Analyzing trace with hash 483594709, now seen corresponding path program 10 times [2024-09-17 19:26:03,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:26:03,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546776430] [2024-09-17 19:26:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:26:03,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:26:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:04,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:26:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:04,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:26:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:05,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:06,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:07,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:07,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:08,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:08,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:08,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:09,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:09,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:09,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 18 proven. 120 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-17 19:26:09,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:26:09,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546776430] [2024-09-17 19:26:09,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546776430] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:26:09,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975291339] [2024-09-17 19:26:09,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:26:09,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:26:09,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:26:09,234 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:26:09,236 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-17 19:26:09,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:26:09,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:26:09,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-09-17 19:26:09,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:26:09,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:09,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:09,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:10,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:10,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:10,032 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 23 treesize of output 19 [2024-09-17 19:26:10,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:10,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:10,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:10,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:10,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:26:10,442 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 22 treesize of output 10 [2024-09-17 19:26:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-17 19:26:10,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:26:11,205 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 80 treesize of output 76 [2024-09-17 19:26:11,221 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 227 treesize of output 215 [2024-09-17 19:26:11,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 197 [2024-09-17 19:26:11,252 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 197 treesize of output 185 [2024-09-17 19:26:11,290 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 179 treesize of output 167 [2024-09-17 19:26:11,347 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 161 treesize of output 149 [2024-09-17 19:26:11,429 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 143 treesize of output 131 [2024-09-17 19:26:11,504 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 131 treesize of output 119 [2024-09-17 19:26:11,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 107 [2024-09-17 19:26:11,664 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 107 treesize of output 95 [2024-09-17 19:26:13,126 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 85 treesize of output 81 [2024-09-17 19:26:13,130 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 79 treesize of output 75 [2024-09-17 19:26:13,135 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 73 treesize of output 69 [2024-09-17 19:26:13,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2024-09-17 19:26:13,144 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 61 treesize of output 57 [2024-09-17 19:26:13,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-09-17 19:26:13,155 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 45 [2024-09-17 19:26:13,161 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 43 treesize of output 39 [2024-09-17 19:26:13,167 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 37 treesize of output 33 [2024-09-17 19:26:13,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975291339] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:26:13,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:26:13,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2024-09-17 19:26:13,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171693590] [2024-09-17 19:26:13,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:26:13,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-17 19:26:13,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:26:13,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-17 19:26:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 19:26:13,314 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 35 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-17 19:26:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:26:13,501 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-09-17 19:26:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 19:26:13,502 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) Word has length 65 [2024-09-17 19:26:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:26:13,503 INFO L225 Difference]: With dead ends: 48 [2024-09-17 19:26:13,503 INFO L226 Difference]: Without dead ends: 43 [2024-09-17 19:26:13,504 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 19:26:13,504 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:26:13,504 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 94 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:26:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-17 19:26:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-17 19:26:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-17 19:26:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2024-09-17 19:26:13,515 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 65 [2024-09-17 19:26:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:26:13,515 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2024-09-17 19:26:13,516 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-17 19:26:13,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:26:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2024-09-17 19:26:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-17 19:26:13,517 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:26:13,517 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:26:13,540 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-17 19:26:13,717 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-17 19:26:13,718 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:26:13,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:26:13,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1448668344, now seen corresponding path program 11 times [2024-09-17 19:26:13,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:26:13,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278463991] [2024-09-17 19:26:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:26:13,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:26:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:15,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:26:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:15,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:26:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:16,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:18,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:19,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:20,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:21,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:21,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:22,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:22,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:22,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:22,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:22,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 29 proven. 143 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-09-17 19:26:22,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:26:22,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278463991] [2024-09-17 19:26:22,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278463991] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:26:22,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850622505] [2024-09-17 19:26:22,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:26:22,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:26:22,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:26:22,990 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:26:22,991 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-17 19:26:25,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-17 19:26:25,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:26:25,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 259 conjuncts are in the unsatisfiable core [2024-09-17 19:26:25,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:26:26,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:26,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:26,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:26,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:26,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:26,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:26,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:26,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:26,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:26,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:26,285 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 [2024-09-17 19:26:26,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:26:26,915 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 36 treesize of output 24 [2024-09-17 19:26:26,917 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 28 treesize of output 16 [2024-09-17 19:26:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 11 proven. 