./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 --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-f1d7dc9-m [2024-09-20 13:11:43,382 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:11:43,450 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:11:43,455 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:11:43,455 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:11:43,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:11:43,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:11:43,475 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:11:43,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:11:43,476 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:11:43,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:11:43,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:11:43,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:11:43,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:11:43,478 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:11:43,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:11:43,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:11:43,479 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:11:43,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:11:43,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:11:43,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:11:43,483 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:11:43,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:11:43,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:11:43,484 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:11:43,484 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:11:43,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:11:43,485 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:11:43,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:11:43,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:11:43,485 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:11:43,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:11:43,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:11:43,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:11:43,486 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:11:43,486 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:11:43,487 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:11:43,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:11:43,490 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:11:43,490 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:11:43,490 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:11:43,491 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:11:43,491 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:11:43,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:11:43,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:11:43,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:11:43,760 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:11:43,760 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:11:43,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c [2024-09-20 13:11:45,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:11:45,294 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:11:45,295 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c [2024-09-20 13:11:45,303 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/af98fc353/d184759eac2d453a872a73f483d455e1/FLAGdfe8ccd83 [2024-09-20 13:11:45,315 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/af98fc353/d184759eac2d453a872a73f483d455e1 [2024-09-20 13:11:45,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:11:45,318 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:11:45,319 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:11:45,320 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:11:45,325 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:11:45,325 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722a38d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45, skipping insertion in model container [2024-09-20 13:11:45,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,346 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:11:45,507 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c[1137,1150] [2024-09-20 13:11:45,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:11:45,532 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:11:45,542 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c[1137,1150] [2024-09-20 13:11:45,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:11:45,572 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:11:45,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45 WrapperNode [2024-09-20 13:11:45,573 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:11:45,574 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:11:45,574 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:11:45,574 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:11:45,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,591 INFO L138 Inliner]: procedures = 16, calls = 76, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:11:45,592 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:11:45,592 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:11:45,592 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:11:45,592 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:11:45,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,603 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,619 INFO L175 MemorySlicer]: Split 46 memory accesses to 8 slices as follows [2, 7, 7, 4, 8, 4, 8, 6]. 17 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0]. The 13 writes are split as follows [0, 1, 2, 2, 3, 2, 1, 2]. [2024-09-20 13:11:45,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,628 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,629 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,630 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,632 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:11:45,635 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:11:45,635 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:11:45,635 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:11:45,636 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (1/1) ... [2024-09-20 13:11:45,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:11:45,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:11:45,663 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) [2024-09-20 13:11:45,681 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 [2024-09-20 13:11:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:11:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:11:45,759 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:11:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:11:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 13:11:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 13:11:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 13:11:45,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 13:11:45,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 13:11:45,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 13:11:45,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-20 13:11:45,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 13:11:45,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 13:11:45,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 13:11:45,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 13:11:45,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 13:11:45,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 13:11:45,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 13:11:45,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 13:11:45,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-20 13:11:45,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:11:45,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:11:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:11:45,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:11:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 13:11:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 13:11:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 13:11:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 13:11:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 13:11:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 13:11:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 13:11:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-20 13:11:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_41_0 [2024-09-20 13:11:45,766 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_41_0 [2024-09-20 13:11:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 13:11:45,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 13:11:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 13:11:45,892 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:11:45,894 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:11:46,179 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-20 13:11:46,180 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:11:46,207 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:11:46,209 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 