./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_01-2.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/loops/eureka_01-2.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 fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 --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 18:10:49,488 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:10:49,556 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:10:49,561 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:10:49,561 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:10:49,587 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:10:49,588 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:10:49,589 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:10:49,589 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:10:49,590 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:10:49,591 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:10:49,591 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:10:49,592 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:10:49,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:10:49,592 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:10:49,593 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:10:49,593 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:10:49,593 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:10:49,594 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:10:49,594 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:10:49,594 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:10:49,595 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:10:49,595 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:10:49,595 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:10:49,601 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:10:49,601 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:10:49,602 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:10:49,602 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:10:49,602 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:10:49,602 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:10:49,602 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:10:49,602 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:10:49,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:10:49,603 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:10:49,603 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:10:49,603 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:10:49,603 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:10:49,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:10:49,603 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:10:49,604 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:10:49,604 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:10:49,605 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:10:49,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:10:49,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:10:49,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:10:49,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:10:49,873 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:10:49,874 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:10:49,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/eureka_01-2.c [2024-09-17 18:10:51,252 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:10:51,413 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:10:51,413 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_01-2.c [2024-09-17 18:10:51,418 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/548991640/b621b047b8e54435bf678704be286b88/FLAGb7616b14a [2024-09-17 18:10:51,430 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/548991640/b621b047b8e54435bf678704be286b88 [2024-09-17 18:10:51,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:10:51,433 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:10:51,434 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:10:51,434 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:10:51,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:10:51,440 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,440 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e688f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51, skipping insertion in model container [2024-09-17 18:10:51,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,455 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:10:51,564 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/loops/eureka_01-2.c[323,336] [2024-09-17 18:10:51,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:10:51,601 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:10:51,611 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/loops/eureka_01-2.c[323,336] [2024-09-17 18:10:51,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:10:51,650 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:10:51,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51 WrapperNode [2024-09-17 18:10:51,651 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:10:51,652 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:10:51,652 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:10:51,652 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:10:51,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,666 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,675 INFO L138 Inliner]: procedures = 13, calls = 100, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:10:51,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:10:51,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:10:51,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:10:51,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:10:51,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,696 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,716 INFO L175 MemorySlicer]: Split 78 memory accesses to 5 slices as follows [2, 22, 23, 22, 9]. 29 percent of accesses are in the largest equivalence class. The 62 initializations are split as follows [2, 20, 20, 20, 0]. The 3 writes are split as follows [0, 0, 0, 0, 3]. [2024-09-17 18:10:51,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,733 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,738 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,739 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,744 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,748 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:10:51,749 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:10:51,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:10:51,749 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:10:51,750 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (1/1) ... [2024-09-17 18:10:51,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:10:51,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:10:51,772 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 18:10:51,774 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 18:10:51,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:10:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:10:51,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:10:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:10:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-17 18:10:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-17 18:10:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-17 18:10:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-17 18:10:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-17 18:10:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-17 18:10:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-17 18:10:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-17 18:10:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-17 18:10:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-17 18:10:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:10:51,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:10:51,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:10:51,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:10:51,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-17 18:10:51,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-17 18:10:51,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-17 18:10:51,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-17 18:10:51,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-17 18:10:51,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:10:51,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:10:51,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-17 18:10:51,907 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:10:51,909 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:10:52,121 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-09-17 18:10:52,121 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:10:52,135 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:10:52,135 INFO L318 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-17 18:10:52,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:10:52 BoogieIcfgContainer [2024-09-17 18:10:52,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:10:52,137 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:10:52,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:10:52,139 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:10:52,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:10:51" (1/3) ... [2024-09-17 18:10:52,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10fa0377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:10:52, skipping insertion in model container [2024-09-17 18:10:52,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:10:51" (2/3) ... [2024-09-17 18:10:52,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10fa0377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:10:52, skipping insertion in model container [2024-09-17 18:10:52,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:10:52" (3/3) ... [2024-09-17 18:10:52,144 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2024-09-17 18:10:52,158 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:10:52,158 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:10:52,205 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:10:52,210 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;@5152c2f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:10:52,210 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:10:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:10:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-17 18:10:52,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:52,219 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:52,219 