153 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-17 19:26:26,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:26:28,579 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 333 treesize of output 317 [2024-09-17 19:26:28,586 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 317 treesize of output 301 [2024-09-17 19:26:28,591 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 301 treesize of output 285 [2024-09-17 19:26:28,596 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 285 treesize of output 269 [2024-09-17 19:26:28,601 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 269 treesize of output 253 [2024-09-17 19:26:28,606 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 253 treesize of output 237 [2024-09-17 19:26:28,611 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 237 treesize of output 221 [2024-09-17 19:26:28,616 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 221 treesize of output 205 [2024-09-17 19:26:28,622 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 205 treesize of output 189 [2024-09-17 19:26:28,627 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 189 treesize of output 173 [2024-09-17 19:26:32,239 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 108 treesize of output 104 [2024-09-17 19:26:32,244 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 102 treesize of output 98 [2024-09-17 19:26:32,249 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 96 treesize of output 92 [2024-09-17 19:26:32,255 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 90 treesize of output 86 [2024-09-17 19:26:32,261 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 84 treesize of output 80 [2024-09-17 19:26:32,268 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 78 treesize of output 74 [2024-09-17 19:26:32,276 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 72 treesize of output 68 [2024-09-17 19:26:32,284 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 66 treesize of output 62 [2024-09-17 19:26:32,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-09-17 19:26:32,310 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 94 treesize of output 90 [2024-09-17 19:26:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850622505] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:26:33,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:26:33,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 39 [2024-09-17 19:26:33,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362971384] [2024-09-17 19:26:33,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:26:33,874 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-17 19:26:33,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:26:33,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-17 19:26:33,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2024-09-17 19:26:33,876 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (9), 4 states have call predecessors, (9), 24 states have return successors, (25), 25 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-17 19:26:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:26:34,097 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-09-17 19:26:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-17 19:26:34,099 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (9), 4 states have call predecessors, (9), 24 states have return successors, (25), 25 states have call predecessors, (25), 8 states have call successors, (25) Word has length 69 [2024-09-17 19:26:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:26:34,099 INFO L225 Difference]: With dead ends: 49 [2024-09-17 19:26:34,099 INFO L226 Difference]: Without dead ends: 47 [2024-09-17 19:26:34,100 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=441, Invalid=1911, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 19:26:34,101 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:26:34,101 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 94 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:26:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-17 19:26:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-17 19:26:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 14 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-17 19:26:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2024-09-17 19:26:34,107 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 69 [2024-09-17 19:26:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:26:34,107 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2024-09-17 19:26:34,107 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (9), 4 states have call predecessors, (9), 24 states have return successors, (25), 25 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-17 19:26:34,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:26:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2024-09-17 19:26:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-17 19:26:34,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:26:34,108 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:26:34,132 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-17 19:26:34,309 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:26:34,309 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:26:34,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:26:34,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1959048758, now seen corresponding path program 11 times [2024-09-17 19:26:34,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:26:34,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378611258] [2024-09-17 19:26:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:26:34,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:26:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:35,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:26:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:35,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:26:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:37,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:38,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:39,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:39,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:40,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:40,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:41,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:41,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:41,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:41,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:41,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 20 proven. 143 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-09-17 19:26:41,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:26:41,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378611258] [2024-09-17 19:26:41,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378611258] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:26:41,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174988491] [2024-09-17 19:26:41,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:26:41,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:26:41,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:26:41,708 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:26:41,709 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-17 19:26:44,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-17 19:26:44,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:26:44,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-09-17 19:26:44,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:26:44,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:26:44,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:26:44,907 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 22 treesize of output 10 [2024-09-17 19:26:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2024-09-17 19:26:44,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:26:45,795 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 87 treesize of output 83 [2024-09-17 19:26:45,811 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 248 treesize of output 236 [2024-09-17 19:26:45,831 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 230 treesize of output 218 [2024-09-17 19:26:45,848 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 218 treesize of output 206 [2024-09-17 19:26:45,922 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 200 treesize of output 188 [2024-09-17 19:26:45,951 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 188 treesize of output 176 [2024-09-17 19:26:45,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 164 [2024-09-17 19:26:46,168 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 146 treesize of output 134 [2024-09-17 19:26:46,231 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 134 treesize of output 122 [2024-09-17 19:26:46,380 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 116 treesize of output 104 [2024-09-17 19:26:46,588 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 98 treesize of output 86 [2024-09-17 19:26:47,971 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 92 treesize of output 88 [2024-09-17 19:26:47,976 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 86 treesize of output 82 [2024-09-17 19:26:47,982 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 80 treesize of output 76 [2024-09-17 19:26:47,987 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 74 treesize of output 70 [2024-09-17 19:26:47,993 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 68 treesize of output 64 [2024-09-17 19:26:47,998 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 62 treesize of output 58 [2024-09-17 19:26:48,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2024-09-17 19:26:48,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2024-09-17 19:26:48,018 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 44 treesize