./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_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 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:33:36,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:33:36,808 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:33:36,813 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:33:36,814 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:33:36,841 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:33:36,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:33:36,842 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:33:36,842 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:33:36,844 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:33:36,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:33:36,845 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:33:36,845 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:33:36,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:33:36,846 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:33:36,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:33:36,849 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:33:36,849 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:33:36,850 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:33:36,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:33:36,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:33:36,850 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:33:36,850 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:33:36,851 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:33:36,851 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:33:36,851 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:33:36,851 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:33:36,851 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:33:36,851 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:33:36,852 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:33:36,852 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:33:36,852 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:33:36,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:33:36,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:33:36,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:33:36,853 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:33:36,853 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:33:36,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:33:36,853 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:33:36,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:33:36,853 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:33:36,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:33:36,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:33:37,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:33:37,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:33:37,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:33:37,087 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:33:37,087 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:33:37,088 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c [2024-09-11 20:33:38,351 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:33:38,499 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:33:38,499 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c [2024-09-11 20:33:38,505 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/68011aa64/9101c8a03f3f4b048e40414272821163/FLAG0dcdd97d9 [2024-09-11 20:33:38,909 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/68011aa64/9101c8a03f3f4b048e40414272821163 [2024-09-11 20:33:38,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:33:38,912 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:33:38,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:33:38,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:33:38,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:33:38,919 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:33:38" (1/1) ... [2024-09-11 20:33:38,920 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d908dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:38, skipping insertion in model container [2024-09-11 20:33:38,920 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:33:38" (1/1) ... [2024-09-11 20:33:38,939 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:33:39,070 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c[1137,1150] [2024-09-11 20:33:39,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:33:39,095 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:33:39,104 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c[1137,1150] [2024-09-11 20:33:39,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:33:39,137 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:33:39,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39 WrapperNode [2024-09-11 20:33:39,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:33:39,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:33:39,139 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:33:39,139 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:33:39,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,158 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,177 INFO L138 Inliner]: procedures = 16, calls = 76, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 85 [2024-09-11 20:33:39,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:33:39,178 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:33:39,178 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:33:39,178 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:33:39,211 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,214 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,240 INFO L175 MemorySlicer]: Split 46 memory accesses to 8 slices as follows [2, 8, 6, 7, 7, 4, 8, 4]. 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, 1, 2, 2, 3, 2]. [2024-09-11 20:33:39,244 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,244 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,254 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,256 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,267 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,270 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:33:39,271 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:33:39,271 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:33:39,271 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:33:39,272 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (1/1) ... [2024-09-11 20:33:39,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:33:39,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:33:39,302 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) [2024-09-11 20:33:39,305 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 [2024-09-11 20:33:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:33:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:33:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-11 20:33:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-11 20:33:39,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-11 20:33:39,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-11 20:33:39,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-11 20:33:39,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:33:39,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:33:39,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:33:39,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:33:39,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-11 20:33:39,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-11 20:33:39,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-11 20:33:39,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-11 20:33:39,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-11 20:33:39,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-11 20:33:39,344 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_41_0 [2024-09-11 20:33:39,344 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_41_0 [2024-09-11 20:33:39,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:33:39,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:33:39,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:33:39,441 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:33:39,443 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:33:39,613 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-11 20:33:39,613 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:33:39,659 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:33:39,659 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-11 20:33:39,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:33:39 BoogieIcfgContainer [2024-09-11 20:33:39,660 