13:11:46,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:11:46 BoogieIcfgContainer [2024-09-20 13:11:46,209 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:11:46,212 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:11:46,212 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:11:46,215 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:11:46,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:11:45" (1/3) ... [2024-09-20 13:11:46,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a471f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:11:46, skipping insertion in model container [2024-09-20 13:11:46,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:45" (2/3) ... [2024-09-20 13:11:46,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a471f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:11:46, skipping insertion in model container [2024-09-20 13:11:46,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:11:46" (3/3) ... [2024-09-20 13:11:46,218 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_bresenham-ll.c [2024-09-20 13:11:46,234 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:11:46,234 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:11:46,289 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:11:46,294 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;@220a036f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:11:46,294 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:11:46,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 13:11:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-20 13:11:46,304 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:11:46,305 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:11:46,305 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:11:46,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:11:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1584617207, now seen corresponding path program 1 times [2024-09-20 13:11:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:11:46,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993270018] [2024-09-20 13:11:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:11:46,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:11:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:11:46,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333175184] [2024-09-20 13:11:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:11:46,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:11:46,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:11:46,540 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) [2024-09-20 13:11:46,541 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:11:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:46,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-20 13:11:46,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:11:46,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:11:46,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:11:46,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:11:46,781 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 25 treesize of output 19 [2024-09-20 13:11:46,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:11:46,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-20 13:11:46,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 13:11:46,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:11:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:11:47,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:11:47,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:11:47,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993270018] [2024-09-20 13:11:47,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:11:47,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333175184] [2024-09-20 13:11:47,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333175184] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:11:47,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:11:47,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 13:11:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452198974] [2024-09-20 13:11:47,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:11:47,061 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:11:47,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:11:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:11:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 13:11:47,087 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:11:47,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:11:47,384 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2024-09-20 13:11:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:11:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-20 13:11:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:11:47,394 INFO L225 Difference]: With dead ends: 63 [2024-09-20 13:11:47,395 INFO L226 Difference]: Without dead ends: 37 [2024-09-20 13:11:47,399 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:11:47,403 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:11:47,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 114 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:11:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-20 13:11:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-09-20 13:11:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 13:11:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-09-20 13:11:47,443 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 12 [2024-09-20 13:11:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:11:47,445 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-09-20 13:11:47,445 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:11:47,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:11:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-09-20 13:11:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 13:11:47,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:11:47,447 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:11:47,467 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 13:11:47,651 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-20 13:11:47,652 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:11:47,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:11:47,653 INFO L85 PathProgramCache]: Analyzing trace with hash 404436698, now seen corresponding path program 1 times [2024-09-20 13:11:47,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:11:47,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584772207] [2024-09-20 13:11:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:11:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:11:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:11:47,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727360507] [2024-09-20 13:11:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:11:47,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:11:47,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:11:47,780 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) [2024-09-20 13:11:47,781 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:11:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:47,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 13:11:47,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:11:47,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:11:47,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:11:47,936 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 25 treesize of output 19 [2024-09-20 13:11:47,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-09-20 13:11:48,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-20 13:11:48,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 13:11:48,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:11:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:11:48,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:11:48,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:11:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584772207] [2024-09-20 13:11:48,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:11:48,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727360507] [2024-09-20 13:11:48,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727360507] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:11:48,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:11:48,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 13:11:48,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992749554] [2024-09-20 13:11:48,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:11:48,138 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 13:11:48,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:11:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 13:11:48,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 13:11:48,139 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 13:11:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:11:48,308 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2024-09-20 13:11:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:11:48,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-09-20 13:11:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:11:48,311 INFO L225 Difference]: With dead ends: 45 [2024-09-20 13:11:48,311 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 13:11:48,312 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 13:11:48,312 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:11:48,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:11:48,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 13:11:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-20 13:11:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 13:11:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-09-20 13:11:48,347 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2024-09-20 13:11:48,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:11:48,347 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-09-20 13:11:48,348 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 13:11:48,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:11:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-09-20 13:11:48,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 13:11:48,350 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:11:48,350 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:11:48,367 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 13:11:48,554 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:11:48,555 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:11:48,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:11:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1939087400, now seen corresponding path program 1 times [2024-09-20 13:11:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:11:48,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259051057] [2024-09-20 13:11:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:11:48,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:11:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:11:48,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757647907] [2024-09-20 13:11:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:11:48,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:11:48,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:11:48,671 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) [2024-09-20 13:11:48,673 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:11:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:48,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-09-20 13:11:48,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:11:48,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:11:48,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:11:48,936 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 25 treesize of output 19 [2024-09-20 13:11:48,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:11:48,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:11:49,362 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 43 treesize of output 31 [2024-09-20 13:11:53,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:11:53,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-20 13:11:53,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 13:11:53,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-20 13:11:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:11:53,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:11:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:11:54,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:11:54,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259051057] [2024-09-20 13:11:54,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:11:54,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757647907] [2024-09-20 13:11:54,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757647907] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:11:54,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:11:54,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2024-09-20 13:11:54,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905133740] [2024-09-20 13:11:54,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:11:54,896 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 13:11:54,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:11:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 13:11:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=520, Unknown=1, NotChecked=0, Total=600 [2024-09-20 13:11:54,899 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 25 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 13:11:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:11:56,383 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-09-20 13:11:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 13:11:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-09-20 13:11:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:11:56,385 INFO L225 Difference]: With dead ends: 56 [2024-09-20 13:11:56,386 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 13:11:56,386 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=169, Invalid=952, Unknown=1, NotChecked=0, Total=1122 [2024-09-20 13:11:56,388 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 13:11:56,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 158 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 13:11:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 13:11:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-09-20 13:11:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-20 13:11:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2024-09-20 13:11:56,411 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 24 [2024-09-20 13:11:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:11:56,412 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2024-09-20 13:11:56,412 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 13:11:56,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:11:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2024-09-20 13:11:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 13:11:56,414 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:11:56,414 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:11:56,431 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 13:11:56,617 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-20 13:11:56,618 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:11:56,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:11:56,618 INFO L85 PathProgramCache]: Analyzing trace with hash 674694001, now seen corresponding path program 1 times [2024-09-20 13:11:56,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:11:56,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596508541] [2024-09-20 13:11:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:11:56,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:11:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:11:56,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870055739] [2024-09-20 13:11:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:11:56,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:11:56,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:11:56,725 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) [2024-09-20 13:11:56,727 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:11:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:56,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-09-20 13:11:56,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:11:56,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:11:56,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:11:56,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:11:57,305 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 8 treesize of output 1 [2024-09-20 13:11:57,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-09-20 13:11:57,527 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 21 treesize of output 17 [2024-09-20 13:11:57,551 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 21 treesize of output 17 [2024-09-20 13:11:58,413 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:11:58,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2024-09-20 13:11:58,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:11:58,454 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 110 treesize of output 98 [2024-09-20 13:11:58,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:11:58,492 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 74 treesize of output 70 [2024-09-20 13:11:58,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2024-09-20 13:11:58,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:11:58,531 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 51 treesize of output 47 [2024-09-20 13:11:58,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:11:58,569 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 21 treesize of output 25 [2024-09-20 13:11:58,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:11:58,585 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 17 treesize of output 21 [2024-09-20 13:11:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:11:58,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:00,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2024-09-20 13:12:00,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 81 [2024-09-20 13:12:00,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-09-20 13:12:04,780 WARN L854 $PredicateComparison]: unable to prove that (and (or (= (let ((.cse0 (select (select |c_#memory_int#6| |c_func_to_recursive_line_0_to_41_0_#in~Y.base|) |c_func_to_recursive_line_0_to_41_0_#in~Y.offset|))) (+ (* (* .cse0 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_0_to_41_0_#in~x.base|) |c_func_to_recursive_line_0_to_41_0_#in~x.offset|)) 2) (* .cse0 2))) (let ((.cse1 (select (select |c_#memory_int#1| |c_func_to_recursive_line_0_to_41_0_#in~X.base|) |c_func_to_recursive_line_0_to_41_0_#in~X.offset|))) (+ .cse1 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_0_to_41_0_#in~v.base|) |c_func_to_recursive_line_0_to_41_0_#in~v.offset|) (* (* (select (select |c_old(#memory_int#7)| |c_func_to_recursive_line_0_to_41_0_#in~y.base|) |c_func_to_recursive_line_0_to_41_0_#in~y.offset|) .cse1) 2)))) (forall ((|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_4| Int)) (let ((.cse2 (select (select |c_#memory_int#2| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_4|)) (.cse3 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_4|))) (= (+ (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_4|) (* 2 (* .cse2 .cse3)) (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_4|)) (let ((.cse4 (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_4|))) (+ (* 2 (* .cse2 .cse4)) (* .cse4 2) (* .cse3 2))))))) (forall ((|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_4| Int)) (let ((.cse8 (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_4|))) (let ((.cse9 (* .cse8 2)) (.cse5 (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_4|))) (or (let ((.cse6 (select (select |c_#memory_int#2| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_4|)) (.cse7 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_4|))) (= (+ .cse5 (* 2 (* .cse6 .cse7)) (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_4|)) (+ (* 2 (* .cse6 .cse8)) .cse9 (* .cse7 2)))) (not (let ((.cse11 (select (select |c_old(#memory_int#7)| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_4|)) (.cse10 (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_4|))) (= (+ (* 2 (* .cse8 .cse10)) .cse9 (* .cse11 2)) (+ (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_4|) .cse5 (* 2 (* .cse11 .cse10))))))))))) is different from false [2024-09-20 13:12:05,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:05,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596508541] [2024-09-20 13:12:05,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:05,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870055739] [2024-09-20 13:12:05,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870055739] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:05,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:12:05,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-20 13:12:05,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712791924] [2024-09-20 13:12:05,101 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:05,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 13:12:05,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 13:12:05,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=427, Unknown=1, NotChecked=42, Total=552 [2024-09-20 13:12:05,103 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 18 states, 15 states have (on average 1.6) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 13:12:07,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:07,067 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-09-20 13:12:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 13:12:07,067 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.6) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2024-09-20 13:12:07,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:07,068 INFO L225 Difference]: With dead ends: 59 [2024-09-20 13:12:07,069 INFO L226 Difference]: Without dead ends: 49 [2024-09-20 13:12:07,069 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=193, Invalid=932, Unknown=1, NotChecked=64, Total=1190 [2024-09-20 13:12:07,070 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:07,070 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 60 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 13:12:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-20 13:12:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-09-20 13:12:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 10 states have call successors, (10), 8 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-20 13:12:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2024-09-20 13:12:07,105 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2024-09-20 13:12:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:07,105 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2024-09-20 13:12:07,105 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.6) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 13:12:07,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2024-09-20 13:12:07,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 13:12:07,107 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:07,107 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:07,125 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:12:07,307 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:07,307 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:07,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1097395827, now seen corresponding path program 1 times [2024-09-20 13:12:07,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:07,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191239788] [2024-09-20 13:12:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:07,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:07,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927561432] [2024-09-20 13:12:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:07,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:07,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:07,386 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) [2024-09-20 13:12:07,388 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:12:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:07,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-09-20 13:12:07,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:07,576 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 25 treesize of output 19 [2024-09-20 13:12:07,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:12:07,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:07,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:12:07,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:07,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-09-20 13:12:08,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:08,418 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 21 treesize of output 17 [2024-09-20 13:12:14,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:12:14,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:12:14,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2024-09-20 13:12:15,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-09-20 13:12:15,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-20 13:12:15,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-20 13:12:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 13:12:19,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:29,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-09-20 13:12:33,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-09-20 13:12:33,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2024-09-20 13:12:33,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2024-09-20 13:12:33,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2024-09-20 13:12:37,871 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_8| Int)) (let ((.cse9 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8|)) (.cse11 (select (select |c_#memory_int#2| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_8|))) (= (let ((.cse10 (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_8|))) (+ (* .cse9 2) (* .cse10 2) (* (* .cse10 .cse11) 2))) (+ (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_8|) (* 2 (* .cse9 .cse11))))))) (.cse1 (select (select |c_#memory_int#1| |c_func_to_recursive_line_0_to_41_0_#in~X.base|) |c_func_to_recursive_line_0_to_41_0_#in~X.offset|))) (and (or .cse0 (< .cse1 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_0_to_41_0_#in~x.base|) |c_func_to_recursive_line_0_to_41_0_#in~x.offset|))) (or .cse0 (= (mod (+ .cse1 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_0_to_41_0_#in~v.base|) |c_func_to_recursive_line_0_to_41_0_#in~v.offset|)) 2) 0)) (forall ((|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_8| Int)) (let ((.cse5 (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_8|))) (let ((.cse6 (* .cse5 2)) (.cse4 (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_8|))) (or (not (let ((.cse2 (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_8|)) (.cse3 (select (select |c_old(#memory_int#7)| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8|))) (= (+ (* 2 (* .cse2 .cse3)) .cse4 (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_8|)) (+ (* (* .cse5 .cse2) 2) (* 2 .cse3) .cse6)))) (let ((.cse7 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8|)) (.cse8 (select (select |c_#memory_int#2| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_8|))) (= (+ (* .cse7 2) .cse6 (* (* .cse5 .cse8) 2)) (+ (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_8|) .cse4 (* 2 (* .cse7 .cse8))))))))))) is different from false [2024-09-20 13:12:42,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:42,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191239788] [2024-09-20 13:12:42,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:42,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927561432] [2024-09-20 13:12:42,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927561432] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:42,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:12:42,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-20 13:12:42,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285383607] [2024-09-20 13:12:42,806 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:42,806 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 13:12:42,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:42,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 13:12:42,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=714, Unknown=5, NotChecked=54, Total=870 [2024-09-20 13:12:42,808 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 13:12:48,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:12:52,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:12:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:52,811 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-09-20 13:12:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 13:12:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2024-09-20 13:12:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:52,815 INFO L225 Difference]: With dead ends: 59 [2024-09-20 13:12:52,817 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 13:12:52,818 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=198, Invalid=1441, Unknown=5, NotChecked=78, Total=1722 [2024-09-20 13:12:52,819 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:52,819 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 76 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 418 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2024-09-20 13:12:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 13:12:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-09-20 13:12:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-20 13:12:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-09-20 13:12:52,871 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 36 [2024-09-20 13:12:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:52,872 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-09-20 13:12:52,873 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 13:12:52,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-09-20 13:12:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 13:12:52,874 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:52,875 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:52,894 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 13:12:53,076 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:53,076 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:53,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:53,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1787231606, now seen corresponding path program 1 times [2024-09-20 13:12:53,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:53,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260756346] [2024-09-20 13:12:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:53,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:54,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:12:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:54,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:12:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:56,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:12:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:56,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:12:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:57,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:12:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:57,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:12:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:57,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:12:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 13:12:57,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:57,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260756346] [2024-09-20 13:12:57,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260756346] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:57,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556095276] [2024-09-20 13:12:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:57,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:57,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:57,591 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) [2024-09-20 13:12:57,592 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:12:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:57,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-09-20 13:12:57,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:57,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:12:57,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:12:57,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:12:57,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:12:57,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-09-20 13:12:58,746 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 44 treesize of output 21 [2024-09-20 13:12:58,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:12:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 13:12:59,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:01,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:13:03,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556095276] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:13:03,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:13:03,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 19] total 48 [2024-09-20 13:13:03,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724006342] [2024-09-20 13:13:03,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:03,446 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 13:13:03,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:03,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 13:13:03,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2014, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 13:13:03,448 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 48 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 42 states have internal predecessors, (65), 19 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 13:13:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:06,111 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2024-09-20 13:13:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:13:06,112 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 42 states have internal predecessors, (65), 19 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) Word has length 50 [2024-09-20 13:13:06,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:06,113 INFO L225 Difference]: With dead ends: 63 [2024-09-20 13:13:06,113 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 13:13:06,114 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=351, Invalid=2841, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 13:13:06,115 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:06,115 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 128 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 13:13:06,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 13:13:06,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-09-20 13:13:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (19), 10 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-20 13:13:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-09-20 13:13:06,147 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 50 [2024-09-20 13:13:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:06,148 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-09-20 13:13:06,148 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 42 states have internal predecessors, (65), 19 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 13:13:06,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-09-20 13:13:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 13:13:06,150 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:06,150 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:06,164 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 13:13:06,350 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:06,351 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:06,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1663730188, now seen corresponding path program 2 times [2024-09-20 13:13:06,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:06,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344013984] [2024-09-20 