of output 40 [2024-09-17 19:26:48,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-09-17 19:26:48,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174988491] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:26:48,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:26:48,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 37 [2024-09-17 19:26:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169676789] [2024-09-17 19:26:48,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:26:48,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-17 19:26:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:26:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-17 19:26:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 19:26:48,196 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 37 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-17 19:26:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:26:48,373 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2024-09-17 19:26:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 19:26:48,374 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 7 states have call successors, (25) Word has length 70 [2024-09-17 19:26:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:26:48,375 INFO L225 Difference]: With dead ends: 50 [2024-09-17 19:26:48,375 INFO L226 Difference]: Without dead ends: 45 [2024-09-17 19:26:48,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=511, Invalid=1651, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 19:26:48,376 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:26:48,376 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 65 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:26:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-17 19:26:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-17 19:26:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-17 19:26:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-17 19:26:48,386 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2024-09-17 19:26:48,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:26:48,386 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-17 19:26:48,386 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-17 19:26:48,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:26:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-17 19:26:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-17 19:26:48,387 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:26:48,388 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:26:48,414 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-17 19:26:48,588 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-17 19:26:48,589 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:26:48,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:26:48,589 INFO L85 PathProgramCache]: Analyzing trace with hash 918502793, now seen corresponding path program 12 times [2024-09-17 19:26:48,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:26:48,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452778566] [2024-09-17 19:26:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:26:48,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:26:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:50,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:26:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:50,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:26:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:52,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:54,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:55,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:56,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:57,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:58,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:58,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:59,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:26:59,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:26:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:00,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:00,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:00,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 32 proven. 168 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2024-09-17 19:27:00,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:27:00,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452778566] [2024-09-17 19:27:00,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452778566] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:27:00,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013751280] [2024-09-17 19:27:00,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:27:00,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:00,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:27:00,480 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:27:00,481 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-17 19:27:02,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-17 19:27:02,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:27:02,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 331 conjuncts are in the unsatisfiable core [2024-09-17 19:27:02,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:27:02,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:02,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:02,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:02,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:02,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:02,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:02,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:02,689 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 23 treesize of output 19 [2024-09-17 19:27:02,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:02,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:02,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:02,804 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 [2024-09-17 19:27:03,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:27:03,463 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 36 treesize of output 24 [2024-09-17 19:27:03,465 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 28 treesize of output 16 [2024-09-17 19:27:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-17 19:27:03,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:27:05,677 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 361 treesize of output 345 [2024-09-17 19:27:05,681 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 345 treesize of output 329 [2024-09-17 19:27:05,684 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 329 treesize of output 313 [2024-09-17 19:27:05,687 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 313 treesize of output 297 [2024-09-17 19:27:05,691 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 297 treesize of output 281 [2024-09-17 19:27:05,694 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 281 treesize of output 265 [2024-09-17 19:27:05,697 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 265 treesize of output 249 [2024-09-17 19:27:05,700 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 249 treesize of output 233 [2024-09-17 19:27:05,703 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 233 treesize of output 217 [2024-09-17 19:27:05,706 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 217 treesize of output 201 [2024-09-17 19:27:05,709 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 201 treesize of output 185 [2024-09-17 19:27:09,910 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 115 treesize of output 111 [2024-09-17 19:27:09,914 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 109 treesize of output 105 [2024-09-17 19:27:09,919 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 103 treesize of output 99 [2024-09-17 19:27:09,924 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 97 treesize of output 93 [2024-09-17 19:27:09,930 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 91 treesize of output 87 [2024-09-17 19:27:09,936 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 85 treesize of output 81 [2024-09-17 19:27:09,943 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 79 treesize of output 75 [2024-09-17 19:27:09,979 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 73 treesize of output 69 [2024-09-17 19:27:09,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2024-09-17 19:27:09,997 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 61 treesize of output 57 [2024-09-17 19:27:10,007 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 96 treesize of output 92 [2024-09-17 19:27:11,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013751280] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:27:11,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:27:11,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2024-09-17 19:27:11,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336287497] [2024-09-17 19:27:11,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:27:11,722 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-17 19:27:11,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:27:11,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-17 19:27:11,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 19:27:11,724 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 42 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 8 states have call successors, (9), 4 states have call predecessors, (9), 26 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-17 19:27:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:27:12,004 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2024-09-17 19:27:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 19:27:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 8 states have call successors, (9), 4 states have call predecessors, (9), 26 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) Word has length 74 [2024-09-17 19:27:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:27:12,005 INFO L225 Difference]: With dead ends: 51 [2024-09-17 19:27:12,009 INFO L226 Difference]: Without dead ends: 49 [2024-09-17 19:27:12,010 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=2154, Unknown=0, NotChecked=0, Total=2652 [2024-09-17 19:27:12,010 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:27:12,011 