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:52,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:52,223 INFO L85 PathProgramCache]: Analyzing trace with hash 765619845, now seen corresponding path program 1 times [2024-09-17 18:10:52,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:52,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266571758] [2024-09-17 18:10:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:52,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:52,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:52,447 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 18:10:52,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:52,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266571758] [2024-09-17 18:10:52,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266571758] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:10:52,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:10:52,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 18:10:52,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439109925] [2024-09-17 18:10:52,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:10:52,457 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 18:10:52,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 18:10:52,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 18:10:52,481 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:52,572 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2024-09-17 18:10:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 18:10:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-17 18:10:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:52,580 INFO L225 Difference]: With dead ends: 56 [2024-09-17 18:10:52,581 INFO L226 Difference]: Without dead ends: 27 [2024-09-17 18:10:52,583 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 18:10:52,586 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:52,589 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 7 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:10:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-17 18:10:52,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-17 18:10:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 3 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 18:10:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-17 18:10:52,622 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2024-09-17 18:10:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:52,622 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-17 18:10:52,622 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:52,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-17 18:10:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-17 18:10:52,624 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:52,624 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:52,625 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:10:52,625 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:52,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1688893081, now seen corresponding path program 1 times [2024-09-17 18:10:52,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:52,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224547569] [2024-09-17 18:10:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:52,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:52,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:52,806 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 18:10:52,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:52,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224547569] [2024-09-17 18:10:52,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224547569] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:10:52,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:10:52,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-17 18:10:52,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877391394] [2024-09-17 18:10:52,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:10:52,810 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 18:10:52,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:52,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 18:10:52,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 18:10:52,811 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:52,916 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-09-17 18:10:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 18:10:52,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-17 18:10:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:52,918 INFO L225 Difference]: With dead ends: 49 [2024-09-17 18:10:52,918 INFO L226 Difference]: Without dead ends: 30 [2024-09-17 18:10:52,919 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:10:52,920 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:52,920 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 7 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:10:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-17 18:10:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-09-17 18:10:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 3 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 18:10:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-09-17 18:10:52,930 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2024-09-17 18:10:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:52,931 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-09-17 18:10:52,931 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:52,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-09-17 18:10:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-17 18:10:52,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:52,932 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:52,932 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 18:10:52,932 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:52,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:52,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1747889571, now seen corresponding path program 1 times [2024-09-17 18:10:52,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:52,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301592564] [2024-09-17 18:10:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:53,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:10:53,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:53,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301592564] [2024-09-17 18:10:53,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301592564] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:10:53,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:10:53,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:10:53,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783210746] [2024-09-17 18:10:53,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:10:53,069 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:10:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:10:53,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:10:53,074 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:53,197 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2024-09-17 18:10:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:10:53,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-17 18:10:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:53,199 INFO L225 Difference]: With dead ends: 53 [2024-09-17 18:10:53,200 INFO L226 Difference]: Without dead ends: 40 [2024-09-17 18:10:53,200 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:10:53,201 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 83 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:53,201 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 7 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:10:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-17 18:10:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2024-09-17 18:10:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 3 states have call successors, (3), 3 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 18:10:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-09-17 18:10:53,214 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 19 [2024-09-17 18:10:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:53,214 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-09-17 18:10:53,214 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:53,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-09-17 18:10:53,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-17 18:10:53,215 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:53,215 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:53,215 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-17 18:10:53,216 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:53,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:53,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1285563913, now seen corresponding path program 1 times [2024-09-17 18:10:53,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:53,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514669192] [2024-09-17 18:10:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:53,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:53,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:10:53,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:53,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514669192] [2024-09-17 18:10:53,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514669192] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:10:53,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:10:53,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:10:53,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965549723] [2024-09-17 18:10:53,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:10:53,325 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:10:53,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:10:53,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:10:53,326 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:53,423 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2024-09-17 18:10:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:10:53,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-17 18:10:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:53,424 INFO L225 Difference]: With dead ends: 50 [2024-09-17 18:10:53,426 INFO L226 Difference]: Without dead ends: 32 [2024-09-17 18:10:53,426 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:10:53,427 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:53,427 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 10 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:10:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-17 18:10:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-17 18:10:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 3 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 18:10:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-09-17 18:10:53,433 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2024-09-17 18:10:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:53,435 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-09-17 18:10:53,436 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:53,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-09-17 18:10:53,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-17 18:10:53,436 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:53,436 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:53,437 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-17 18:10:53,437 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:53,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1170342884, now seen corresponding path program 1 times [2024-09-17 18:10:53,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:53,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601208098] [2024-09-17 18:10:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:53,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:53,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:10:53,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:53,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601208098] [2024-09-17 18:10:53,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601208098] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:10:53,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:10:53,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:10:53,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313832161] [2024-09-17 18:10:53,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:10:53,528 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:10:53,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:53,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:10:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:10:53,528 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:53,630 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-09-17 18:10:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:10:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-17 18:10:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:53,632 INFO L225 Difference]: With dead ends: 49 [2024-09-17 18:10:53,632 INFO L226 Difference]: Without dead ends: 39 [2024-09-17 18:10:53,632 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:10:53,633 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:53,633 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 10 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:10:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-17 18:10:53,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2024-09-17 18:10:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 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 18:10:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-09-17 18:10:53,639 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2024-09-17 18:10:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:53,639 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-09-17 18:10:53,639 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:53,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-09-17 18:10:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-17 18:10:53,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:53,640 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:53,640 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-17 18:10:53,640 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:53,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:53,641 INFO L85 PathProgramCache]: Analyzing trace with hash -466136846, now seen corresponding path program 1 times [2024-09-17 18:10:53,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:53,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793793490] [2024-09-17 18:10:53,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:53,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:53,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:10:53,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:53,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793793490] [2024-09-17 18:10:53,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793793490] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:10:53,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447825958] [2024-09-17 18:10:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:53,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:10:53,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:10:53,735 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 18:10:53,736 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 18:10:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:53,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-17 18:10:53,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:10:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:10:53,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:10:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:10:53,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447825958] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:10:53,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:10:53,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-09-17 18:10:53,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320008000] [2024-09-17 18:10:53,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:10:53,921 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-17 18:10:53,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:53,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-17 18:10:53,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:10:53,921 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:54,101 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-09-17 18:10:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:10:54,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-17 18:10:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:54,102 INFO L225 Difference]: With dead ends: 62 [2024-09-17 18:10:54,102 INFO L226 Difference]: Without dead ends: 40 [2024-09-17 18:10:54,102 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:10:54,103 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:54,103 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 19 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:10:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-17 18:10:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-17 18:10:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 3 states have call successors, (3), 3 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 18:10:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-09-17 18:10:54,115 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 27 [2024-09-17 18:10:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:54,115 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-09-17 18:10:54,115 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:54,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-09-17 18:10:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-17 18:10:54,116 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:54,116 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:54,130 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 18:10:54,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-17 18:10:54,317 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:54,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2081475630, now seen corresponding path program 2 times [2024-09-17 18:10:54,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:54,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437115189] [2024-09-17 18:10:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:54,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:54,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-17 18:10:54,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437115189] [2024-09-17 18:10:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437115189] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:10:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669997928] [2024-09-17 18:10:54,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:10:54,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:10:54,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:10:54,430 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 18:10:54,431 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 18:10:54,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:10:54,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:10:54,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-17 18:10:54,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:10:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-17 18:10:54,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:10:54,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669997928] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:10:54,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:10:54,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-09-17 18:10:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585741063] [2024-09-17 18:10:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:10:54,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 18:10:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 18:10:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:10:54,572 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:54,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:54,616 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2024-09-17 18:10:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 18:10:54,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-17 18:10:54,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:54,617 INFO L225 Difference]: With dead ends: 70 [2024-09-17 18:10:54,617 INFO L226 Difference]: Without dead ends: 40 [2024-09-17 18:10:54,618 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:10:54,618 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:54,618 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:10:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-17 18:10:54,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-17 18:10:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 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 18:10:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-09-17 18:10:54,630 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 36 [2024-09-17 18:10:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:54,631 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-09-17 18:10:54,634 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:54,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-09-17 18:10:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-17 18:10:54,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:54,636 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:54,651 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 18:10:54,836 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-17 18:10:54,837 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:54,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1575312, now seen corresponding path program 1 times [2024-09-17 18:10:54,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:54,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040463924] [2024-09-17 18:10:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:54,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:55,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:10:55,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040463924] [2024-09-17 18:10:55,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040463924] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:10:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437062692] [2024-09-17 18:10:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:55,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:10:55,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:10:55,023 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 18:10:55,025 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 18:10:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:55,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:10:55,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:10:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:10:55,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:10:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:10:55,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437062692] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:10:55,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:10:55,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-09-17 18:10:55,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103322359] [2024-09-17 18:10:55,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:10:55,293 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:10:55,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:55,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:10:55,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2024-09-17 18:10:55,295 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:55,472 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-17 18:10:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:10:55,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-17 18:10:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:55,473 INFO L225 Difference]: With dead ends: 67 [2024-09-17 18:10:55,473 INFO L226 Difference]: Without dead ends: 45 [2024-09-17 18:10:55,473 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:10:55,474 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:55,474 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 16 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:10:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-17 18:10:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-09-17 18:10:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 3 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 18:10:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-09-17 18:10:55,490 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 36 [2024-09-17 18:10:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:55,491 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-09-17 18:10:55,492 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:55,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-09-17 18:10:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-17 18:10:55,494 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:55,494 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:55,508 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 18:10:55,694 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-17 18:10:55,695 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:55,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:55,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1534550158, now seen corresponding path program 2 times [2024-09-17 18:10:55,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:55,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98806606] [2024-09-17 18:10:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:55,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:55,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:10:55,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:55,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98806606] [2024-09-17 18:10:55,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98806606] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:10:55,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33533823] [2024-09-17 18:10:55,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:10:55,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:10:55,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:10:55,814 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 18:10:55,816 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 18:10:55,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:10:55,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:10:55,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-17 18:10:55,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:10:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:10:55,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:10:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:10:55,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33533823] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:10:55,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:10:55,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-09-17 18:10:55,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314106715] [2024-09-17 18:10:55,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:10:56,000 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-17 18:10:56,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:56,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-17 18:10:56,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-09-17 18:10:56,001 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:56,125 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-09-17 18:10:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 18:10:56,126 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-17 18:10:56,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:56,127 INFO L225 Difference]: With dead ends: 72 [2024-09-17 18:10:56,128 INFO L226 Difference]: Without dead ends: 52 [2024-09-17 18:10:56,128 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:10:56,129 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 95 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:56,129 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 10 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:10:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-17 18:10:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-17 18:10:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 3 states have call successors, (3), 3 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 18:10:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2024-09-17 18:10:56,138 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 39 [2024-09-17 18:10:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:56,138 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2024-09-17 18:10:56,138 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:56,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:56,138 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2024-09-17 18:10:56,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:10:56,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:56,139 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:56,155 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 18:10:56,344 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:10:56,344 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:56,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash -217673339, now seen corresponding path program 3 times [2024-09-17 18:10:56,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:56,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274684514] [2024-09-17 18:10:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:56,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:56,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:10:56,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:56,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274684514] [2024-09-17 18:10:56,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274684514] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:10:56,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289493973] [2024-09-17 18:10:56,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:10:56,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:10:56,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:10:56,586 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 18:10:56,588 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 18:10:56,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-17 18:10:56,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:10:56,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-17 18:10:56,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:10:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-17 18:10:56,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:10:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-17 18:10:56,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289493973] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:10:56,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:10:56,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2024-09-17 18:10:56,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458430294] [2024-09-17 18:10:56,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:10:56,801 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:10:56,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:56,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:10:56,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:10:56,802 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:57,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:57,338 INFO L93 Difference]: Finished difference Result 163 states and 215 transitions. [2024-09-17 18:10:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:10:57,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2024-09-17 18:10:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:57,340 INFO L225 Difference]: With dead ends: 163 [2024-09-17 18:10:57,340 INFO L226 Difference]: Without dead ends: 134 [2024-09-17 18:10:57,341 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=663, Invalid=1317, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 18:10:57,341 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 526 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:57,342 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 19 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:10:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-17 18:10:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2024-09-17 18:10:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 105 states have (on average 1.276190476190476) internal successors, (134), 105 states have internal predecessors, (134), 3 states have call successors, (3), 3 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 18:10:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 139 transitions. [2024-09-17 18:10:57,375 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 139 transitions. Word has length 48 [2024-09-17 18:10:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:57,377 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 139 transitions. [2024-09-17 18:10:57,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:57,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 139 transitions. [2024-09-17 18:10:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-17 18:10:57,383 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:57,383 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:57,397 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 18:10:57,584 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-17 18:10:57,584 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:57,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:57,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1562879381, now seen corresponding path program 4 times [2024-09-17 18:10:57,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:57,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819382047] [2024-09-17 18:10:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:57,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:57,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:10:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:10:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 262 proven. 35 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2024-09-17 18:10:57,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:10:57,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819382047] [2024-09-17 18:10:57,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819382047] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:10:57,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634679798] [2024-09-17 18:10:57,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:10:57,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:10:57,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:10:57,856 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 18:10:57,858 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 18:10:57,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:10:57,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:10:57,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 18:10:57,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:10:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 26 proven. 227 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2024-09-17 18:10:58,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:10:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 26 proven. 227 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2024-09-17 18:10:58,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634679798] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:10:58,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:10:58,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2024-09-17 18:10:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490982337] [2024-09-17 18:10:58,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:10:58,335 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 18:10:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:10:58,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 18:10:58,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:10:58,338 INFO L87 Difference]: Start difference. First operand 111 states and 139 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:59,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:10:59,467 INFO L93 Difference]: Finished difference Result 284 states and 378 transitions. [2024-09-17 18:10:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-17 18:10:59,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2024-09-17 18:10:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:10:59,469 INFO L225 Difference]: With dead ends: 284 [2024-09-17 18:10:59,469 INFO L226 Difference]: Without dead ends: 212 [2024-09-17 18:10:59,472 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1485, Invalid=4995, Unknown=0, NotChecked=0, Total=6480 [2024-09-17 18:10:59,473 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 1161 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:10:59,473 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 25 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 18:10:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-09-17 18:10:59,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 131. [2024-09-17 18:10:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.264) internal successors, (158), 125 states have internal predecessors, (158), 3 states have call successors, (3), 3 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 18:10:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2024-09-17 18:10:59,511 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 107 [2024-09-17 18:10:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:10:59,511 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2024-09-17 18:10:59,512 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:10:59,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2024-09-17 18:10:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-17 18:10:59,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:10:59,513 INFO L216 NwaCegarLoop]: trace histogram [24, 24, 24, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:10:59,529 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 18:10:59,714 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-17 18:10:59,714 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:10:59,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:10:59,715 INFO L85 PathProgramCache]: Analyzing trace with hash 583062961, now seen corresponding path program 5 times [2024-09-17 18:10:59,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:10:59,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065338252] [2024-09-17 18:10:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:10:59,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:10:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:00,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:11:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 367 proven. 51 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2024-09-17 18:11:00,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:11:00,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065338252] [2024-09-17 18:11:00,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065338252] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:11:00,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758766652] [2024-09-17 18:11:00,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:11:00,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:11:00,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:11:00,039 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 18:11:00,041 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 18:11:30,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2024-09-17 18:11:30,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:11:30,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:11:30,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:11:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 614 proven. 51 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-09-17 18:11:30,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:11:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 493 proven. 172 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-09-17 18:11:31,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758766652] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:11:31,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:11:31,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-09-17 18:11:31,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566098021] [2024-09-17 18:11:31,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:11:31,004 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-17 18:11:31,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:11:31,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-17 18:11:31,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2024-09-17 18:11:31,005 INFO L87 Difference]: Start difference. First operand 131 states and 163 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 25 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:11:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:11:31,343 INFO L93 Difference]: Finished difference Result 316 states and 435 transitions. [2024-09-17 18:11:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:11:31,343 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 25 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2024-09-17 18:11:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:11:31,345 INFO L225 Difference]: With dead ends: 316 [2024-09-17 18:11:31,345 INFO L226 Difference]: Without dead ends: 227 [2024-09-17 18:11:31,346 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=574, Invalid=1066, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 18:11:31,347 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 152 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:11:31,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 16 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:11:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-17 18:11:31,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2024-09-17 18:11:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.2941176470588236) internal successors, (286), 221 states have internal predecessors, (286), 3 states have call successors, (3), 3 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 18:11:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 291 transitions. [2024-09-17 18:11:31,408 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 291 transitions. Word has length 127 [2024-09-17 18:11:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:11:31,408 INFO L474 AbstractCegarLoop]: Abstraction has 227 states and 291 transitions. [2024-09-17 18:11:31,408 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 25 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:11:31,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:11:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 291 transitions. [2024-09-17 18:11:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-09-17 18:11:31,412 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:11:31,412 INFO L216 NwaCegarLoop]: trace histogram [56, 56, 56, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:11:31,443 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 18:11:31,612 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:11:31,613 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:11:31,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:11:31,613 INFO L85 PathProgramCache]: Analyzing trace with hash 790417841, now seen corresponding path program 6 times [2024-09-17 18:11:31,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:11:31,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505389387] [2024-09-17 18:11:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:11:31,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:11:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:32,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:11:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4937 backedges. 1855 proven. 287 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2024-09-17 18:11:32,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:11:32,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505389387] [2024-09-17 18:11:32,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505389387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:11:32,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711874816] [2024-09-17 18:11:32,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:11:32,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:11:32,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:11:32,392 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 18:11:32,393 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 18:11:34,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-17 18:11:34,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:11:34,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-17 18:11:34,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:11:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4937 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2024-09-17 18:11:34,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:11:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4937 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2024-09-17 18:11:34,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711874816] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:11:34,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:11:34,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 34 [2024-09-17 18:11:34,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351429166] [2024-09-17 18:11:34,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:11:34,691 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-17 18:11:34,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:11:34,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-17 18:11:34,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:11:34,692 INFO L87 Difference]: Start difference. First operand 227 states and 291 transitions. Second operand has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:11:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:11:43,584 INFO L93 Difference]: Finished difference Result 1002 states and 1350 transitions. [2024-09-17 18:11:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2024-09-17 18:11:43,584 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2024-09-17 18:11:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:11:43,589 INFO L225 Difference]: With dead ends: 1002 [2024-09-17 18:11:43,590 INFO L226 Difference]: Without dead ends: 841 [2024-09-17 18:11:43,602 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29015 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21038, Invalid=53764, Unknown=0, NotChecked=0, Total=74802 [2024-09-17 18:11:43,603 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 3828 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:11:43,604 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3829 Valid, 34 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:11:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2024-09-17 18:11:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 255. [2024-09-17 18:11:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 249 states have (on average 1.2771084337349397) internal successors, (318), 249 states have internal predecessors, (318), 3 states have call successors, (3), 3 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 18:11:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 323 transitions. [2024-09-17 18:11:43,673 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 323 transitions. Word has length 223 [2024-09-17 18:11:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:11:43,673 INFO L474 AbstractCegarLoop]: Abstraction has 255 states and 323 transitions. [2024-09-17 18:11:43,673 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:11:43,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:11:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 323 transitions. [2024-09-17 18:11:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2024-09-17 18:11:43,675 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:11:43,676 INFO L216 NwaCegarLoop]: trace histogram [60, 60, 60, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:11:43,704 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-17 18:11:43,876 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:11:43,876 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:11:43,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:11:43,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1735881021, now seen corresponding path program 7 times [2024-09-17 18:11:43,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:11:43,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111010179] [2024-09-17 18:11:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:11:43,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:11:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:44,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:11:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2024-09-17 18:11:44,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:11:44,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111010179] [2024-09-17 18:11:44,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111010179] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:11:44,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297500687] [2024-09-17 18:11:44,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:11:44,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:11:44,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:11:44,812 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 18:11:44,816 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 18:11:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:45,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:11:45,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:11:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2024-09-17 18:11:45,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:11:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2024-09-17 18:11:45,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297500687] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:11:45,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:11:45,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 41 [2024-09-17 18:11:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688552922] [2024-09-17 18:11:45,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:11:45,819 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-17 18:11:45,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:11:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-17 18:11:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1001, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 18:11:45,820 INFO L87 Difference]: Start difference. First operand 255 states and 323 transitions. Second operand has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 40 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:11:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:11:46,273 INFO L93 Difference]: Finished difference Result 501 states and 659 transitions. [2024-09-17 18:11:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-17 18:11:46,274 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 40 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2024-09-17 18:11:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:11:46,276 INFO L225 Difference]: With dead ends: 501 [2024-09-17 18:11:46,276 INFO L226 Difference]: Without dead ends: 315 [2024-09-17 18:11:46,277 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 471 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1300, Invalid=2482, Unknown=0, NotChecked=0, Total=3782 [2024-09-17 18:11:46,277 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 221 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:11:46,277 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 22 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:11:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-09-17 18:11:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2024-09-17 18:11:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.2880258899676376) internal successors, (398), 309 states have internal predecessors, (398), 3 states have call successors, (3), 3 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 