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:33:39,663 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:33:39,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:33:39,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:33:39,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:33:38" (1/3) ... [2024-09-11 20:33:39,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259db218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:33:39, skipping insertion in model container [2024-09-11 20:33:39,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:39" (2/3) ... [2024-09-11 20:33:39,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259db218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:33:39, skipping insertion in model container [2024-09-11 20:33:39,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:33:39" (3/3) ... [2024-09-11 20:33:39,671 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_bresenham-ll.c [2024-09-11 20:33:39,687 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:33:39,687 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:33:39,740 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:33:39,746 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;@7528b588, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:33:39,747 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:33:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-11 20:33:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 20:33:39,756 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:33:39,757 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:33:39,757 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:33:39,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:39,762 INFO L85 PathProgramCache]: Analyzing trace with hash -56389801, now seen corresponding path program 1 times [2024-09-11 20:33:39,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:33:39,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835552828] [2024-09-11 20:33:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:39,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:33:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:33:39,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091348361] [2024-09-11 20:33:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:39,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:33:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:33:39,962 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) [2024-09-11 20:33:39,964 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 20:33:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:33:40,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-11 20:33:40,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:33:40,154 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 [2024-09-11 20:33:40,166 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 [2024-09-11 20:33:40,175 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 [2024-09-11 20:33:40,190 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 [2024-09-11 20:33:40,199 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 [2024-09-11 20:33:40,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:33:40,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:33:40,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:33:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:33:40,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:33:40,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:33:40,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835552828] [2024-09-11 20:33:40,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:33:40,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091348361] [2024-09-11 20:33:40,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091348361] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:33:40,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:33:40,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-11 20:33:40,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163447274] [2024-09-11 20:33:40,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:33:40,406 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:33:40,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:33:40,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:33:40,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:33:40,427 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 20:33:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:33:40,665 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2024-09-11 20:33:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:33:40,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 20:33:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:33:40,677 INFO L225 Difference]: With dead ends: 55 [2024-09-11 20:33:40,677 INFO L226 Difference]: Without dead ends: 33 [2024-09-11 20:33:40,695 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:33:40,704 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:33:40,705 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 75 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:33:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-11 20:33:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-09-11 20:33:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-11 20:33:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-11 20:33:40,789 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2024-09-11 20:33:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:33:40,789 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-11 20:33:40,790 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 20:33:40,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-11 20:33:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-11 20:33:40,792 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:33:40,792 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:33:40,805 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 20:33:40,993 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 [2024-09-11 20:33:40,993 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:33:40,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:40,994 INFO L85 PathProgramCache]: Analyzing trace with hash 11856504, now seen corresponding path program 1 times [2024-09-11 20:33:40,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:33:40,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468096132] [2024-09-11 20:33:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:40,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:33:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:33:41,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795607406] [2024-09-11 20:33:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:41,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:33:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:33:41,079 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) [2024-09-11 20:33:41,081 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 20:33:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:33:41,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-11 20:33:41,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:33:41,179 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 [2024-09-11 20:33:41,183 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 [2024-09-11 20:33:41,187 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 [2024-09-11 20:33:41,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-09-11 20:33:41,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-11 20:33:41,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:33:41,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:33:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:33:41,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:33:41,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:33:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468096132] [2024-09-11 20:33:41,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:33:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795607406] [2024-09-11 20:33:41,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795607406] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:33:41,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:33:41,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-11 20:33:41,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873278912] [2024-09-11 20:33:41,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:33:41,319 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 20:33:41,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:33:41,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 20:33:41,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-11 20:33:41,320 