13:13:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:06,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649552037] [2024-09-20 13:13:06,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:13:06,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:06,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:06,411 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) [2024-09-20 13:13:06,413 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:13:06,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:13:06,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:13:06,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-09-20 13:13:06,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:06,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:13:06,785 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 25 treesize of output 19 [2024-09-20 13:13:06,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:06,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:06,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:13:06,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-09-20 13:13:08,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:08,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-09-20 13:13:19,750 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 50 treesize of output 39 [2024-09-20 13:13:19,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:19,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:19,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-20 13:13:19,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:19,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2024-09-20 13:13:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 21 refuted. 1 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 13:13:27,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:37,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2024-09-20 13:13:37,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2024-09-20 13:13:37,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-09-20 13:14:47,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:47,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344013984] [2024-09-20 13:14:47,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:14:47,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649552037] [2024-09-20 13:14:47,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649552037] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:47,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:14:47,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 13:14:47,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932249847] [2024-09-20 13:14:47,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:47,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 13:14:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 13:14:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=879, Unknown=19, NotChecked=0, Total=992 [2024-09-20 13:14:47,759 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 13:15:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:02,211 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2024-09-20 13:15:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 13:15:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 50 [2024-09-20 13:15:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:02,213 INFO L225 Difference]: With dead ends: 63 [2024-09-20 13:15:02,213 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 13:15:02,214 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 100.7s TimeCoverageRelationStatistics Valid=202, Invalid=1759, Unknown=19, NotChecked=0, Total=1980 [2024-09-20 13:15:02,214 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:15:02,214 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 89 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2024-09-20 13:15:02,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 13:15:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-09-20 13:15:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (19), 10 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-20 13:15:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-09-20 13:15:02,243 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 50 [2024-09-20 13:15:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:02,243 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-09-20 13:15:02,243 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 13:15:02,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-09-20 13:15:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 13:15:02,245 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:02,245 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:15:02,260 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 13:15:02,446 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:02,446 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:02,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:02,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1218196061, now seen corresponding path program 2 times [2024-09-20 13:15:02,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:02,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205708149] [2024-09-20 13:15:02,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:02,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:03,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:15:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:03,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:15:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:06,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:15:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:06,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:15:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:07,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:15:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:07,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:15:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:09,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:15:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:09,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:15:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:09,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:15:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 13:15:09,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:15:09,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205708149] [2024-09-20 13:15:09,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205708149] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:15:09,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741248143] [2024-09-20 13:15:09,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:15:09,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:09,212 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) [2024-09-20 13:15:09,213 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:15:09,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:15:09,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:15:09,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-09-20 13:15:09,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:15:09,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:15:09,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:15:09,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:15:09,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-09-20 13:15:12,928 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 44 treesize of output 21 [2024-09-20 13:15:12,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:15:16,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-09-20 13:15:16,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 13:15:23,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-20 13:15:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 13:15:24,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:15:33,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-20 13:15:40,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-20 13:15:40,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-09-20 13:15:44,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-09-20 13:15:54,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-20 13:15:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 13:15:58,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741248143] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:15:58,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:15:58,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 25] total 54 [2024-09-20 13:15:58,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634731555] [2024-09-20 13:15:58,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:15:58,919 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-20 13:15:58,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:15:58,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-20 13:15:58,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 13:15:58,921 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 54 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 46 states have internal predecessors, (80), 22 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 17 states have call predecessors, (23), 21 states have call successors, (23)