18:11:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 403 transitions. [2024-09-17 18:11:46,352 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 403 transitions. Word has length 251 [2024-09-17 18:11:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:11:46,352 INFO L474 AbstractCegarLoop]: Abstraction has 315 states and 403 transitions. [2024-09-17 18:11:46,353 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 40 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:11:46,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:11:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 403 transitions. [2024-09-17 18:11:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2024-09-17 18:11:46,355 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:11:46,355 INFO L216 NwaCegarLoop]: trace histogram [80, 80, 80, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:11:46,373 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-17 18:11:46,559 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-17 18:11:46,560 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:11:46,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:11:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1724060895, now seen corresponding path program 8 times [2024-09-17 18:11:46,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:11:46,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147239265] [2024-09-17 18:11:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:11:46,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:11:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:47,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:11:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10053 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2024-09-17 18:11:47,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:11:47,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147239265] [2024-09-17 18:11:47,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147239265] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:11:47,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120383395] [2024-09-17 18:11:47,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:11:47,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:11:47,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:11:47,131 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 18:11:47,132 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 18:11:47,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:11:47,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:11:47,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 1934 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:11:47,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:11:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10053 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2024-09-17 18:11:48,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:11:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10053 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2024-09-17 18:11:48,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120383395] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:11:48,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:11:48,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-09-17 18:11:48,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436312411] [2024-09-17 18:11:48,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:11:48,482 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:11:48,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:11:48,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:11:48,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:11:48,483 INFO L87 Difference]: Start difference. First operand 315 states and 403 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 19 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:11:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:11:48,776 INFO L93 Difference]: Finished difference Result 431 states and 546 transitions. [2024-09-17 18:11:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:11:48,777 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 19 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2024-09-17 18:11:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:11:48,779 INFO L225 Difference]: With dead ends: 431 [2024-09-17 18:11:48,779 INFO L226 Difference]: Without dead ends: 391 [2024-09-17 18:11:48,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 613 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2024-09-17 18:11:48,780 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 288 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:11:48,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 16 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:11:48,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2024-09-17 18:11:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 378. [2024-09-17 18:11:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 372 states have (on average 1.2956989247311828) internal successors, (482), 372 states have internal predecessors, (482), 3 states have call successors, (3), 3 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 18:11:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 487 transitions. [2024-09-17 18:11:48,870 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 487 transitions. Word has length 311 [2024-09-17 18:11:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:11:48,871 INFO L474 AbstractCegarLoop]: Abstraction has 378 states and 487 transitions. [2024-09-17 18:11:48,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 19 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:11:48,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:11:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 487 transitions. [2024-09-17 18:11:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2024-09-17 18:11:48,872 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:11:48,873 INFO L216 NwaCegarLoop]: trace histogram [100, 100, 100, 14, 14, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:11:48,888 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 18:11:49,073 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-17 18:11:49,074 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:11:49,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:11:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash 416411771, now seen corresponding path program 9 times [2024-09-17 18:11:49,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:11:49,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127878224] [2024-09-17 18:11:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:11:49,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:11:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:50,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:11:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:11:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15616 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2024-09-17 18:11:50,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:11:50,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127878224] [2024-09-17 18:11:50,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127878224] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:11:50,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485297508] [2024-09-17 18:11:50,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:11:50,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:11:50,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:11:50,379 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 18:11:50,380 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 18:11:50,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-17 18:11:50,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:11:50,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-17 18:11:50,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:11:50,976 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 19 treesize of output 1 [2024-09-17 18:11:51,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2024-09-17 18:11:51,290 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2024-09-17 18:11:51,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 22 [2024-09-17 18:11:51,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-17 18:11:51,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 18:11:51,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-09-17 18:11:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15616 backedges. 506 proven. 37 refuted. 0 times theorem prover too weak. 15073 trivial. 0 not checked. [2024-09-17 18:11:51,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:12:24,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2024-09-17 18:12:24,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 18:12:24,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19314 treesize of output 17798 [2024-09-17 18:12:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15616 backedges. 506 proven. 37 refuted. 0 times theorem prover too weak. 15073 trivial. 0 not checked. [2024-09-17 18:12:33,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485297508] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:12:33,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:12:33,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 14] total 42 [2024-09-17 18:12:33,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635446346] [2024-09-17 18:12:33,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:12:33,484 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-17 18:12:33,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:12:33,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-17 18:12:33,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1489, Unknown=9, NotChecked=0, Total=1722 [2024-09-17 18:12:33,486 INFO L87 Difference]: Start difference. First operand 378 states and 487 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:12:43,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:12:52,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:13:36,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:13:40,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:13:44,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:13:48,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:14:13,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:14:14,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:14:18,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:14:22,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:14:55,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-17 18:14:59,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]