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:33:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:33:41,429 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2024-09-11 20:33:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 20:33:41,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-11 20:33:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:33:41,431 INFO L225 Difference]: With dead ends: 41 [2024-09-11 20:33:41,431 INFO L226 Difference]: Without dead ends: 31 [2024-09-11 20:33:41,432 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-11 20:33:41,433 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:33:41,433 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:33:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-11 20:33:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-11 20:33:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-11 20:33:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-09-11 20:33:41,439 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2024-09-11 20:33:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:33:41,440 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-09-11 20:33:41,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:33:41,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-09-11 20:33:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-11 20:33:41,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:33:41,441 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:33:41,453 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 20:33:41,641 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 [2024-09-11 20:33:41,642 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:33:41,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash 12842250, now seen corresponding path program 1 times [2024-09-11 20:33:41,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:33:41,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725847519] [2024-09-11 20:33:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:41,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:33:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:33:41,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516310482] [2024-09-11 20:33:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:41,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:33:41,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:33:41,727 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) [2024-09-11 20:33:41,728 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 20:33:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:33:41,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-09-11 20:33:41,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:33:41,866 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 [2024-09-11 20:33:41,869 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 [2024-09-11 20:33:41,875 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 [2024-09-11 20:33:41,883 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 [2024-09-11 20:33:41,887 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 [2024-09-11 20:33:42,132 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 52 treesize of output 36 [2024-09-11 20:33:46,326 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 [2024-09-11 20:33:46,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-09-11 20:33:46,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-11 20:33:46,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-09-11 20:33:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:33:46,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:33:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:33:47,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:33:47,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725847519] [2024-09-11 20:33:47,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:33:47,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516310482] [2024-09-11 20:33:47,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516310482] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:33:47,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:33:47,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2024-09-11 20:33:47,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626056871] [2024-09-11 20:33:47,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:33:47,076 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 20:33:47,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:33:47,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 20:33:47,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=428, Unknown=1, NotChecked=0, Total=506 [2024-09-11 20:33:47,077 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:33:48,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:33:48,994 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2024-09-11 20:33:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 20:33:49,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-09-11 20:33:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:33:49,001 INFO L225 Difference]: With dead ends: 52 [2024-09-11 20:33:49,001 INFO L226 Difference]: Without dead ends: 48 [2024-09-11 20:33:49,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=191, Invalid=930, Unknown=1, NotChecked=0, Total=1122 [2024-09-11 20:33:49,002 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 20:33:49,002 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 124 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 20:33:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-11 20:33:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2024-09-11 20:33:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-11 20:33:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-09-11 20:33:49,021 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 20 [2024-09-11 20:33:49,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:33:49,021 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-09-11 20:33:49,021 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:33:49,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-09-11 20:33:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 20:33:49,023 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:33:49,023 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] [2024-09-11 20:33:49,038 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 20:33:49,223 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 [2024-09-11 20:33:49,224 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:33:49,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 405669074, now seen corresponding path program 1 times [2024-09-11 20:33:49,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:33:49,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814651419] [2024-09-11 20:33:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:49,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:33:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:33:49,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624628359] [2024-09-11 20:33:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:49,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:33:49,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:33:49,310 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) [2024-09-11 20:33:49,311 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 20:33:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:33:49,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-09-11 20:33:49,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:33:49,460 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 [2024-09-11 20:33:49,464 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 [2024-09-11 20:33:49,468 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 [2024-09-11 20:33:49,473 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 [2024-09-11 20:33:49,478 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 [2024-09-11 20:33:49,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-09-11 20:33:49,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:33:50,053 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 [2024-09-11 20:33:50,068 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 [2024-09-11 20:33:51,134 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 [2024-09-11 20:33:51,141 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 52 treesize of output 36 [2024-09-11 20:33:51,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:33:51,314 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 75 treesize of output 63 [2024-09-11 20:33:51,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:33:51,337 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 31 treesize of output 35 [2024-09-11 20:33:51,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:33:51,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2024-09-11 20:33:51,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:33:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 20:33:51,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:01,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:01,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814651419] [2024-09-11 20:34:01,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:34:01,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624628359] [2024-09-11 20:34:01,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624628359] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:34:01,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:34:01,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-11 20:34:01,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345149249] [2024-09-11 20:34:01,765 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:34:01,765 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:34:01,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:01,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:34:01,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2024-09-11 20:34:01,767 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-11 20:34:08,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:34:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:10,493 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2024-09-11 20:34:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 20:34:10,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2024-09-11 20:34:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:10,495 INFO L225 Difference]: With dead ends: 55 [2024-09-11 20:34:10,495 INFO L226 Difference]: Without dead ends: 45 [2024-09-11 20:34:10,496 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2024-09-11 20:34:10,497 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:10,497 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-09-11 20:34:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-11 20:34:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-11 20:34:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-11 20:34:10,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-09-11 20:34:10,517 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 32 [2024-09-11 20:34:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:10,517 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-09-11 20:34:10,517 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-11 20:34:10,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-09-11 20:34:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 20:34:10,518 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:10,518 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] [2024-09-11 20:34:10,532 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 20:34:10,719 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 [2024-09-11 20:34:10,719 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:10,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash 828370900, now seen corresponding path program 1 times [2024-09-11 20:34:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:10,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645127501] [2024-09-11 20:34:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:10,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:34:10,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996578341] [2024-09-11 20:34:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:10,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:10,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:10,770 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) [2024-09-11 20:34:10,771 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 20:34:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:10,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-11 20:34:10,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:10,920 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 [2024-09-11 20:34:10,921 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 [2024-09-11 20:34:10,925 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 [2024-09-11 20:34:10,930 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 [2024-09-11 20:34:10,935 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 [2024-09-11 20:34:10,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-09-11 20:34:11,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:34:11,489 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 [2024-09-11 20:34:11,531 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 [2024-09-11 20:34:12,526 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 57 treesize of output 42 [2024-09-11 20:34:12,546 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 [2024-09-11 20:34:12,569 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 [2024-09-11 20:34:12,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:34:12,675 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 63 treesize of output 51 [2024-09-11 20:34:12,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:34:12,690 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 [2024-09-11 20:34:12,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:34:12,703 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 [2024-09-11 20:34:12,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-11 20:34:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 20:34:12,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:17,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 99 [2024-09-11 20:34:17,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 91 [2024-09-11 20:34:17,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2024-09-11 20:35:38,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:38,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645127501] [2024-09-11 20:35:38,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:38,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996578341] [2024-09-11 20:35:38,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996578341] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:38,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:38,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-11 20:35:38,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451038231] [2024-09-11 20:35:38,416 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:38,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:35:38,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:38,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:35:38,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=751, Unknown=18, NotChecked=0, Total=870 [2024-09-11 20:35:38,418 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-11 20:35:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:56,231 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2024-09-11 20:35:56,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 20:35:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2024-09-11 20:35:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:56,232 INFO L225 Difference]: With dead ends: 53 [2024-09-11 20:35:56,232 INFO L226 Difference]: Without dead ends: 47 [2024-09-11 20:35:56,233 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 95.3s TimeCoverageRelationStatistics Valid=192, Invalid=1428, Unknown=20, NotChecked=0, Total=1640 [2024-09-11 20:35:56,233 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:56,234 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 57 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-09-11 20:35:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-11 20:35:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-09-11 20:35:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-11 20:35:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-09-11 20:35:56,256 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 32 [2024-09-11 20:35:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:56,256 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-09-11 20:35:56,256 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-11 20:35:56,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-09-11 20:35:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-11 20:35:56,257 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:56,258 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] [2024-09-11 20:35:56,271 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 20:35:56,458 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 [2024-09-11 20:35:56,459 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:56,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash 367418220, now seen corresponding path program 2 times [2024-09-11 20:35:56,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:56,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213768751] [2024-09-11 20:35:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:56,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:56,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114111649] [2024-09-11 20:35:56,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:35:56,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:56,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:56,545 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) [2024-09-11 20:35:56,546 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 20:35:56,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:35:56,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:35:56,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 219 conjuncts are in the unsatisfiable core [2024-09-11 20:35:56,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:56,706 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 [2024-09-11 20:35:56,733 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 [2024-09-11 20:35:56,763 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 [2024-09-11 20:35:56,791 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 15 treesize of output 1 [2024-09-11 20:35:56,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:35:56,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:36:01,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:36:02,051 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 [2024-09-11 20:36:02,180 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 [2024-09-11 20:36:07,036 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 [2024-09-11 20:36:07,088 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 59 treesize of output 43 [2024-09-11 20:36:07,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:07,702 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 77 treesize of output 65 [2024-09-11 20:36:07,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:07,790 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 [2024-09-11 20:36:07,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:07,880 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 19 treesize of output 23 [2024-09-11 20:36:07,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:36:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-11 20:36:08,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:36:31,575 WARN L293 SmtUtils]: Spent 8.91s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-11 20:36:36,613 WARN L293 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 302] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-11 20:36:46,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 118 [2024-09-11 20:36:46,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 102 [2024-09-11 20:36:46,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 90 [2024-09-11 20:36:50,835 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse14 (select |c_old(#memory_int#4)| |c_func_to_recursive_line_0_to_41_0_#in~x.base|)) (.cse13 (select |c_old(#memory_int#6)| |c_func_to_recursive_line_0_to_41_0_#in~v.base|)) (.cse4 (select (select |c_#memory_int#1| |c_func_to_recursive_line_0_to_41_0_#in~Y.base|) |c_func_to_recursive_line_0_to_41_0_#in~Y.offset|))) (let ((.cse1 (select (select |c_#memory_int#3| |c_func_to_recursive_line_0_to_41_0_#in~X.base|) |c_func_to_recursive_line_0_to_41_0_#in~X.offset|)) (.cse0 (forall ((|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_13| Int)) (let ((.cse16 (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_13|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_13|)) (.cse17 (select (select |c_#memory_int#2| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_10|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_10|))) (= (let ((.cse15 (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_13|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_13|))) (+ (* 2 (* .cse15 .cse16)) (* 2 .cse17) (* .cse15 2))) (+ (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_13|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_13|) (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_13|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_13|) (* 2 (* .cse16 .cse17))))))) (.cse5 (* .cse4 2)) (.cse2 (select .cse13 |c_func_to_recursive_line_0_to_41_0_#in~v.offset|)) (.cse3 (select .cse14 |c_func_to_recursive_line_0_to_41_0_#in~x.offset|))) (and (or .cse0 (< (+ .cse1 (* (* .cse1 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_0_to_41_0_#in~y.base|) |c_func_to_recursive_line_0_to_41_0_#in~y.offset|)) 2) .cse2) (+ (* 2 (* .cse3 .cse4)) .cse5 1))) (or (= .cse1 .cse3) .cse0) (or (< .cse2 0) .cse0) (forall ((|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_13| Int)) (let ((.cse6 (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_13|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_13|))) (let ((.cse9 (* .cse6 2)) (.cse10 (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_13|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_13|))) (or (let ((.cse7 (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_13|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_13|)) (.cse8 (select (select |c_#memory_int#2| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_10|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_10|))) (= (+ (* 2 (* .cse6 .cse7)) (* 2 .cse8) .cse9) (+ (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_13|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_13|) .cse10 (* 2 (* .cse7 .cse8))))) (not (let ((.cse12 (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_10|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_10|)) (.cse11 (select (select (store |c_old(#memory_int#4)| |c_func_to_recursive_line_0_to_41_0_#in~x.base| (store .cse14 |c_func_to_recursive_line_0_to_41_0_#in~x.offset| (+ .cse3 1))) |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_13|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_13|))) (= (+ (* 2 (* .cse6 .cse11)) (* .cse12 2) .cse9) (+ (select (select (store |c_old(#memory_int#6)| |c_func_to_recursive_line_0_to_41_0_#in~v.base| (store .cse13 |c_func_to_recursive_line_0_to_41_0_#in~v.offset| (+ .cse5 .cse2))) |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_13|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_13|) .cse10 (* 2 (* .cse12 .cse11))))))))))))) is different from false [2024-09-11 20:36:53,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:36:53,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213768751] [2024-09-11 20:36:53,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:36:53,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114111649] [2024-09-11 20:36:53,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114111649] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:36:53,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:36:53,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-11 20:36:53,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828968824] [2024-09-11 20:36:53,942 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:36:53,943 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 20:36:53,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:36:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 20:36:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=958, Unknown=1, NotChecked=62, Total=1122 [2024-09-11 20:36:53,945 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-11 20:37:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:04,191 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2024-09-11 20:37:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 20:37:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-09-11 20:37:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:04,194 INFO L225 Difference]: With dead ends: 55 [2024-09-11 20:37:04,194 INFO L226 Difference]: Without dead ends: 49 [2024-09-11 20:37:04,195 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=215, Invalid=1950, Unknown=1, NotChecked=90, Total=2256 [2024-09-11 20:37:04,195 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:04,195 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-09-11 20:37:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-11 20:37:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-09-11 20:37:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-11 20:37:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2024-09-11 20:37:04,230 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 46 [2024-09-11 20:37:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:04,230 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2024-09-11 20:37:04,230 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-11 20:37:04,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2024-09-11 20:37:04,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-11 20:37:04,232 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:04,232 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] [2024-09-11 20:37:04,245 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 20:37:04,432 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 [2024-09-11 20:37:04,432 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:04,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1438020114, now seen corresponding path program 1 times [2024-09-11 20:37:04,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:04,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707296691] [2024-09-11 20:37:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:04,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:05,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:37:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:07,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:37:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:07,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-11 20:37:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:09,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:37:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:09,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-11 20:37:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:10,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:37:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:37:10,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:10,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707296691] [2024-09-11 20:37:10,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707296691] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:10,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408582418] [2024-09-11 20:37:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:10,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:10,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:10,726 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) [2024-09-11 20:37:10,726 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 20:37:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:10,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-09-11 20:37:10,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:10,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:10,912 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 [2024-09-11 20:37:10,925 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 [2024-09-11 20:37:10,941 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 [2024-09-11 20:37:11,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:37:13,820 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 [2024-09-11 20:37:13,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:37:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-11 20:37:17,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:23,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:37:24,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:37:29,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408582418] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:37:29,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:37:29,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 19] total 48 [2024-09-11 20:37:29,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51257970] [2024-09-11 20:37:29,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:29,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-11 20:37:29,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:29,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-11 20:37:29,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2024-09-11 20:37:29,860 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 48 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 42 states have internal predecessors, (64), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 20:37:38,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:38,558 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2024-09-11 20:37:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 20:37:38,559 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 42 states have internal predecessors, (64), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) Word has length 46 [2024-09-11 20:37:38,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:38,560 INFO L225 Difference]: With dead ends: 59 [2024-09-11 20:37:38,560 INFO L226 Difference]: Without dead ends: 53 [2024-09-11 20:37:38,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=365, Invalid=2941, Unknown=0, NotChecked=0, Total=3306 [2024-09-11 20:37:38,561 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:38,561 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 122 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-09-11 20:37:38,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-11 20:37:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-09-11 20:37:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2024-09-11 20:37:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2024-09-11 20:37:38,595 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 46 [2024-09-11 20:37:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:38,595 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2024-09-11 20:37:38,595 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 42 states have internal predecessors, (64), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 20:37:38,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2024-09-11 20:37:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-11 20:37:38,596 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:38,596 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] [2024-09-11 20:37:38,610 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 20:37:38,796 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 [2024-09-11 20:37:38,797 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:38,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:38,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2012941680, now seen corresponding path program 2 times [2024-09-11 20:37:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:38,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597785871] [2024-09-11 20:37:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:38,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:38,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565250626] [2024-09-11 20:37:38,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:37:38,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:38,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:38,846 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) [2024-09-11 20:37:38,858 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 20:37:39,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:37:39,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:37:39,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 208 conjuncts are in the unsatisfiable core [2024-09-11 20:37:39,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:39,148 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 [2024-09-11 20:37:39,160 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 [2024-09-11 20:37:39,186 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 [2024-09-11 20:37:39,201 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 [2024-09-11 20:37:42,352 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 30 treesize of output 23 [2024-09-11 20:37:43,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:37:43,701 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 [2024-09-11 20:37:43,759 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 [2024-09-11 20:37:49,302 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 [2024-09-11 20:37:49,340 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 [2024-09-11 20:37:49,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:49,908 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 70 treesize of output 62 [2024-09-11 20:37:49,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:49,982 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 42 treesize of output 42 [2024-09-11 20:37:50,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:50,054 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 28 treesize of output 32 [2024-09-11 20:37:50,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-11 20:37:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 20:37:50,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:04,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 103 [2024-09-11 20:38:13,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:38:13,076 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 297 treesize of output 296