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 130 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:27:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-17 19:27:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-17 19:27:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 15 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-09-17 19:27:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2024-09-17 19:27:12,023 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 74 [2024-09-17 19:27:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:27:12,023 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2024-09-17 19:27:12,024 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 8 states have call successors, (9), 4 states have call predecessors, (9), 26 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-17 19:27:12,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2024-09-17 19:27:12,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-17 19:27:12,024 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:27:12,025 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:27:12,051 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-17 19:27:12,225 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-17 19:27:12,225 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:27:12,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:12,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1591181435, now seen corresponding path program 12 times [2024-09-17 19:27:12,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:27:12,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996836739] [2024-09-17 19:27:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:12,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:27:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:13,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:27:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:13,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:27:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:15,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:16,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:17,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:18,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:19,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:19,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:20,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:20,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:20,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:21,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:21,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:21,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 22 proven. 168 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-17 19:27:21,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:27:21,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996836739] [2024-09-17 19:27:21,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996836739] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:27:21,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164292084] [2024-09-17 19:27:21,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:27:21,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:21,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:27:21,254 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:27:21,254 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-17 19:27:23,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-17 19:27:23,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:27:23,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 301 conjuncts are in the unsatisfiable core [2024-09-17 19:27:23,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:27:23,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-17 19:27:23,434 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 [2024-09-17 19:27:23,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:27:23,959 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 [2024-09-17 19:27:23,978 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 22 treesize of output 10 [2024-09-17 19:27:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-17 19:27:23,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:27:25,881 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 269 treesize of output 257 [2024-09-17 19:27:25,904 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 1000 treesize of output 952 [2024-09-17 19:27:25,911 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 952 treesize of output 904 [2024-09-17 19:27:25,918 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 904 treesize of output 856 [2024-09-17 19:27:25,925 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 856 treesize of output 808 [2024-09-17 19:27:25,933 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 808 treesize of output 760 [2024-09-17 19:27:25,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 712 [2024-09-17 19:27:25,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 712 treesize of output 664 [2024-09-17 19:27:25,955 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 664 treesize of output 616 [2024-09-17 19:27:25,966 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 616 treesize of output 568 [2024-09-17 19:27:25,973 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 568 treesize of output 520 [2024-09-17 19:27:36,042 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 93 treesize of output 89 [2024-09-17 19:27:36,045 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 87 treesize of output 83 [2024-09-17 19:27:36,050 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 81 treesize of output 77 [2024-09-17 19:27:36,054 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 75 treesize of output 71 [2024-09-17 19:27:36,082 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 69 treesize of output 65 [2024-09-17 19:27:36,090 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 63 treesize of output 59 [2024-09-17 19:27:36,098 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 57 treesize of output 53 [2024-09-17 19:27:36,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-09-17 19:27:36,112 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 41 [2024-09-17 19:27:36,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-09-17 19:27:36,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164292084] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:27:36,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:27:36,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2024-09-17 19:27:36,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690792903] [2024-09-17 19:27:36,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:27:36,311 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-17 19:27:36,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:27:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-17 19:27:36,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1841, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 19:27:36,312 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 44 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 8 states have call successors, (9), 4 states have call predecessors, (9), 27 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-17 19:27:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:27:36,650 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-17 19:27:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-17 19:27:36,651 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 8 states have call successors, (9), 4 states have call predecessors, (9), 27 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) Word has length 75 [2024-09-17 19:27:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:27:36,652 INFO L225 Difference]: With dead ends: 52 [2024-09-17 19:27:36,652 INFO L226 Difference]: Without dead ends: 47 [2024-09-17 19:27:36,653 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=691, Invalid=2501, Unknown=0, NotChecked=0, Total=3192 [2024-09-17 19:27:36,653 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:27:36,653 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 127 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:27:36,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-17 19:27:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-17 19:27:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-17 19:27:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-09-17 19:27:36,660 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2024-09-17 19:27:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:27:36,661 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-09-17 19:27:36,661 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 8 states have call successors, (9), 4 states have call predecessors, (9), 27 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-17 19:27:36,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-09-17 19:27:36,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-17 19:27:36,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:27:36,662 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:27:36,689 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-17 19:27:36,862 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-17 19:27:36,863 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:27:36,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:36,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2044587960, now seen corresponding path program 13 times [2024-09-17 19:27:36,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:27:36,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834878088] [2024-09-17 19:27:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:36,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:27:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:39,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:27:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:39,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 19:27:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:41,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:43,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:44,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:46,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:47,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:48,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat